N25Q256A 1.8V Datasheet by Micron Technology Inc.

Micron Serial NOR Flash Memory

1.8V, Multiple I/O, 4KB Sector Erase

N25Q256A

Features

• SPI-compatible serial bus interface

• Double transfer rate (DTR) mode

• 1.7–2.0V single supply voltage

• 108 MHz (MAX) clock frequency supported for all

protocols in single transfer rate (STR) mode

• 54 MHz (MAX) clock frequency supported for all

protocols in DTR mode

• Dual/quad I/O instruction provides increased

throughput up to 54 MB/s

• Supported protocols

– Extended SPI, dual I/O, and quad I/O

– DTR mode supported on all

• Execute-in-place (XIP) mode for all three protocols

– Configurable via volatile or nonvolatile registers

– Enables memory to work in XIP mode directly af-

ter power-on

• PROGRAM/ERASE SUSPEND operations

• Continuous read of entire memory via a single com-

mand

– Fast read

– Quad or dual output fast read

– Quad or dual I/O fast read

• Flexible to fit application

– Configurable number of dummy cycles

– Output buffer configurable

• Software reset

– Additional RESET# pin for selected part numbers

• 3-byte and 4-byte addressability mode supported

• 64-byte, user-lockable, one-time programmable

(OTP) dedicated area

• Erase capability

– Subsector erase 4KB uniform granularity blocks

– Sector erase 64KB uniform granularity blocks

– Full-chip erase

• Write protection

– Software write protection applicable to every

64KB sector via volatile lock bit

– Hardware write protection: protected area size

defined by five nonvolatile bits (BP0, BP1, BP2,

BP3, and TB)

– Additional smart protections, available upon re-

quest

• Electronic signature

– JEDEC-standard 2-byte signature (BB19h)

– Unique ID of 17 read-only bytes including: addi-

tional extended device ID (EDID) to identify de-

vice factory options; customized factory data

• Minimum 100,000 ERASE cycles per sector

• More than 20 years data retention

• Packages JEDEC standard, all RoHS compliant

– V-PDFN-8/8mm x 6mm (also known as SON,

DFPN, MLP, MLF)

– SOP2-16/300 mil (also known as SO16W, SO16-

Wide, SOIC-16)

– T-PBGA-24b05/6mm x 8mm (also known as

TBGA24)

1.8V, 256Mb: Multiple I/O Serial Flash Memory

Features

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Products and specifications discussed herein are subject to change by Micron without notice.

Contents

Device Description ........................................................................................................................................... 6

Features ....................................................................................................................................................... 6

3-Byte Address and 4-Byte Address Modes ..................................................................................................... 6

Operating Protocols ...................................................................................................................................... 6

XIP Mode ..................................................................................................................................................... 6

Device Configurability .................................................................................................................................. 7

Signal Assignments ........................................................................................................................................... 8

Signal Descriptions ......................................................................................................................................... 10

Memory Organization .................................................................................................................................... 12

Memory Configuration and Block Diagram .................................................................................................. 12

Memory Map – 256Mb Density ....................................................................................................................... 13

Device Protection ........................................................................................................................................... 14

Block Protection Areas ................................................................................................................................ 15

Serial Peripheral Interface Modes .................................................................................................................... 17

SPI Protocols .................................................................................................................................................. 19

Nonvolatile and Volatile Registers ................................................................................................................... 20

Status Register ............................................................................................................................................ 21

Nonvolatile and Volatile Configuration Registers .......................................................................................... 21

Extended Address Register .......................................................................................................................... 25

Enhanced Volatile Configuration Register .................................................................................................... 26

Flag Status Register ..................................................................................................................................... 27

Command Definitions .................................................................................................................................... 28

READ REGISTER and WRITE REGISTER Operations ........................................................................................ 32

READ STATUS REGISTER or FLAG STATUS REGISTER Command ................................................................ 32

READ NONVOLATILE CONFIGURATION REGISTER Command ................................................................... 32

READ VOLATILE or ENHANCED VOLATILE CONFIGURATION REGISTER Command .................................. 33

READ EXTENDED ADDRESS REGISTER Command ..................................................................................... 33

WRITE STATUS REGISTER Command ......................................................................................................... 33

WRITE NONVOLATILE CONFIGURATION REGISTER Command ................................................................. 34

WRITE VOLATILE or ENHANCED VOLATILE CONFIGURATION REGISTER Command ................................. 34

WRITE EXTENDED ADDRESS REGISTER Command ................................................................................... 35

READ LOCK REGISTER Command .............................................................................................................. 35

WRITE LOCK REGISTER Command ............................................................................................................ 36

CLEAR FLAG STATUS REGISTER Command ................................................................................................ 37

READ IDENTIFICATION Operations ............................................................................................................... 38

READ ID and MULTIPLE I/O READ ID Commands ...................................................................................... 38

READ SERIAL FLASH DISCOVERY PARAMETER Command ......................................................................... 39

READ MEMORY Operations ............................................................................................................................ 43

3-Byte Address ........................................................................................................................................... 43

4-Byte Address ........................................................................................................................................... 45

READ MEMORY Operations Timing – Single Transfer Rate ........................................................................... 46

READ MEMORY Operations Timing – Double Transfer Rate ......................................................................... 50

PROGRAM Operations .................................................................................................................................... 53

WRITE Operations .......................................................................................................................................... 57

WRITE ENABLE Command ......................................................................................................................... 57

WRITE DISABLE Command ........................................................................................................................ 57

ERASE Operations .......................................................................................................................................... 59

SUBSECTOR ERASE Command ................................................................................................................... 59

SECTOR ERASE Command ......................................................................................................................... 59

BULK ERASE Command ............................................................................................................................. 60

1.8V, 256Mb: Multiple I/O Serial Flash Memory

Features

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PROGRAM/ERASE SUSPEND Command ..................................................................................................... 61

PROGRAM/ERASE RESUME Command ...................................................................................................... 63

RESET Operations .......................................................................................................................................... 64

RESET ENABLE and RESET MEMORY Command ........................................................................................ 64

RESET Conditions ...................................................................................................................................... 64

ONE TIME PROGRAMMABLE Operations ....................................................................................................... 65

READ OTP ARRAY Command ...................................................................................................................... 65

PROGRAM OTP ARRAY Command .............................................................................................................. 65

ADDRESS MODE Operations – Enter and Exit 4-Byte Address Mode ................................................................. 68

ENTER or EXIT 4-BYTE ADDRESS MODE Command ................................................................................... 68

ENTER or EXIT QUAD Command ................................................................................................................ 68

XIP Mode ....................................................................................................................................................... 69

Activate or Terminate XIP Using Volatile Configuration Register ................................................................... 69

Activate or Terminate XIP Using Nonvolatile Configuration Register ............................................................. 69

Confirmation Bit Settings Required to Activate or Terminate XIP .................................................................. 70

Terminating XIP After a Controller and Memory Reset ................................................................................. 71

Power Up and Power Down ............................................................................................................................. 72

Power Up and Power Down Requirements ................................................................................................... 72

Power Loss Recovery Sequence ................................................................................................................... 73

Initial Delivery Status ..................................................................................................................................... 73

AC Reset Specifications ................................................................................................................................... 74

Absolute Ratings and Operating Conditions ..................................................................................................... 78

DC Characteristics and Operating Conditions .................................................................................................. 80

AC Characteristics and Operating Conditions .................................................................................................. 81

Package Dimensions ....................................................................................................................................... 83

Part Number Ordering Information ................................................................................................................. 86

Revision History ............................................................................................................................................. 88

Rev. O – 11/16 ............................................................................................................................................. 88

Rev. N – 05/16 ............................................................................................................................................. 88

Rev. M – 03/14 ............................................................................................................................................ 88

Rev. L – 01/14 ............................................................................................................................................. 88

Rev. K – 09/13 ............................................................................................................................................. 88

Rev. J – 01/13 .............................................................................................................................................. 88

Rev. I – 07/12 .............................................................................................................................................. 88

Rev. H – 06/12 ............................................................................................................................................. 88

Rev. G, Production – 02/12 .......................................................................................................................... 89

Rev. F, Production – 02/12 ........................................................................................................................... 89

Rev. E, Production – 01/12 ........................................................................................................................... 89

Rev. D, Production – 09/11 .......................................................................................................................... 89

Rev. C – 11/10 ............................................................................................................................................. 89

Rev. B – 08/10 ............................................................................................................................................. 89

Rev. A – 06/10 ............................................................................................................................................. 89

1.8V, 256Mb: Multiple I/O Serial Flash Memory

Features

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List of Figures

Figure 1: Logic Diagram ................................................................................................................................... 7

Figure 2: 8-Lead, VDFPN8 – MLP8 (Top View) .................................................................................................. 8

Figure 3: 16-Lead, Plastic Small Outline – SO16 (Top View) ............................................................................... 8

Figure 4: 24-Ball TBGA (Balls Down) ................................................................................................................ 9

Figure 5: Block Diagram ................................................................................................................................ 12

Figure 6: Bus Master and Memory Devices on the SPI Bus ............................................................................... 18

Figure 7: SPI Modes ....................................................................................................................................... 18

Figure 8: Internal Configuration Register ........................................................................................................ 20

Figure 9: Upper and Lower 128Mb Memory Array Segments ........................................................................... 25

Figure 10: READ REGISTER Command .......................................................................................................... 32

Figure 11: WRITE REGISTER Command ......................................................................................................... 34

Figure 12: READ LOCK REGISTER Command ................................................................................................. 36

Figure 13: WRITE LOCK REGISTER Command ............................................................................................... 37

Figure 14: READ ID and MULTIPLE I/O Read ID Commands .......................................................................... 39

Figure 15: READ Command ........................................................................................................................... 46

Figure 16: FAST READ Command ................................................................................................................... 46

Figure 17: DUAL OUTPUT FAST READ Command – STR ................................................................................. 47

Figure 18: DUAL INPUT/OUTPUT FAST READ Command – STR ..................................................................... 47

Figure 19: QUAD OUTPUT FAST READ Command – STR ................................................................................ 48

Figure 20: QUAD INPUT/OUTPUT FAST READ Command – STR .................................................................... 48

Figure 21: FAST READ Command – DTR ......................................................................................................... 50

Figure 22: DUAL OUTPUT FAST READ Command – DTR ................................................................................ 51

Figure 23: DUAL INPUT/OUTPUT FAST READ Command – DTR .................................................................... 51

Figure 24: QUAD OUTPUT FAST READ Command – DTR ............................................................................... 52

Figure 25: QUAD INPUT/OUTPUT FAST READ Command – DTR ................................................................... 52

Figure 26: PAGE PROGRAM Command .......................................................................................................... 54

Figure 27: DUAL INPUT FAST PROGRAM Command ...................................................................................... 54

Figure 28: EXTENDED DUAL INPUT FAST PROGRAM Command ................................................................... 55

Figure 29: QUAD INPUT FAST PROGRAM Command ..................................................................................... 55

Figure 30: EXTENDED QUAD INPUT FAST PROGRAM Command ................................................................... 56

Figure 31: WRITE ENABLE and WRITE DISABLE Command Sequence ............................................................ 58

Figure 32: SUBSECTOR and SECTOR ERASE Command .................................................................................. 60

Figure 33: BULK ERASE Command ................................................................................................................ 61

Figure 34: RESET ENABLE and RESET MEMORY Command ........................................................................... 64

Figure 35: READ OTP Command .................................................................................................................... 65

Figure 36: PROGRAM OTP Command ............................................................................................................ 67

Figure 37: XIP Mode Directly After Power-On .................................................................................................. 70

Figure 38: Power-Up Timing .......................................................................................................................... 72

Figure 39: Reset AC Timing During PROGRAM or ERASE Cycle ........................................................................ 75

Figure 40: Reset Enable ................................................................................................................................. 75

Figure 41: Serial Input Timing ........................................................................................................................ 75

Figure 42: Write Protect Setup and Hold During WRITE STATUS REGISTER Operation (SRWD = 1) ................... 76

Figure 43: Hold Timing .................................................................................................................................. 76

Figure 44: Output Timing .............................................................................................................................. 77

Figure 45: VPPH Timing .................................................................................................................................. 77

Figure 46: AC Timing Input/Output Reference Levels ...................................................................................... 79

Figure 47: V-PDFN-8/8mm x 6mm ................................................................................................................. 83

Figure 48: SOP2-16/300 mils .......................................................................................................................... 84

Figure 49: T-PBGA-24b05/6mm x 8mm .......................................................................................................... 85

1.8V, 256Mb: Multiple I/O Serial Flash Memory

Features

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List of Tables

Table 1: Signal Descriptions ........................................................................................................................... 10

Table 2: Sectors[511:0] ................................................................................................................................... 13

Table 3: Data Protection using Device Protocols ............................................................................................. 14

Table 4: Memory Sector Protection Truth Table .............................................................................................. 14

Table 5: Protected Area Sizes – Upper Area ..................................................................................................... 15

Table 6: Protected Area Sizes – Lower Area ...................................................................................................... 15

Table 7: SPI Modes ........................................................................................................................................ 17

Table 8: Extended, Dual, and Quad SPI Protocols ............................................................................................ 19

Table 9: Status Register Bit Definitions ........................................................................................................... 21

Table 10: Nonvolatile Configuration Register Bit Definitions ........................................................................... 22

Table 11: Volatile Configuration Register Bit Definitions .................................................................................. 23

Table 12: Sequence of Bytes During Wrap ....................................................................................................... 24

Table 13: Supported Clock Frequencies – STR ................................................................................................. 24

Table 14: Supported Clock Frequencies – DTR ................................................................................................ 24

Table 15: Extended Address Register Bit Definitions ........................................................................................ 25

Table 16: Enhanced Volatile Configuration Register Bit Definitions .................................................................. 26

Table 17: Flag Status Register Bit Definitions .................................................................................................. 27

Table 18: Command Set ................................................................................................................................. 28

Table 19: Lock Register .................................................................................................................................. 35

Table 20: Data/Address Lines for READ ID and MULTIPLE I/O READ ID Commands ....................................... 38

Table 21: Read ID Data Out ............................................................................................................................ 38

Table 22: Extended Device ID, First Byte ......................................................................................................... 38

Table 23: Serial Flash Discovery Parameter Data Structure .............................................................................. 40

Table 24: Parameter ID .................................................................................................................................. 41

Table 25: Command/Address/Data Lines for READ MEMORY Commands ....................................................... 43

Table 26: Command/Address/Data Lines for READ MEMORY Commands – 4-Byte Address ............................. 45

Table 27: Data/Address Lines for PROGRAM Commands ................................................................................ 53

Table 28: Suspend Parameters ....................................................................................................................... 62

Table 29: Operations Allowed/Disallowed During Device States ...................................................................... 63

Table 30: Reset Command Set ........................................................................................................................ 64

Table 31: OTP Control Byte (Byte 64) .............................................................................................................. 66

Table 32: XIP Confirmation Bit ....................................................................................................................... 70

Table 33: Effects of Running XIP in Different Protocols .................................................................................... 70

Table 34: Power-Up Timing and VWI Threshold ............................................................................................... 73

Table 35: AC RESET Conditions ...................................................................................................................... 74

Table 36: Absolute Ratings ............................................................................................................................. 78

Table 37: Operating Conditions ...................................................................................................................... 78

Table 38: Input/Output Capacitance .............................................................................................................. 78

Table 39: AC Timing Input/Output Conditions ............................................................................................... 79

Table 40: DC Current Characteristics and Operating Conditions ...................................................................... 80

Table 41: DC Voltage Characteristics and Operating Conditions ...................................................................... 80

Table 42: AC Characteristics and Operating Conditions ................................................................................... 81

Table 43: Part Number Information ................................................................................................................ 86

Table 44: Package Details ............................................................................................................................... 87

1.8V, 256Mb: Multiple I/O Serial Flash Memory

Features

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Device Description

The N25Q is the first high-performance multiple input/output serial Flash memory de-

vice manufactured on 65nm NOR technology. It features execute-in-place (XIP) func-

tionality, advanced write protection mechanisms, and a high-speed SPI-compatible bus

interface. The innovative, high-performance, dual and quad input/output instructions

enable double or quadruple the transfer bandwidth for READ and PROGRAM opera-

tions.

Features

The memory is organized as 512 (64KB) main sectors that are further divided into 16

subsectors each (8192 subsectors in total). The memory can be erased one 4KB subsec-

tor at a time, 64KB sectors at a time, or as a whole.

The memory can be write protected by software through volatile and nonvolatile pro-

tection features, depending on the application needs. The protection granularity is of

64KB (sector granularity) for volatile protections

The device has 64 one-time programmable (OTP) bytes that can be read and program-

med with the READ OTP and PROGRAM OTP commands. These 64 bytes can also be

permanently locked with a PROGRAM OTP command.

The device also has the ability to pause and resume PROGRAM and ERASE cycles by us-

ing dedicated PROGRAM/ERASE SUSPEND and RESUME instructions.

3-Byte Address and 4-Byte Address Modes

The device features 3-byte or 4-byte address modes to access memory beyond 128Mb.

When 4-byte address mode is enabled, all commands requiring an address must be en-

tered and exited with a 4-byte address mode command: ENTER 4-BYTE ADDRESS

MODE command and EXIT 4-BYTE ADDRESS MODE command. The 4-byte address

mode can also be enabled through the nonvolatile configuration register. See Registers

for more information.

Operating Protocols

The memory can be operated with three different protocols:

• Extended SPI (standard SPI protocol upgraded with dual and quad operations)

• Dual I/O SPI

• Quad I/O SPI

The standard SPI protocol is extended and enhanced by dual and quad operations. In

addition, the dual SPI and quad SPI protocols improve the data access time and

throughput of a single I/O device by transmitting commands, addresses, and data

across two or four data lines.

Each protocol contains unique commands to perform READ operations in DTR mode.

This enables high data throughput while running at lower clock frequencies.

XIP Mode

XIP mode requires only an address (no instruction) to output data, improving random

access time and eliminating the need to shadow code onto RAM for fast execution.

1.8V, 256Mb: Multiple I/O Serial Flash Memory

Device Description

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HlH

All protocols support XIP operation. For flexibility, multiple XIP entry and exit methods

are available. For applications that must enter XIP mode immediately after powering

up, XIP mode can be set as the default mode through the nonvolatile configuration reg-

ister bits.

Device Configurability

The N25Q family offers additional features that are configured through the nonvolatile

configuration register for default and/or nonvolatile settings. Volatile settings can be

configured through the volatile and volatile-enhanced configuration registers. These

configurable features include the following:

• Number of dummy cycles for the fast READ commands

• Output buffer impedance

• SPI protocol types (extended SPI, DIO-SPI, or QIO-SPI)

• Required XIP mode

• Enabling/disabling HOLD (RESET function)

• Enabling/disabling wrap mode

Figure 1: Logic Diagram

VCC

VSS

DQ0

VPP/W#/DQ2

HOLD#/DQ3

DQ1

RESET2

Note: 1. Reset functionality is available in devices with a dedicated part number. See Part Num-

ber Ordering Information for more details.

1.8V, 256Mb: Multiple I/O Serial Flash Memory

Device Description

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Signal Assignments

Figure 2: 8-Lead, VDFPN8 – MLP8 (Top View)

DQ1

W#/VPP/DQ2

VSS

VCC

HOLD#/DQ3

DQ0

Notes: 1. On the underside of the MLP8 package, there is an exposed central pad that is pulled

internally to VSS and must not be connected to any other voltage or signal line on the

PCB.

2. Reset functionality is available in devices with a dedicated part number. See Part Num-

ber Ordering Information for complete package names and details.

Figure 3: 16-Lead, Plastic Small Outline – SO16 (Top View)

DQ0

DNU

VSS

W#/VPP/DQ2

HOLD#/DQ3

VCC

RESET/DNU2

DNU

DQ1

Notes: 1. Reset functionality is available in devices with a dedicated part number. See Part Num-

ber Ordering Information for complete package names and details.

2. Pin 3 is DNU for devices that do not have the dedicated RESET# pin.

1.8V, 256Mb: Multiple I/O Serial Flash Memory

Signal Assignments

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Figure 4: 24-Ball TBGA (Balls Down)

RESET/NC

VCC

W#/VPP/DQ2

HOLD#/DQ3

VSS

DQ0

DQ1

54321

Note: 1. Reset functionality is available in devices with a dedicated part number. See Part Num-

ber Ordering Information for complete package names and details.

1.8V, 256Mb: Multiple I/O Serial Flash Memory

Signal Assignments

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Signal Descriptions

The signal description table below is a comprehensive list of signals for the N25 family

devices. All signals listed may not be supported on this device. See Signal Assignments

for information specific to this device.

Table 1: Signal Descriptions

Symbol Type Description

C Input Clock: Provides the timing of the serial interface. Commands, addresses, or data present at se-

rial data inputs are latched on the rising edge of the clock. Data is shifted out on the falling

edge of the clock.

S# Input Chip select: When S# is HIGH, the device is deselected and DQ1 is at High-Z. When in exten-

ded SPI mode, with the device deselected, DQ1 is tri-stated. Unless an internal PROGRAM,

ERASE, or WRITE STATUS REGISTER cycle is in progress, the device enters standby power mode

(not deep power-down mode). Driving S# LOW enables the device, placing it in the active pow-

er mode. After power-up, a falling edge on S# is required prior to the start of any command.

DQ0 Input

and I/O

Serial data: Transfers data serially into the device. It receives command codes, addresses, and

the data to be programmed. Values are latched on the rising edge of the clock. DQ0 is used for

input/output during the following operations: DUAL OUTPUT FAST READ, QUAD OUTPUT FAST

READ, DUAL INPUT/OUTPUT FAST READ, and QUAD INPUT/OUTPUT FAST READ. When used for

output, data is shifted out on the falling edge of the clock.

In DIO-SPI, DQ0 always acts as an input/output.

In QIO-SPI, DQ0 always acts as an input/output, with the exception of the PROGRAM or ERASE

cycle performed with VPP. The device temporarily enters the extended SPI protocol and then re-

turns to QIO-SPI as soon as VPP goes LOW.

DQ1 Output

and I/O

Serial data:Transfers data serially out of the device. Data is shifted out on the falling edge of

the clock. DQ1 is used for input/output during the following operations: DUAL INPUT FAST

PROGRAM, QUAD INPUT FAST PROGRAM, DUAL INPUT EXTENDED FAST PROGRAM, and QUAD

INPUT EXTENDED FAST PROGRAM. When used for input, data is latched on the rising edge of

the clock.

In DIO-SPI, DQ1 always acts as an input/output.

In QIO-SPI, DQ1 always acts as an input/output, with the exception of the PROGRAM or ERASE

cycle performed with the enhanced program supply voltage (VPP). In this case the device tem-

porarily enters the extended SPI protocol and then returns to QIO-SPI as soon as VPP goes LOW.

DQ2 Input

and I/O

DQ2: When in QIO-SPI mode or in extended SPI mode using QUAD FAST READ commands, the

signal functions as DQ2, providing input/output.

All data input drivers are always enabled except when used as an output. Micron recommends

customers drive the data signals normally (to avoid unnecessary switching current) and float

the signals before the memory device drives data on them.

DQ3 Input

and I/O

DQ3: When in quad SPI mode or in extended SPI mode using quad FAST READ commands, the

signal functions as DQ3, providing input/output. HOLD# is disabled and RESET# is disabled if

the device is selected.

RESET# Control

Input

RESET: This is a hardware RESET# signal. When RESET# is driven HIGH, the memory is in the

normal operating mode. When RESET# is driven LOW, the memory enters reset mode and out-

put is High-Z. If RESET# is driven LOW while an internal WRITE, PROGRAM, or ERASE operation

is in progress, data may be lost.

1.8V, 256Mb: Multiple I/O Serial Flash Memory

Signal Descriptions

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Table 1: Signal Descriptions (Continued)

Symbol Type Description

HOLD# Control

Input

HOLD: Pauses any serial communications with the device without deselecting the device. DQ1

(output) is High-Z. DQ0 (input) and the clock are "Don't Care." To enable HOLD, the device

must be selected with S# driven LOW.

HOLD# is used for input/output during the following operations: QUAD OUTPUT FAST READ,

QUAD INPUT/OUTPUT FAST READ, QUAD INPUT FAST PROGRAM, and QUAD INPUT EXTENDED

FAST PROGRAM.

In QIO-SPI, HOLD# acts as an I/O (DQ3 functionality), and the HOLD# functionality is disabled

when the device is selected. When the device is deselected (S# is HIGH) in parts with RESET#

functionality, it is possible to reset the device unless this functionality is not disabled by means

of dedicated registers bits.

The HOLD# functionality can be disabled using bit 4 of the NVCR or bit 4 of the VECR.

On devices that include DTR mode capability, the HOLD# functionality is disabled as soon as a

DTR operation is recognized.

W# Control

Input

Write protect: W# can be used as a protection control input or in QIO-SPI operations. When in

extended SPI with single or dual commands, the WRITE PROTECT function is selectable by the

voltage range applied to the signal. If voltage range is low (0V to VCC), the signal acts as a

write protection control input. The memory size protected against PROGRAM or ERASE opera-

tions is locked as specified in the status register block protect bits 3:0.

W# is used as an input/output (DQ2 functionality) during QUAD INPUT FAST READ and QUAD

INPUT/OUTPUT FAST READ operations and in QIO-SPI.

VPP Power Supply voltage: If VPP is in the voltage range of VPPH, the signal acts as an additional power

supply, as defined in the AC Measurement Conditions table.

During QIFP, QIEFP, and QIO-SPI PROGRAM/ERASE operations, it is possible to use the addition-

al VPP power supply to speed up internal operations. However, to enable this functionality, it is

necessary to set bit 3 of the VECR to 0.

In this case, VPP is used as an I/O until the end of the operation. After the last input data is shif-

ted in, the application should apply VPP voltage to VPP within 200ms to speed up the internal

operations. If the VPP voltage is not applied within 200ms, the PROGRAM/ERASE operations

start at standard speed.

The default value of VECR bit 3 is 1, and the VPP functionality for quad I/O modify operations is

disabled.

VCC Power Device core power supply: Source voltage.

VSS Ground Ground: Reference for the VCC supply voltage.

DNU – Do not use.

NC – No connect.

1.8V, 256Mb: Multiple I/O Serial Flash Memory

Signal Descriptions

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ﬂcron‘ Y demder ooooooon <7 256="" bytes="" (p="" x="" decod="">

Memory Organization

Memory Configuration and Block Diagram

Each page of memory can be individually programmed. Bits are programmed from one

through zero. The device is subsector, sector, or bulk-erasable, but not page-erasable.

Bits are erased from zero through one. The memory is configured as 33,554,432 bytes (8

bits each); 512 sectors (64KB each); 8192 subsectors (4KB each); and 131,072 pages (256

bytes each); and 64 OTP bytes are located outside the main memory array.

Figure 5: Block Diagram

HOLD#

W#/VPP Control logic High voltage

generator

I/O shift register

Address register

and counter

256 byte

data buffer

256 bytes (page size)

X decoder

Y decoder

Status

0000000h

01FFFFFFh

00000FFh

64 OTP bytes

DQ0

DQ1

DQ2

DQ3

1.8V, 256Mb: Multiple I/O Serial Flash Memory

Memory Organization

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Memory Map – 256Mb Density

Table 2: Sectors[511:0]

Sector Subsector

Address Range

Start End

511 8191 01FF F000h 01FF FFFFh

⋮ ⋮ ⋮

8176 01FF 0000h 01FF 0FFFh

⋮ ⋮ ⋮ ⋮

255 4095 00FF F000h 00FF FFFFh

⋮ ⋮ ⋮

4080 00FF 0000h 00FF 0FFFh

⋮ ⋮ ⋮ ⋮

127 2047 007F F000h 007F FFFFh

⋮ ⋮ ⋮

2032 007F 0000h 007F 0FFFh

⋮ ⋮ ⋮ ⋮

63 1023 003F F000h 003F FFFFh

⋮ ⋮ ⋮

1008 003F 0000h 003F 0FFFh

⋮ ⋮ ⋮ ⋮

0 15 0000 F000h 0000 FFFFh

⋮ ⋮ ⋮

0 0000 0000h 0000 0FFFh

1.8V, 256Mb: Multiple I/O Serial Flash Memory

Memory Map – 256Mb Density

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Device Protection

Table 3: Data Protection using Device Protocols

Note 1 applies to the entire table

Protection by: Description

Power-on reset and internal timer Protects the device against inadvertent data changes while the power supply is out-

side the operating specification.

Command execution check Ensures that the number of clock pulses is a multiple of one byte before executing a

PROGRAM or ERASE command, or any command that writes to the device registers.

WRITE ENABLE operation Ensures that commands modifying device data must be preceded by a WRITE ENABLE

command, which sets the write enable latch bit in the status register.

Note: 1. Extended, dual, and quad SPI protocol functionality ensures that device data is protec-

ted from excessive noise.

Table 4: Memory Sector Protection Truth Table

Note 1 applies to the entire table

Sector Lock Register

Memory Sector Protection Status

Sector Lock

Down Bit

Sector Write Lock

Bit

0 0 Sector unprotected from PROGRAM and ERASE operations. Protection status re-

versible.

0 1 Sector protected from PROGRAM and ERASE operations. Protection status rever-

sible.

1 0 Sector unprotected from PROGRAM and ERASE operations. Protection status not

reversible except by power cycle or reset.

1 1 Sector protected from PROGRAM and ERASE operations. Protection status not

reversible except by power cycle or reset.

Note: 1. Sector lock register bits are written to when the WRITE LOCK REGISTER command is exe-

cuted. The command will not execute unless the sector lock down bit is cleared (see the

WRITE LOCK REGISTER command). The sector lock register is programmed to have all

protection registers activated at power-up.

1.8V, 256Mb: Multiple I/O Serial Flash Memory

Device Protection

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ﬂcron'

Block Protection Areas

Table 5: Protected Area Sizes – Upper Area

Note 1 applies to the entire table

Status Register Content Memory Content

Top/

Bottom

Bit BP3 BP2 BP1 BP0 Protected Area Unprotected Area

0 0 0 0 0 None All sectors

0 0 0 0 1 Sector 511 Sectors (0 to 510)

0 0 0 1 0 Sectors (510 to 511) Sectors (0 to 509)

0 0 0 1 1 Sectors (508 to 511) Sectors (0 to 507)

0 0 1 0 0 Sectors (504 to 511) Sectors (0 to 503)

0 0 1 0 1 Sectors (496 to 511) Sectors (0 to 495)

0 0 1 1 0 Sectors (480 to 511) Sectors (0 to 479)

0 0 1 1 1 Sectors (448 to 511) Sectors (0 to 447)

0 1 0 0 0 Sectors (384 to 511) Sectors (0 to 383)

0 1 0 0 1 Sectors (256 to 511) Sectors (0 to 255)

0 1 0 1 0 All sectors None

0 1 0 1 1 All sectors None

0 1 1 0 0 All sectors None

0 1 1 0 1 All sectors None

0 1 1 1 0 All sectors None

0 1 1 1 1 All sectors None

Note: 1. See the Status Register for details on the top/bottom bit and the BP 3:0 bits.

Table 6: Protected Area Sizes – Lower Area

Note 1 applies to the entire table

Status Register Content Memory Content

Top/

Bottom

Bit BP3 BP2 BP1 BP0 Protected Area Unprotected Area

1 0 0 0 0 None All sectors

1 0 0 0 1 Sector 0 Sectors (1 to 511)

1 0 0 1 0 Sectors (0 to 1) Sectors (2 to 511)

1 0 0 1 1 Sectors (0 to 3) Sectors (4 to 511)

1 0 1 0 0 Sectors (0 to 7) Sectors (8 to 511)

1 0 1 0 1 Sectors (0 to 15) Sectors (16 to 511)

1 0 1 1 0 Sectors (0 to 31) Sectors (32 to 511)

1 0 1 1 1 Sectors (0 to 63) Sectors (64 to 511)

1 1 0 0 0 Sectors (0 to 127) Sectors (128 to 511)

1.8V, 256Mb: Multiple I/O Serial Flash Memory

Device Protection

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Table 6: Protected Area Sizes – Lower Area (Continued)

Note 1 applies to the entire table

Status Register Content Memory Content

Top/

Bottom

Bit BP3 BP2 BP1 BP0 Protected Area Unprotected Area

1 1 0 0 1 Sectors (0 to 255) Sectors (256 to 511)

1 1 0 1 0 All sectors None

1 1 0 1 1 All sectors None

1 1 1 0 0 All sectors None

1 1 1 0 1 All sectors None

1 1 1 1 0 All sectors None

1 1 1 1 1 All sectors None

Note: 1. See the Status Register for details on the top/bottom bit and the BP 3:0 bits.

1.8V, 256Mb: Multiple I/O Serial Flash Memory

Device Protection

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Serial Peripheral Interface Modes

The device can be driven by a microcontroller while its serial peripheral interface is in

either of the two modes shown here. The difference between the two modes is the clock

polarity when the bus master is in standby mode and not transferring data. Input data is

latched in on the rising edge of the clock, and output data is available from the falling

edge of the clock.

Table 7: SPI Modes

Note 1 applies to the entire table

SPI Modes Clock Polarity

CPOL = 0, CPHA = 0 C remains at 0 for (CPOL = 0, CPHA = 0)

CPOL = 1, CPHA = 1 C remains at 1 for (CPOL = 1, CPHA = 1)

Note: 1. The listed SPI modes are supported in extended, dual, and quad SPI protocols.

Shown below is an example of three memory devices in extended SPI protocol in a sim-

ple connection to an MCU on an SPI bus. Because only one device is selected at a time,

that one device drives DQ1, while the other devices are High-Z.

Resistors ensure the device is not selected if the bus master leaves S# High-Z. The bus

master might enter a state in which all input/output is High-Z simultaneously, such as

when the bus master is reset. Therefore, the serial clock must be connected to an exter-

nal pull-down resistor so that S# is pulled HIGH while the serial clock is pulled LOW.

This ensures that S# and the serial clock are not HIGH simultaneously and that tSHCH

is met. The typical resistor value of 100kΩ, assuming that the time constant R × Cp (Cp =

parasitic capacitance of the bus line), is shorter than the time the bus master leaves the

SPI bus in High-Z.

Example: Cp = 50pF, that is R × Cp = 5μs. The application must ensure that the bus mas-

ter never leaves the SPI bus High-Z for a time period shorter than 5μs. W# and HOLD#

should be driven either HIGH or LOW, as appropriate.

1.8V, 256Mb: Multiple I/O Serial Flash Memory

Serial Peripheral Interface Modes

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Figure 6: Bus Master and Memory Devices on the SPI Bus

SPI bus master

SPI memory

device

SDO

SDI

SCK

DQ1 DQ0

SPI memory

device

DQ1 DQ0

SPI memory

device

DQ1 DQ0

CS3 CS2 CS1

SPI interface:

(CPOL, CPHA) =

(0, 0) or (1, 1)

W# HOLD# S# W# HOLD# S# W# HOLD#

R R R

VCC

VCC VCC VCC

VSS

VSS VSS VSS

Figure 7: SPI Modes

DQ0

DQ1

CPHA

CPOL

MSB

1.8V, 256Mb: Multiple I/O Serial Flash Memory

Serial Peripheral Interface Modes

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SPI Protocols

Table 8: Extended, Dual, and Quad SPI Protocols

Protocol

Name

Com-

mand

Input

Address

Input

Data

Input/Output Description

Extended DQ0 Multiple DQn

lines, depending

on the command

Multiple DQn

lines, depending

on the command

Device default protocol from the factory. Additional com-

mands extend the standard SPI protocol and enable address

or data transmission on multiple DQn lines.

Dual DQ[1:0] DQ[1:0] DQ[1:0] Volatile selectable: When the enhanced volatile configu-

ration register bit 6 is set to 0 and bit 7 is set to 1, the de-

vice enters the dual SPI protocol immediately after the

WRITE ENHANCED VOLATILE CONFIGURATION REGISTER

command. The device returns to the default protocol after

the next power-on. In addition, the device can return to de-

fault protocol using the rescue sequence or through new

WRITE ENHANCED VOLATILE CONFIGURATION REGISTER

command, without power-off or power-on.

Nonvolatile selectable: When nonvolatile configuration

after the next power-on. Once this register bit is set, the de-

vice defaults to the dual SPI protocol after all subsequent

power-on sequences until the nonvolatile configuration

Quad1DQ[3:0] DQ[3:0] DQ[3:0] Volatile selectable: When the enhanced volatile configu-

ration register bit 7 is set to 0, the device enters the quad

SPI protocol immediately after the WRITE ENHANCED VOL-

ATILE CONFIGURATION REGISTER command. The device re-

turns to the default protocol after the next power-on. In ad-

dition, the device can return to default protocol using the

rescue sequence or through new WRITE ENHANCED VOLA-

TILE CONFIGURATION REGISTER command, without power-

off or power-on.

Nonvolatile selectable: When nonvolatile configuration

tocol after the next power-on. Once this register bit is set,

the device defaults to the quad SPI protocol after all subse-

quent power-on sequences until the nonvolatile configura-

tion register bit is reset to 1.

Note: 1. In quad SPI protocol, all command/address input and data I/O are transmitted on four

lines except during a PROGRAM and ERASE cycle performed with VPP. In this case, the

device enters the extended SPI protocol to temporarily allow the application to perform

a PROGRAM/ERASE SUSPEND operation or to check the write-in-progress bit in the sta-

tus register or the program/erase controller bit in the flag status register. Then, when

VPP goes LOW, the device returns to the quad SPI protocol.

1.8V, 256Mb: Multiple I/O Serial Flash Memory

SPI Protocols

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Nonvolatile and Volatile Registers

The device features the following volatile and nonvolatile registers that users can access

to store device parameters and operating configurations:

• Status register

• Nonvolatile and volatile configuration registers

• Extended address register

• Enhanced volatile configuration register

• Flag status register

• Lock register

Note: The lock register is defined in READ LOCK REGISTER Command.

The working condition of memory is set by an internal configuration register that is not

directly accessible to users. As shown below, parameters in the internal configuration

phase or power-on reset. In this sense, then, the nonvolatile configuration register con-

tains the default settings of memory.

Also, during the life of an application, each time a WRITE VOLATILE or ENHANCED

VOLATILE CONFIGURATION REGISTER command executes to set configuration pa-

rameters in these respective registers, these new settings are copied to the internal con-

figuration register. Therefore, memory settings can be changed in real time. However, at

the next power-on reset, the memory boots according to the memory settings defined

in the nonvolatile configuration register parameters.

Figure 8: Internal Configuration Register

the power-on phase or after a reset,

overwriting configuration register settings

on the internal configuration register.

WRITE VOLATILE OR ENHANCED VOLATILE

CONFIGURATION REGISTER command,

overwriting configuration register

settings on the internal configuration register.

Nonvolatile configuration register

Internal configuration

Device behavior

Volatile configuration register and

enhanced volatile configuration register

1.8V, 256Mb: Multiple I/O Serial Flash Memory

Nonvolatile and Volatile Registers

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Status Register

Table 9: Status Register Bit Definitions

Note 1 applies to entire table

Bit Name Settings Description Notes

7 Status register

write enable/disable

0 = Enabled

1 = Disabled

Nonvolatile bit: Used with the W/VPP signal to enable or

disable writing to the status register.

5 Top/bottom 0 = Top

1 = Bottom

Nonvolatile bit: Determines whether the protected mem-

ory area defined by the block protect bits starts from the

top or bottom of the memory array.

6, 4:2 Block protect 3–0 See Protected Area

Sizes – Upper Area

and Lower Area ta-

bles in Device Pro-

tection

Nonvolatile bit: Defines memory to be software protec-

ted against PROGRAM or ERASE operations. When one or

more block protect bits is set to 1, a designated memory

area is protected from PROGRAM and ERASE operations.

1 Write enable latch 0 = Cleared (Default)

1 = Set

Volatile bit: The device always powers up with this bit

cleared to prevent inadvertent WRITE STATUS REGISTER,

PROGRAM, or ERASE operations. To enable these opera-

tions, the WRITE ENABLE operation must be executed first

to set this bit.

0 Write in progress 0 = Ready

1 = Busy

Volatile bit: Indicates if one of the following command cy-

cles is in progress:

WRITE STATUS REGISTER

WRITE NONVOLATILE CONFIGURATION REGISTER

PROGRAM

ERASE

Notes: 1. Bits can be read from or written to using READ STATUS REGISTER or WRITE STATUS REG-

ISTER commands, respectively.

2. Volatile bits are cleared to 0 by a power cycle or reset.

3. The status register write enable/disable bit, combined with the W#/VPP signal as descri-

bed in the Signal Descriptions, provides hardware data protection for the device as fol-

lows: When the enable/disable bit is set to 1, and the W#/VPP signal is driven LOW, the

status register nonvolatile bits become read-only and the WRITE STATUS REGISTER oper-

ation will not execute. The only way to exit this hardware-protected mode is to drive

W#/VPP HIGH.

4. See Protected Area Sizes tables. The BULK ERASE command is executed only if all bits

are 0.

Nonvolatile and Volatile Configuration Registers

1.8V, 256Mb: Multiple I/O Serial Flash Memory

Nonvolatile and Volatile Registers

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Table 10: Nonvolatile Configuration Register Bit Definitions

Note 1 applies to entire table

Bit Name Settings Description Notes

15:12 Number of

dummy clock

cycles

0000 (identical to 1111)

0001

0010

1101

1110

1111

Sets the number of dummy clock cycles subse-

quent to all FAST READ commands.

The default setting targets the maximum al-

lowed frequency and guarantees backward com-

patibility.

2, 3

11:9 XIP mode at

power-on re-

set

000 = XIP: Fast Read

001 = XIP: Dual Output Fast Read

010 = XIP: Dual I/O Fast Read

011 = XIP: Quad Output Fast Read

100 = XIP: Quad I/O Fast Read

101 = Reserved

110 = Reserved

111 = Disabled (Default)

Enables the device to operate in the selected XIP

mode immediately after power-on reset.

8:6 Output driver

strength

000 = Reserved

001 = 90 Ohms

010 = 60 Ohms

011 = 45 Ohms

100 = Reserved

101 = 20 Ohms

110 = 15 Ohms

111 = 30 (Default)

Optimizes impedance at VCC/2 output voltage.

5 Reserved X "Don't Care."

4 Reset/hold 0 = Disabled

1 = Enabled (Default)

Enables or disables hold or reset.

(Available on dedicated part numbers.)

3 Quad I/O pro-

tocol

0 = Enabled

1 = Disabled (Default, Extended SPI pro-

tocol)

Enables or disables quad I/O protocol. 4

2 Dual I/O pro-

tocol

0 = Enabled

1 = Disabled (Default, Extended SPI pro-

tocol)

Enables or disables dual I/O protocol. 4

1 128Mb seg-

ment select

0 = Upper 128Mb segment

1 = Lower 128Mb segment (Default)

Selects a 128Mb segment as default for 3B ad-

dress operations. See also the extended address

0 Address bytes 0 = Enable 4B address

1 = Enable 3B address (Default)

Defines the number of address bytes for a com-

mand.

Notes: 1. Settings determine device memory configuration after power-on. The device ships from

the factory with all bits erased to 1 (FFFFh). The register is read from or written to by

READ NONVOLATILE CONFIGURATION REGISTER or WRITE NONVOLATILE CONFIGURA-

TION REGISTER commands, respectively.

2. The 0000 and 1111 settings are identical in that they both define the default state,

which is the maximum frequency of fc = 108 MHz. This ensures backward compatibility.

1.8V, 256Mb: Multiple I/O Serial Flash Memory

Nonvolatile and Volatile Registers

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3. If the number of dummy clock cycles is insufficient for the operating frequency, the

memory reads wrong data. The number of cycles must be set according to and sufficient

for the clock frequency, which varies by the type of FAST READ command, as shown in

the Supported Clock Frequencies table.

4. If bits 2 and 3 are both set to 0, the device operates in quad I/O. When bits 2 or 3 are

reset to 0, the device operates in dual I/O or quad I/O respectively, after the next power-

on.

Table 11: Volatile Configuration Register Bit Definitions

Note 1 applies to entire table

Bit Name Settings Description Notes

7:4 Number of dum-

my clock cycles

0000 (identical to 1111)

0001

0010

1101

1110

1111

Sets the number of dummy clock cycles subsequent to

all FAST READ commands.

The default setting targets maximum allowed frequen-

cy and guarantees backward compatibility.

2, 3

3 XIP 0

Enables or disables XIP. For device part numbers with

feature digit equal to 2 or 4, this bit is always "Don’t

Care," so the device operates in XIP mode without set-

ting this bit.

2 Reserved x = Default 0b = Fixed value.

1:0 Wrap 00 = 16-byte boundary

aligned

16-byte wrap: Output data wraps within an aligned 16-

byte boundary starting from the 3-byte address issued

after the command code.

01 = 32-byte boundary

aligned

32-byte wrap: Output data wraps within an aligned 32-

byte boundary starting from the 3-byte address issued

after the command code.

10 = 64-byte boundary

aligned

64-byte wrap: Output data wraps within an aligned 64-

byte boundary starting from the 3-byte address issued

after the command code.

11 = sequential (default) Continuous reading (default): All bytes are read se-

quentially.

Notes: 1. Settings determine the device memory configuration upon a change of those settings by

the WRITE VOLATILE CONFIGURATION REGISTER command. The register is read from or

written to by READ VOLATILE CONFIGURATION REGISTER or WRITE VOLATILE CONFIGU-

RATION REGISTER commands respectively.

2. The 0000 and 1111 settings are identical in that they both define the default state,

which is the maximum frequency of fc = 108 MHz. This ensures backward compatibility.

3. If the number of dummy clock cycles is insufficient for the operating frequency, the

memory reads wrong data. The number of cycles must be set according to and be suffi-

cient for the clock frequency, which varies by the type of FAST READ command, as

shown in the Supported Clock Frequencies table.

4. See the Sequence of Bytes During Wrap table.

1.8V, 256Mb: Multiple I/O Serial Flash Memory

Nonvolatile and Volatile Registers

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ﬂcron'

Table 12: Sequence of Bytes During Wrap

Starting Address 16-Byte Wrap 32-Byte Wrap 64-Byte Wrap

0 0-1-2- . . . -15-0-1- . . 0-1-2- . . . -31-0-1- . . 0-1-2- . . . -63-0-1- . .

1 1-2- . . . -15-0-1-2- . . 1-2- . . . -31-0-1-2- . . 1-2- . . . -63-0-1-2- . .

15 15-0-1-2-3- . . . -15-0-1- . . 15-16-17- . . . -31-0-1- . . 15-16-17- . . . -63-0-1- . .

31 31-16-17- . . . -31-16-17- . . 31-0-1-2-3- . . . -31-0-1- . . 31-32-33- . . . -63-0-1- . .

63 63-48-49- . . . -63-48-49- . . 63-32-33- . . . -63-32-33- . . 63-0-1- . . . -63-0-1- . .

Table 13: Supported Clock Frequencies – STR

Note 1 applies to entire table

Number of Dummy

Clock Cycles FAST READ

DUAL OUTPUT

FAST READ

DUAL I/O FAST

READ

QUAD OUTPUT

FAST READ

QUAD I/O FAST

READ

1 90 80 50 60 30

2 100 90 70 75 40

3 108 100 80 90 50

4 108 105 90 100 60

5 108 108 100 94 70

6 108 108 105 105 80

7 108 108 108 108 86

8 108 108 108 108 95

9 108 108 108 108 105

10 108 108 108 108 108

Note: 1. Values are guaranteed by characterization and not 100% tested in production.

Table 14: Supported Clock Frequencies – DTR

Number of Dummy

Clock Cycles FAST READ

DUAL OUTPUT

FAST READ

DUAL I/O FAST

READ

QUAD OUTPUT

FAST READ

QUAD I/O FAST

READ

1 45 40 25 30 15

2 50 45 35 38 20

3 54 50 40 45 25

4 54 53 45 47 30

5 54 54 50 50 35

6 54 54 53 53 40

7 54 54 54 54 43

8 54 54 54 54 48

9 54 54 54 54 53

10 54 54 54 54 54

1.8V, 256Mb: Multiple I/O Serial Flash Memory

Nonvolatile and Volatile Registers

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Extended Address Register

For devices whose A[MAX:MIN] equals A[23:0], N25Q includes an extended address reg-

ister that provides a fourth address byte A[31:24], enabling access to memory beyond

128Mb. Extended address register bit 0 is used to select the upper 128Mb segment or

the lower 128Mb segment of the memory array.

Figure 9: Upper and Lower 128Mb Memory Array Segments

Upper 128Mb EAR<0> = A<24> = 1

EAR<0> = A<24> = 0

01FFFFFFh

01000000h

Bottom 128Mb 00FFFFFFh

00000000h

The PROGRAM and ERASE operations act upon the 128Mb segment selected in the ex-

tended address register.

The BULK ERASE operation erases the entire device.

The READ operation begins reading in the selected 128Mb segment, but is not bound

by it. In a continuous READ, when the last byte of the segment is read, the next byte out-

put is the first byte of the other segment as the operation wraps to 0000000h; Therefore,

a download of the whole array is possible with one READ operation. The value of the

extended address register does not change when a READ operation crosses the selected

128Mb boundary.

Table 15: Extended Address Register Bit Definitions

Bit Name Settings Description

7 A[31:25] 0 = Reserved –

0 A[24] 0 = Lower 128Mb segment (default)

1 = Upper 128Mb segment

Enables 128Mb segmentation selection. The default setting for

this bit is determined by the nonvolatile configuration register

bit 1. However, this setting can be changed with the WRITE EX-

TENDED ADDRESS REGISTER command.

Note: 1. Bit 0 enables 128Mb segmentation selection. If 4-byte addressing is enabled, extended

address register settings are ignored.

1.8V, 256Mb: Multiple I/O Serial Flash Memory

Nonvolatile and Volatile Registers

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Enhanced Volatile Configuration Register

Table 16: Enhanced Volatile Configuration Register Bit Definitions

Note 1 applies to entire table

Bit Name Settings Description Notes

7 Quad I/O protocol 0 = Enabled

1 = Disabled (Default,

extended SPI protocol)

Enables or disables quad I/O protocol. 2

6 Dual I/O protocol 0 = Enabled

1 = Disabled (Default,

extended SPI protocol)

Enables or disables dual I/O protocol. 2

5 Reserved x = Default 0b = Fixed value.

4 Reset/hold 0 = Disabled

1 = Enabled (Default)

Enables or disables hold or reset.

(Available on dedicated part numbers.)

3 VPP accelerator 0 = Enabled

1 = Disabled (Default)

Enables or disables VPP acceleration for QUAD

INPUT FAST PROGRAM and QUAD INPUT EX-

TENDED FAST PROGRAM OPERATIONS.

2:0 Output driver strength 000 = Reserved

001 = 90 Ohms

010 = 60 Ohms

011 = 45 Ohms

100 = Reserved

101 = 20 Ohms

110 = 15 Ohms

111 = 30 (Default)

Optimizes impedance at VCC/2 output voltage.

Notes: 1. Settings determine the device memory configuration upon a change of those settings by

the WRITE ENHANCED VOLATILE CONFIGURATION REGISTER command. The register is

read from or written to in all protocols by READ ENHANCED VOLATILE CONFIGURATION

tively.

2. If bits 6 and 7 are both set to 0, the device operates in quad I/O. When either bit 6 or 7 is

reset to 0, the device operates in dual I/O or quad I/O respectively following the next

WRITE ENHANCED VOLATILE CONFIGURATION command.

1.8V, 256Mb: Multiple I/O Serial Flash Memory

Nonvolatile and Volatile Registers

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Flag Status Register

Table 17: Flag Status Register Bit Definitions

Note 1 applies to entire table

Bit Name Settings Description Notes

7 Program or

erase

controller

0 = Busy

1 = Ready

Status bit: Indicates whether a PROGRAM, ERASE,

WRITE STATUS REGISTER, or WRITE NONVOLATILE CON-

FIGURATION command cycle is in progress.

2, 3

6 Erase suspend 0 = Not in effect

1 = In effect

Status bit: Indicates whether an ERASE operation has

been or is going to be suspended.

5 Erase 0 = Clear

1 = Failure or protection error

Error bit: Indicates whether an ERASE operation has

succeeded or failed.

4, 5

4 Program 0 = Clear

1 = Failure or protection error

Error bit: Indicates whether a PROGRAM operation has

succeeded or failed. Also indicates an attempt to pro-

gram a 0 to a 1 when VPP = VPPH and the data pattern is

a multiple of 64 bits.

4, 5

3 VPP 0 = Enabled

1 = Disabled (Default)

Error bit: Indicates an invalid voltage on VPP during a

PROGRAM or ERASE operation.

4, 5

2 Program sus-

pend

0 = Not in effect

1 = In effect

Status bit: Indicates whether a PROGRAM operation

has been or is going to be suspended.

1 Protection 0 = Clear

1 = Failure or protection error

Error bit: Indicates whether a PROGRAM or ERASE op-

eration has attempted to modify the protected array

sector. Also indicates whether a PROGRAM operation

has attempted to access the locked OTP space.

4, 5

0 Addressing 0 = 3 bytes addressing

1 = 4 bytes addressing

Status bit: Indicates whether 3-byte or 4-byte address

mode is enabled.

Notes: 1. Register bits are read by READ STATUS REGISTER command. All bits are volatile.

2. These program/erase controller settings apply only to PROGRAM or ERASE command cy-

cles in progress; they do not apply to a WRITE command cycle in progress.

3. Status bits are reset automatically.

4. Error bits must be reset by CLEAR FLAG STATUS REGISTER command.

5. Typical errors include operation failures and protection errors caused by issuing a com-

mand before the error bit has been reset to 0.

1.8V, 256Mb: Multiple I/O Serial Flash Memory

Nonvolatile and Volatile Registers

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ﬂcron'

Command Definitions

Table 18: Command Set

Note 1 applies to entire table

Command Code Extended

Dual

I/O

Quad

I/O

Data

Bytes Notes

RESET Operations

RESET ENABLE 66h Yes Yes Yes 0 2

RESET MEMORY 99h

IDENTIFICATION Operations

READ ID 9E/9Fh Yes No No 1 to 20 2

MULTIPLE I/O READ ID AFh No Yes Yes 1 to 3 2

READ SERIAL FLASH

DISCOVERY PARAMETER

5Ah Yes Yes Yes 1 to ∞3

READ Operations

READ 03h Yes No No 1 to ∞4

FAST READ 0Bh Yes Yes Yes 5

DUAL OUTPUT FAST READ 3Bh Yes Yes No 1 to ∞5

DUAL INPUT/OUTPUT FAST READ 0Bh

3Bh

BBh

Yes Yes No 5, 11

QUAD OUTPUT FAST READ 6Bh Yes No Yes 1 to ∞5

QUAD INPUT/OUTPUT FAST READ 0Bh

6Bh

EBh

Yes No Yes 5, 12

FAST READ – DTR 0Dh Yes Yes Yes 1 to ∞6

DUAL OUTPUT FAST READ – DTR 3Dh Yes Yes No 1 to ∞6

DUAL INPUT/OUTPUT FAST READ – DTR 0Dh

3Dh

BDh

Yes Yes No 1 to ∞6

QUAD OUTPUT FAST READ – DTR 6Dh Yes No Yes 1 to ∞6

QUAD INPUT/OUTPUT FAST READ – DTR 0Dh

6Dh

EDh

Yes No Yes 1 to ∞7

4-BYTE READ 13h Yes Yes Yes 1 to ∞8

4-BYTE FAST READ 0Ch 9

4-BYTE DUAL OUTPUT FAST READ 3Ch Yes Yes No 1 to ∞9

4-BYTE DUAL INPUT/OUTPUT FAST

READ

BCh Yes Yes No 9, 11

4-BYTE QUAD OUTPUT FAST READ 6Ch Yes No Yes 1 to ∞9

4-BYTE QUAD INPUT/OUTPUT FAST

READ

ECh Yes No Yes 10, 12

WRITE Operations

1.8V, 256Mb: Multiple I/O Serial Flash Memory

Command Definitions

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ﬂcron'

Table 18: Command Set (Continued)

Note 1 applies to entire table

Command Code Extended

Dual

I/O

Quad

I/O

Data

Bytes Notes

WRITE ENABLE 06h Yes Yes Yes 0 2

WRITE DISABLE 04h

READ STATUS REGISTER 05h Yes Yes Yes 1 to ∞2

WRITE STATUS REGISTER 01h 1 2, 13

READ LOCK REGISTER E8h Yes Yes Yes 1 to ∞4

WRITE LOCK REGISTER E5h 1 4, 13

READ FLAG STATUS REGISTER 70h Yes Yes Yes 1 to ∞2

CLEAR FLAG STATUS REGISTER 50h 0

READ NONVOLATILE

CONFIGURATION REGISTER

B5h Yes Yes Yes 2 2

WRITE NONVOLATILE

CONFIGURATION REGISTER

B1h 2, 13

READ VOLATILE

CONFIGURATION REGISTER

85h Yes Yes Yes 1 to ∞2

WRITE VOLATILE

CONFIGURATION REGISTER

81h 1 2, 13

READ ENHANCED VOLATILE

CONFIGURATION REGISTER

65h Yes Yes Yes 1 to ∞2

WRITE ENHANCED VOLATILE

CONFIGURATION REGISTER

61h 1 2, 13

READ EXTENDED ADDRESS REGISTER C8h Yes Yes Yes 1 to ∞2

WRITE EXTENDED ADDRESS REGISTER C5h 1 2, 14

PROGRAM Operations

PAGE PROGRAM 02h Yes Yes Yes 1 to 256 4, 13

4-BYTE PAGE PROGRAM 12h Yes Yes Yes 1 to 256 4, 13, 15

DUAL INPUT FAST PROGRAM A2h Yes Yes No 1 to 256 4, 13

EXTENDED DUAL INPUT

FAST PROGRAM

02h

A2h

D2h

Yes Yes No 4, 11, 13

QUAD INPUT FAST PROGRAM 32h Yes No Yes 1 to 256 4, 13

4-BYTE QUAD INPUT FAST PROGRAM 34h Yes No Yes 4, 13, 15

EXTENDED QUAD INPUT

FAST PROGRAM

02h

32h

12h/38h

Yes No Yes 4, 12, 13, 16

ERASE Operations

SUBSECTOR ERASE 20h Yes Yes Yes 0 4, 13

4-BYTE SUBSECTOR ERASE 21h 4, 13, 15

1.8V, 256Mb: Multiple I/O Serial Flash Memory

Command Definitions

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Table 18: Command Set (Continued)

Note 1 applies to entire table

Command Code Extended

Dual

I/O

Quad

I/O

Data

Bytes Notes

SECTOR ERASE D8h Yes Yes Yes 0 4, 13

4-BYTE SECTOR ERASE DCh 4, 13, 15

BULK ERASE C7h Yes Yes Yes 0 4, 13

PROGRAM/ERASE RESUME 7Ah Yes Yes Yes 0 2, 13

PROGRAM/ERASE SUSPEND 75h

ONE-TIME PROGRAMMABLE (OTP) Operations

READ OTP ARRAY 4Bh Yes Yes Yes 1 to 64 5

PROGRAM OTP ARRAY 42h 4, 13

4-BYTE ADDRESS MODE Operations

ENTER 4-BYTE ADDRESS MODE B7h Yes Yes Yes 0 2, 14

EXIT 4-BYTE ADDRESS MODE E9h

QUAD Operations

ENTER QUAD 35h Yes Yes Yes 0 2, 15

EXIT QUAD F5h 2, 15

DEEP POWER-DOWN Operations

ENTER DEEP POWER-DOWN B9h Yes Yes Yes 0 2

RELEASE from DEEP POWER-DOWN ABh

Notes: 1. Yes in the protocol columns indicates that the command is supported and has the same

functionality and command sequence as other commands marked Yes.

2. Address bytes = 0. Dummy clock cycles = 0.

3. Address bytes = 3. Dummy clock cycles default = 8.

4. Address bytes default = 3; address bytes = 4 (extended address). Dummy clock cycles = 0.

5. Address bytes default = 3; address bytes = 4 (extended address). Dummy clock cycles de-

fault = 8. Dummy clock cycles default = 10 (when quad SPI protocol is enabled). Dummy

clock cycles are configurable by the user.

6. Address bytes default = 3; address bytes = 4 (extended address). Dummy clock cycles de-

fault = 6. Dummy clock cycles default = 8 when quad SPI protocol is enabled. Dummy

clock cycles are configurable by the user.

7. Address bytes default = 3; address bytes = 4 (extended address). Dummy clock cycles de-

fault = 8. Dummy clock cycles are configurable by the user.

8. Address bytes = 4. Dummy clock cycles = 0.

9. Address bytes = 4. Dummy clock cycles default = 8. Dummy clock cycles default = 10

(when quad SPI protocol is enabled). Dummy clock cycles are configurable by the user.

10. Address bytes = 4. Dummy clock cycles default = 10. Dummy clock cycles is configurable

by the user.

11. When the device is in dual SPI protocol, the command can be entered with any of these

three codes. The different codes enable compatibility between dual SPI and extended

SPI protocols.

12. When the device is in quad SPI protocol, the command can be entered with any of these

three codes. The different codes enable compatibility between quad SPI and extended

SPI protocols.

1.8V, 256Mb: Multiple I/O Serial Flash Memory

Command Definitions

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13. The WRITE ENABLE command must be issued first before this command can be execu-

ted.

14. Except for line items that enable the additional RESET# pin, the WRITE ENABLE com-

mand must be issued first before this command can be executed.

15. These commands are only available for line items that enable the additional RESET# pin.

16. The code 38h is only valid for line items that enable the additional RESET# pin; other-

wise, code 12h is valid.

1.8V, 256Mb: Multiple I/O Serial Flash Memory

Command Definitions

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Extended 7D

READ REGISTER and WRITE REGISTER Operations

READ STATUS REGISTER or FLAG STATUS REGISTER Command

To initiate a READ STATUS REGISTER command, S# is driven LOW. For extended SPI

protocol, the command code is input on DQ0, and output on DQ1. For dual SPI proto-

col, the command code is input on DQ[1:0], and output on DQ[1:0]. For quad SPI proto-

col, the command code is input on DQ[3:0], and is output on DQ[3:0]. The operation is

terminated by driving S# HIGH at any time during data output.

The status register can be read continuously and at any time, including during a PRO-

GRAM, ERASE, or WRITE operation.

The flag status register can be read continuously and at any time, including during an

ERASE or WRITE operation.

If one of these operations is in progress, checking the write in progress bit or P/E con-

troller bit is recommended before executing the command.

Figure 10: READ REGISTER Command

High-Z

DQ1

7 8 910 11 12 13 14 15

MSB

DQ0

LSB

Command

3 4 5 6 7

MSB

DQ[1:0]

LSB

Command

MSB

DOUT DOUT DOUT DOUT DOUT

LSB

Extended

MSB

DOUT DOUT DOUT DOUT DOUT

LSB

DOUT DOUT DOUT DOUT

Dual

Quad 1 2 3

MSB

DQ[3:0]

LSB

Command

MSB

DOUT DOUT DOUT

LSB

Don’t Care

Notes: 1. Supports all READ REGISTER commands except READ LOCK REGISTER.

2. A READ NONVOLATILE CONFIGURATION REGISTER operation will output data starting

from the least significant byte.

READ NONVOLATILE CONFIGURATION REGISTER Command

To execute a READ NONVOLATILE CONFIGURATION REGISTER command, S# is driv-

en LOW. For extended SPI protocol, the command code is input on DQ0, and output on

DQ1. For dual SPI protocol, the command code is input on DQ[1:0], and output on

DQ[1:0]. For quad SPI protocol, the command code is input on DQ[3:0], and is output

1.8V, 256Mb: Multiple I/O Serial Flash Memory

READ REGISTER and WRITE REGISTER Operations

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on DQ[3:0]. The operation is terminated by driving S# HIGH at any time during data

output.

The nonvolatile configuration register can be read continuously. After all 16 bits of the

READ VOLATILE or ENHANCED VOLATILE CONFIGURATION REGISTER Command

To execute a READ VOLATILE CONFIGURATION REGISTER command or a READ EN-

HANCED VOLATILE CONFIGURATION REGISTER command, S# is driven LOW. For ex-

tended SPI protocol, the command code is input on DQ0, and output on DQ1. For dual

SPI protocol, the command code is input on DQ[1:0], and output on DQ[1:0]. For quad

SPI protocol, the command code is input on DQ[3:0], and is output on DQ[3:0]. The op-

eration is terminated by driving S# HIGH at any time during data output.

When the register is read continuously, the same byte is output repeatedly.

READ EXTENDED ADDRESS REGISTER Command

To initiate a READ EXTENDED ADDRESS REGISTER command, S# is driven LOW. For

extended SPI protocol, the command code is input on DQ0, and output on DQ1. For

dual SPI protocol, the command code is input on DQ[1:0], and output on DQ[1:0]. For

quad SPI protocol, the command code is input on DQ[3:0], and is output on DQ[3:0].

The operation is terminated by driving S# HIGH at any time during data output.

When the register is read continuously, the same byte is output repeatedly.

WRITE STATUS REGISTER Command

To issue a WRITE STATUS REGISTER command, the WRITE ENABLE command must be

executed to set the write enable latch bit to 1. S# is driven LOW and held LOW until the

eighth bit of the last data byte has been latched in, after which it must be driven HIGH.

For extended SPI protocol, the command code is input on DQ0, followed by the data

bytes. For dual SPI protocol, the command code is input on DQ[1:0], followed by the da-

ta bytes. For quad SPI protocol, the command code is input on DQ[3:0], followed by the

data bytes. When S# is driven HIGH, the operation, which is self-timed, is initiated; its

duration is tW.

This command is used to write new values to status register bits 7:2, enabling software

data protection. The status register can also be combined with the W#/VPP signal to

provide hardware data protection. The WRITE STATUS REGISTER command has no ef-

fect on status register bits 1:0.

When the operation is in progress, the write in progress bit is set to 1. The write enable

latch bit is cleared to 0, whether the operation is successful or not. The status register

and flag status register can be polled for the operation status. When the operation com-

pletes, the write in progress bit is cleared to 0, whether the operation is successful or

not. If S# is not driven HIGH, the command is not executed, flag status register error

bits are not set, and the write enable latch remains set to 1.

1.8V, 256Mb: Multiple I/O Serial Flash Memory

READ REGISTER and WRITE REGISTER Operations

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(pincron‘ Extended

Figure 11: WRITE REGISTER Command

7 8 9 10 11 12 13 14 15

MSB

DQ0

LSB

Command

3 4 5 6 7

MSB

DQ[1:0]

LSB

Command

MSB

DIN DIN DIN DIN DIN

LSB

Extended

MSB

LSB

DIN DIN DIN DIN DIN

DIN DIN DIN DIN

Dual

Quad 1 2 3

MSB

DQ[3:0]

LSB

Command

MSB

DIN DIN DIN

LSB

Notes: 1. Supports all WRITE REGISTER commands except WRITE LOCK REGISTER.

2. Waveform must be extended for each protocol, to 23 for extended, 11 for dual, and 5

for quad.

3. A WRITE NONVOLATILE CONFIGURATION REGISTER operation requires data being sent

starting from least significant byte.

WRITE NONVOLATILE CONFIGURATION REGISTER Command

To execute the WRITE NONVOLATILE CONFIGURATION REGISTER command, the

WRITE ENABLE command must be executed to set the write enable latch bit to 1. S# is

driven LOW and held LOW until the 16th bit of the last data byte has been latched in,

after which it must be driven HIGH. For extended SPI protocol, the command code is

input on DQ0, followed by two data bytes. For dual SPI protocol, the command code is

input on DQ[1:0], followed by the data bytes. For quad SPI protocol, the command code

is input on DQ[3:0], followed by the data bytes. When S# is driven HIGH, the operation,

which is self-timed, is initiated; its duration is tNVCR.

When the operation is in progress, the write in progress bit is set to 1. The write enable

latch bit is cleared to 0, whether the operation is successful or not. The status register

and flag status register can be polled for the operation status. When the operation com-

pletes, the write in progress bit is cleared to 0, whether the operation is successful or

not. If S# is not driven HIGH, the command is not executed, flag status register error

bits are not set, and the write enable latch remains set to 1.

WRITE VOLATILE or ENHANCED VOLATILE CONFIGURATION REGISTER Command

To execute a WRITE VOLATILE CONFIGURATION REGISTER command or a WRITE

ENHANCED VOLATILE CONFIGURATION REGISTER command, the WRITE ENABLE

command must be executed to set the write enable latch bit to 1. S# is driven LOW and

held LOW until the eighth bit of the last data byte has been latched in, after which it

must be driven HIGH. For extended SPI protocol, the command code is input on DQ0,

followed by the data bytes. For dual SPI protocol, the command code is input on

DQ[1:0], followed by the data bytes. For quad SPI protocol, the command code is input

on DQ[3:0], followed by the data bytes.

1.8V, 256Mb: Multiple I/O Serial Flash Memory

READ REGISTER and WRITE REGISTER Operations

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Because register bits are volatile, change to the bits is immediate. If S# is not driven

HIGH, the command is not executed, flag status register error bits are not set, and the

write enable latch remains set to 1. Reserved bits are not affected by this command.

WRITE EXTENDED ADDRESS REGISTER Command

To initiate a WRITE EXTENDED ADDRESS REGISTER command, the WRITE ENABLE

command must be executed to set the write enable latch bit to 1.

Note: The WRITE ENABLE command is not necessary on line items that enable the ad-

ditional RESET# pin.

S# is driven LOW and held LOW until the eighth bit of the last data byte has been latch-

ed in, after which it must be driven HIGH. The command code is input on DQ0, fol-

lowed by the data bytes. For dual SPI protocol, the command code is input on DQ[1:0],

followed by the data bytes. For quad SPI protocol, the command code is input on

DQ[3:0], followed by the data bytes.

Because register bits are volatile, change to the bits is immediate. If S# is not driven

HIGH, the command is not executed, the flag status register error bits are not set, and

the write enable latch remains set to 1. Reserved bits are not affected by this command.

READ LOCK REGISTER Command

To execute the READ LOCK REGISTER command, S# is driven LOW. For extended SPI

protocol, the command code is input on DQ0, followed by address bytes that point to a

location in the sector. For dual SPI protocol, the command code is input on DQ[1:0]. For

quad SPI protocol, the command code is input on DQ[3:0]. Each address bit is latched

in during the rising edge of the clock. For extended SPI protocol, data is shifted out on

DQ1 at a maximum frequency fC during the falling edge of the clock. For dual SPI proto-

col, data is shifted out on DQ[1:0], and for quad SPI protocol, data is shifted out on

DQ[3:0]. The operation is terminated by driving S# HIGH at any time during data out-

put.

When the register is read continuously, the same byte is output repeatedly. Any READ

LOCK REGISTER command that is executed while an ERASE, PROGRAM, or WRITE cy-

cle is in progress is rejected with no affect on the cycle in progress.

Table 19: Lock Register

Note 1 applies to entire table

Bit Name Settings Description

7:2 Reserved 0 Bit values are 0.

1 Sector lock down 0 = Cleared (Default)

1 = Set

Volatile bit: the device always powers-up with this bit cleared,

which means sector lock down and sector write lock bits can be

set.

When this bit set, neither of the lock register bits can be written

to until the next power cycle.

1.8V, 256Mb: Multiple I/O Serial Flash Memory

READ REGISTER and WRITE REGISTER Operations

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(pincron‘ Exxended (n

Table 19: Lock Register (Continued)

Note 1 applies to entire table

Bit Name Settings Description

0 Sector write lock 0 = Cleared (Default)

1 = Set

Volatile bit: the device always powers-up with this bit cleared,

which means that PROGRAM and ERASE operations in this sector

can be executed and sector content modified.

When this bit is set, PROGRAM and ERASE operations in this sec-

tor will not be executed.

Note: 1. Sector lock register bits 1:0 are written by the WRITE LOCK REGISTER command. The

command will not execute unless the sector lock down bit is cleared.

Figure 12: READ LOCK REGISTER Command

MSB

DQ[0]

LSB

Command

A[MAX]

A[MIN]

7 8 Cx

3 4 Cx

MSB

DQ[1:0]

LSB

Command

A[MAX]

A[MIN]

MSB

DOUT DOUT DOUT DOUT DOUT

LSB

1 2 Cx

MSB

DQ[3:0]

LSB

Command

A[MAX]

A[MIN]

MSB

DOUT DOUT DOUT

LSB

Extended

Dual

Quad

High-Z

DQ1

MSB

DOUT DOUT DOUT DOUT DOUT

LSB

DOUT DOUT DOUT DOUT

Don’t Care

Note: 1. For extended SPI protocol, Cx = 7 + (A[MAX] + 1).

For dual SPI protocol, Cx = 3 + ((A[MAX] + 1)/2).

For quad SPI protocol, Cx = 1 + ((A[MAX] + 1)/4).

WRITE LOCK REGISTER Command

To initiate the WRITE LOCK REGISTER command, the WRITE ENABLE command must

be executed to set the write enable latch bit to 1. S# is driven LOW and held LOW until

the eighth bit of the last data byte has been latched in, after which it must be driven

HIGH. The command code is input on DQn, followed by address bytes that point to a

location in the sector, and then one data byte that contains the desired settings for lock

When execution is complete, the write enable latch bit is cleared within tSHSL2 and no

error bits are set. Because lock register bits are volatile, change to the bits is immediate.

WRITE LOCK REGISTER can be executed when an ERASE SUSPEND operation is in ef-

1.8V, 256Mb: Multiple I/O Serial Flash Memory

READ REGISTER and WRITE REGISTER Operations

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fect. If S# is not driven HIGH, the command is not executed, flag status register error

bits are not set, and the write enable latch remains set to 1.

Figure 13: WRITE LOCK REGISTER Command

7 8 Cx

MSB

DQ0

LSB

Command

A[MAX]

A[MIN]

MSB

DIN DIN DIN DIN DIN

LSB

DIN DIN DIN DIN

3 4 Cx

MSB

DQ[1:0]

LSB

Command

A[MAX]

A[MIN]

MSB

DIN DIN DIN DIN DIN

LSB

1 2 Cx

MSB

DQ[3:0]

LSB

Command

A[MAX]

A[MIN]

MSB

DIN DIN DIN

LSB

Extended

Dual

Quad

Note: 1. For extended SPI protocol, Cx = 7 + (A[MAX] + 1).

For dual SPI protocol, Cx = 3 + ((A[MAX] + 1)/2).

For quad SPI protocol, Cx = 1 + ((A[MAX] + 1)/4).

CLEAR FLAG STATUS REGISTER Command

To execute the CLEAR FLAG STATUS REGISTER command and reset the error bits

(erase, program, and protection), S# is driven LOW. For extended SPI protocol, the com-

mand code is input on DQ0. For dual SPI protocol, the command code is input on

DQ[1:0]. For quad SPI protocol, the command code is input on DQ[3:0]. The operation

is terminated by driving S# HIGH at any time.

1.8V, 256Mb: Multiple I/O Serial Flash Memory

READ REGISTER and WRITE REGISTER Operations

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READ IDENTIFICATION Operations

READ ID and MULTIPLE I/O READ ID Commands

To execute the READ ID or MULTIPLE I/O READ ID commands, S# is driven LOW and

the command code is input on DQn. The device outputs the information shown in the

tables below. If an ERASE or PROGRAM cycle is in progress when the command is exe-

cuted, the command is not decoded and the command cycle in progress is not affected.

When S# is driven HIGH, the device goes to standby. The operation is terminated by

driving S# HIGH at any time during data output.

Table 20: Data/Address Lines for READ ID and MULTIPLE I/O READ ID Commands

Command Name Data In Data Out

Unique ID

is Output Extended Dual Quad

READ ID DQ0 DQ0 Yes Yes No No

MULTIPLE I/O READ ID DQ[3:0] DQ[1:0] No No Yes Yes

Note: 1. Yes in the protocol columns indicates that the command is supported and has the same

functionality and command sequence as other commands marked Yes.

Table 21: Read ID Data Out

Size

(Bytes) Name Content Value Assigned by

1Manufacturer ID 20h (selected by READ

MANUFACTURER ID)

JEDEC

2Device ID

Memory Type BBh Manufacturer

Memory Capacity 19h (256Mb)

17 Unique ID

1 Byte: Length of data to follow 10h Factory

2 Bytes: Extended device ID and device

configuration information

ID and information such as uniform

architecture, and HOLD

or RESET functionality

14 Bytes: Customized factory data Optional

Note: 1. The 17 bytes of information in the unique ID is read by the READ ID command, but can-

not be read by the MULTIPLE I/O READ ID command.

Table 22: Extended Device ID, First Byte

Bit 7 Bit 6 Bit 5 Bit 4 Bit 3 Bit 2 Bit 1 Bit 0

Reserved Reserved 1 = Alternate BP

scheme

0 = Standard BP

scheme

Volatile configuration

0 = Required

1 = Not required

HOLD#/RESET#:

0 = HOLD

1 = RESET

Addressing:

0 = by byte

Architecture:

00 = Uniform

1.8V, 256Mb: Multiple I/O Serial Flash Memory

READ IDENTIFICATION Operations

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21:27 11/ M m

Figure 14: READ ID and MULTIPLE I/O Read ID Commands

UID

Device

identification

Manufacturer

identification

High-Z

DQ1

MSB MSB

DOUT DOUT DOUT DOUT

LSB

7 8 15 16 32

MSB

DQ0

LSB

Command

MSB

DOUT DOUT

LSB

Extended (READ ID)

Dual (MULTIPLE I/O READ ID )

Quad (MULTIPLE I/O READ ID )

Don’t Care

3 4 7815

MSB

DQ[1:0]

LSB

Command

Device

identification

Manufacturer

identification

MSB MSB

DOUT DOUT DOUT DOUT

LSB

1 2 347

MSB

DQ[3:0]

LSB

Command

Device

identification

Manufacturer

identification

MSB MSB

DOUT DOUT DOUT DOUT

LSB

Note: 1. The READ ID command is represented by the extended SPI protocol timing shown first.

The MULTIPLE I/O READ ID command is represented by the dual and quad SPI protocols

are shown below extended SPI protocol.

READ SERIAL FLASH DISCOVERY PARAMETER Command

To execute READ SERIAL FLASH DISCOVERY PARAMETER command, S# is driven

LOW. The command code is input on DQ0, followed by three address bytes and eight

dummy clock cycles (address is always 3 bytes, even for 4-byte address mode). The de-

vice outputs the information starting from the specified address. When the 2048-byte

boundary is reached, the data output wraps to address 0 of the serial Flash discovery

parameter table. The operation is terminated by driving S# HIGH at any time during da-

ta output.

The operation always executes in continuous mode so the read burst wrap setting in the

volatile configuration register does not apply.

Note: Data to be stored in the serial Flash discovery parameter area is still in the defini-

tion phase.

1.8V, 256Mb: Multiple I/O Serial Flash Memory

READ IDENTIFICATION Operations

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Table 23: Serial Flash Discovery Parameter Data Structure

Compliant with JEDEC standard JC-42.4 1775.03

Description

Address

(Byte Mode) Address (Bit) Data

Serial Flash discoverable parameters signature 00h 7:00 53h

01h 15:8 46h

02h 23:16 44h

03h 31:24 50h

Serial Flash discoverable parameters Minor revision 04h 7:0 00h

Major revision 05h 15:8 01h

Number of parameter headers 06h 7:0 00h

Reserved 07h 15:8 FFh

Parameter ID (0) JEDEC-defined parameter table 08h 7:0 00h

Parameter Minor revision 09h 15:8 00h

Major revision 0Ah 23:16 01h

Parameter length (DW) 0Bh 31:24 09h

Parameter table pointer 0Ch 7:0 30h

0Dh 15:8 00h

0Eh 23:16 00h

Reserved 0Fh 31:24 FFh

Parameter ID (1) 10h 7:0 FFh

Parameter Minor revision 11h 15:8 FFh

Major revision 12h 23:16 FFh

Parameter length (DW) 13h 31:24 FFh

Parameter table pointer 14h 7:0 FFh

15h 15:8 FFh

16h 23:16 FFh

Reserved 17h 31:24 FFh

Parameter ID (2) 18h 7:0 FFh

Parameter Minor revision 19h 15:8 FFh

Major revision 1Ah 23:16 FFh

Parameter length (DW) 1Bh 31:24 FFh

Parameter table pointer 1Ch 7:0 FFh

1Dh 15:8 FFh

1Eh 23:16 FFh

Reserved 1Fh 31:24 FFh

1.8V, 256Mb: Multiple I/O Serial Flash Memory

READ IDENTIFICATION Operations

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Table 24: Parameter ID

Compliant with JEDEC standard JC-42.4 1775.03

Description

Address

(Byte Mode) Address (Bit) Data

Minimum block/sector erase sizes 30h 0 10

Write granularity 2 1

WRITE ENABLE command required for writing to volatile status reg-

isters

3 0

Reserved 5 1

6 1

7 1

4KB erase command code 31h 15:8 20h

Supports DUAL OUTPUT FAST READ operation (single input address,

dual output)

32h 16 1

Number of address bytes used (3-byte or 4-byte) for array READ,

WRITE, and ERASE commands

17 1

Supports double transfer rate clocking 19 1

Supports DUAL INPUT/OUTPUT FAST READ operation (dual input ad-

dress, dual output)

20 1

Supports QUAD INPUT/OUTPUT FAST READ operation (quad input

address, quad output)

21 1

Supports QUAD OUTPUT FAST READ operation (single input address,

quad output)

22 1

Reserved 23 1

Reserved 33h 31:24 FFh

Flash size (bits) 34h–37h 31:0 0FFFFFFFh

Number of dummy clock cycles required before valid output from

QUAD INPUT/OUTPUT FAST READ operation

38h 4:00 01001b

Number of XIP confirmation bits for QUAD INPUT/OUTPUT FAST

READ operation

7:5 001b

Command code for QUAD INPUT/OUTPUT FAST READ operation 39h 15:8 EBh

Number of dummy clock cycles required before valid output from

QUAD OUTPUT FAST READ operation

3Ah 20:16 00111b

Number of XIP confirmation bits for QUAD OUTPUT FAST READ op-

eration

23:21 001b

Command code for QUAD OUTPUT FAST READ operation 3Bh 31:24 6Bh

Number of dummy clock cycles required before valid output from

DUAL OUTPUT FAST READ operation

3Ch 4:0 01000b

Number of XIP confirmation bits for DUAL OUTPUT FAST READ oper-

ation

7:5 000b

Command code for DUAL OUTPUT FAST READ operation 3Dh 15:8 3Bh

1.8V, 256Mb: Multiple I/O Serial Flash Memory

READ IDENTIFICATION Operations

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Table 24: Parameter ID (Continued)

Compliant with JEDEC standard JC-42.4 1775.03

Description

Address

(Byte Mode) Address (Bit) Data

Number of dummy clock cycles required before valid output from

DUAL INPUT/OUTPUT FAST READ operation

3Eh 20:16 00111b

Number of XIP confirmation bits for DUAL INPUT/OUTPUT FAST

READ

23:21 001b

Command code for DUAL INPUT/OUTPUT FAST READ operation 3Fh 31:24 BBh

Supports FAST READ operation in dual SPI protocol 40h 0 1

Reserved 3:1 111b

Supports FAST READ operation in quad SPI protocol 4 1

Reserved 7:5 111b

Reserved 41h–43h – FFFFFFh

Reserved 44h–45h – FFFFh

Number of dummy clock cycles required before valid output from

FAST READ operation in dual SPI protocol

46h 4:0 00111b

Number of XIP confirmation bits for FAST READ operation in dual SPI

protocol

46h 7:5 001b

Command code for FAST READ operation in dual SPI protocol 47h 7:0 BBh

Reserved 48h–49h – FFFFh

Number of dummy clock cycles required before valid output from

FAST READ operation in quad SPI protocol

4Ah 4:0 01001b

Number of XIP confirmation bits for FAST READ operation in quad

SPI protocol

7:5 001b

Command code for FAST READ operation in quad SPI protocol 4Bh 7:0 EBh

Sector type 1 size (4k) 4Ch 7:0 0Ch

Sector type 1 command code (4k) 4Ch 7:0 0Ch

Sector type 2 size (64KB) 4Eh 7:0 10h

Sector type 2 command code 64KB) 4Fh 7:0 D8h

Sector type 3 size (not present) 50h 7:0 00h

Sector type 3 size (not present) 51h 7:0 00h

Sector type 4 size (not present) 52h 7:0 00h

Sector type 4 size (not present) 53h 7:0 00h

1.8V, 256Mb: Multiple I/O Serial Flash Memory

READ IDENTIFICATION Operations

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ﬂcron'

READ MEMORY Operations

The device supports default reading and writing to an A[MAX:MIN] of A[23:0] (3-byte

address).

Reading and writing to an A[MAX:MIN] of A[31:0] (4-byte address) is also supported. Se-

lection of the 3-byte or 4-byte address range can be enabled in two ways: setting the

nonvolatile configuration register or entering the ENABLE 4-BYTE ADDRESS MODE or

EXIT 4-BYTE ADDRESS MODE commands. Further details for these settings and com-

mands are in the respective register and command sections of the data sheet.

Note: When the device is set to the default address range of A[23:0], another method for

enabling 4-byte addressing is through the extended address register. Details can be

found in Nonvolatile and Volatile Registers.

3-Byte Address

To execute READ MEMORY commands, S# is driven LOW. The command code is input

on DQn, followed by input on DQn of three address bytes. Each address bit is latched in

during the rising edge of the clock. The addressed byte can be at any location, and the

address automatically increments to the next address after each byte of data is shifted

out; therefore, the entire memory can be read with a single command. The operation is

terminated by driving S# HIGH at any time during data output.

Table 25: Command/Address/Data Lines for READ MEMORY Commands

Note 1 applies to entire table

Command Name

READ

FAST

READ

DUAL OUTPUT

FAST READ

DUAL

INPUT/OUTPUT

FAST READ

QUAD OUTPUT

FAST READ

QUAD

INPUT/OUTPUT

FAST READ

STR Mode 03h 0Bh 3Bh BBh 6Bh EBh

DTR Mode – 0Dh 3Dh BDh 6Dh EDh

Extended SPI Protocol

Supported Yes Yes Yes Yes Yes Yes

Command Input DQ0 DQ0 DQ0 DQ0 DQ0 DQ0

Address Input DQ0 DQ0 DQ0 DQ[1:0] DQ0 DQ[3:0]

Data Output DQ1 DQ1 DQ[1:0] DQ[1:0] DQ[3:0] DQ[3:0]

Dual SPI Protocol

Supported No Yes Yes Yes No No

Command Input – DQ[1:0] DQ[1:0] DQ[1:0] – –

Address Input – DQ[1:0] DQ[1:0] DQ[1:0] – –

Data Output – DQ[1:0] DQ[1:0] DQ[1:0] – –

Quad SPI Protocol

Supported No Yes No No Yes Yes

Command Input – DQ[3:0] – – DQ[3:0] DQ[3:0]

Address Input – DQ[3:0] – – DQ[3:0] DQ[3:0]

1.8V, 256Mb: Multiple I/O Serial Flash Memory

READ MEMORY Operations

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Table 25: Command/Address/Data Lines for READ MEMORY Commands (Continued)

Note 1 applies to entire table

Command Name

READ

FAST

READ

DUAL OUTPUT

FAST READ

DUAL

INPUT/OUTPUT

FAST READ

QUAD OUTPUT

FAST READ

QUAD

INPUT/OUTPUT

FAST READ

STR Mode 03h 0Bh 3Bh BBh 6Bh EBh

DTR Mode – 0Dh 3Dh BDh 6Dh EDh

Data Output – DQ[3:0] – – DQ[3:0] DQ[3:0]

Notes: 1. Yes in the "Supported" row for each protocol indicates that the command in that col-

umn is supported; when supported, a command's functionality is identical for the entire

column regardless of the protocol. For example, a FAST READ functions the same for all

three protocols even though its data is input/output differently depending on the pro-

tocol.

2. FAST READ is similar to READ, but requires dummy clock cycles following the address

bytes and can operate at a higher frequency (fC).

1.8V, 256Mb: Multiple I/O Serial Flash Memory

READ MEMORY Operations

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ﬂcron'

4-Byte Address

To execute 4-byte READ MEMORY commands, S# is driven LOW. The command code is

input on DQn, followed by input on DQn of four address bytes. Each address bit is

latched in during the rising edge of the clock. The addressed byte can be at any location,

and the address automatically increments to the next address after each byte of data is

shifted out; therefore, the entire memory can be read with a single command. The oper-

ation is terminated by driving S# HIGH at any time during data output.

Table 26: Command/Address/Data Lines for READ MEMORY Commands – 4-Byte Address

Notes 1 and 2 apply to entire table

Command Name (4-Byte Address)

READ

FAST

READ

DUAL OUTPUT

FAST READ

DUAL

INPUT/OUTPUT

FAST READ

QUAD OUTPUT

FAST READ

QUAD

INPUT/OUTPUT

FAST READ

STR Mode 03h/13h 0Bh/0Ch 3Bh/3Ch BBh/BCh 6Bh/6Ch EBh/ECh

DTR Mode – 0Dh 3Dh BDh 6Dh EDh

Extended SPI Protocol

Supported Yes Yes Yes Yes Yes Yes

Command Input DQ0 DQ0 DQ0 DQ0 DQ0 DQ0

Address Input DQ0 DQ0 DQ0 DQ[1:0] DQ0 DQ[3:0]

Data Output DQ1 DQ1 DQ[1:0] DQ[1:0] DQ[3:0] DQ[3:0]

Dual SPI Protocol

Supported No Yes Yes Yes No No

Command Input – DQ[1:0] DQ[1:0] DQ[1:0] – –

Address Input – DQ[1:0] DQ[1:0] DQ[1:0] – –

Data Output – DQ[1:0] DQ[1:0] DQ[1:0] – –

Quad SPI Protocol

Supported No Yes No No Yes Yes

Command Input – DQ[3:0] – – DQ[3:0] DQ[3:0]

Address Input – DQ[3:0] – – DQ[3:0] DQ[3:0]

Data Output – DQ[3:0] – – DQ[3:0] DQ[3:0]

Notes: 1. Yes in the "Supported" row for each protocol indicates that the command in that col-

umn is supported; when supported, a command's functionality is identical for the entire

column regardless of the protocol. For example, a FAST READ functions the same for all

three protocols even though its data is input/output differently depending on the pro-

tocol.

2. Command codes 13h, 0Ch, 3Ch, BCh, 6Ch, and ECh do not need to be set up in the ad-

dressing mode; they will work directly in 4-byte addressing mode.

3. A 4-BYTE FAST READ command is similar to 4-BYTE READ operation, but requires dum-

my clock cycles following the address bytes and can operate at a higher frequency (fC).

1.8V, 256Mb: Multiple I/O Serial Flash Memory

READ MEMORY Operations

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(pincron‘ Ex‘ended 1 ~11 ‘ [Ex i/ 1 us: 7 AER—E} ‘ no“, on“. x am. ”am x “mu Dom Dam Dam W W (n

Figure 15: READ Command

Don’t Care

MSB

DQ[0]

LSB

Command

A[MAX]

A[MIN]

7 8 Cx

Extended

High-Z

DQ1

MSB

DOUT DOUT DOUT DOUT DOUT

LSB

DOUT DOUT DOUT DOUT

Note: 1. Cx = 7 + (A[MAX] + 1).

READ MEMORY Operations Timing – Single Transfer Rate

Figure 16: FAST READ Command

7 8 Cx

MSB

DQ0

LSB

Command

A[MAX]

A[MIN]

3 4 Cx

MSB

DQ[1:0]

LSB

Command

A[MAX]

A[MIN]

MSB

DOUT DOUT DOUT DOUT DOUT

LSB

Dummy cycles

1 2 Cx

MSB

DQ[3:0]

LSB

Command

A[MAX]

A[MIN]

MSB

DOUT DOUT DOUT

LSB

Dummy cycles

Extended

MSB

DOUT DOUT DOUT DOUT DOUT

LSB

DOUT DOUT DOUT DOUT

Dummy cycles

Dual

Quad

DQ1 High-Z

Don’t Care

Note: 1. For extended protocol, Cx = 7 + (A[MAX] + 1).

For dual protocol, Cx = 3 + (A[MAX] + 1)/2.

For quad protocol, Cx = 1 + (A[MAX] + 1)/4.

1.8V, 256Mb: Multiple I/O Serial Flash Memory

READ MEMORY Operations

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Figure 17: DUAL OUTPUT FAST READ Command – STR

7 8 Cx

MSB

DQ0

LSB

Command DOUT

LSB

DQ1 DOUT

A[MAX]

High-Z

A[MIN]

DOUT

MSB

DOUT

Dummy cycles

DQ[1:0]

Dual

Extended

3 4 Cx

MSB

LSB

Command

A[MAX]

A[MIN]

MSB

DOUT DOUT DOUT DOUT DOUT

LSB

Dummy cycles

Notes: 1. Cx = 7 + (A[MAX] + 1).

2. Shown here is the DUAL OUTPUT FAST READ timing for the extended SPI protocol. The

dual timing shown for the FAST READ command is the equivalent of the DUAL OUTPUT

FAST READ timing for the dual SPI protocol.

Figure 18: DUAL INPUT/OUTPUT FAST READ Command – STR

7 8 Cx

MSB

DQ0

LSB

Command DOUT

LSB

DQ1 DOUT

High-Z

A[MIN]

DOUT

MSB

DOUT

A[MAX]

Dummy cycles

3 4 Cx

MSB

DQ[1:0]

LSB

Command

A[MAX]

A[MIN]

MSB

DOUT DOUT DOUT DOUT DOUT

LSB

Dummy cycles

Dual

Extended

Notes: 1. Cx = 7 + (A[MAX] + 1)/2.

2. Shown here is the DUAL INPUT/OUTPUT FAST READ timing for the extended SPI proto-

col. The dual timing shown for the FAST READ command is the equivalent of the DUAL

INPUT/OUTPUT FAST READ timing for the dual SPI protocol.

1.8V, 256Mb: Multiple I/O Serial Flash Memory

READ MEMORY Operations

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Figure 19: QUAD OUTPUT FAST READ Command – STR

Dummy cycles

7 8 Cx

MSB

DQ0

LSB

Command DOUT

LSB

DQ[2:1] DOUT

A[MAX]

High-Z

A[MIN]

DOUT

DQ3 DOUT

‘1’

MSB

DOUT DOUT

1 2 Cx

MSB

DQ[3:0]

LSB

Command

A[MAX]

A[MIN]

MSB

DOUT DOUT DOUT

LSB

Dummy cycles

Quad

Extended

Notes: 1. Cx = 7 + (A[MAX] + 1).

2. Shown here is the QUAD OUTPUT FAST READ timing for the extended SPI protocol. The

quad timing shown for the FAST READ command is the equivalent of the QUAD OUT-

PUT FAST READ timing for the quad SPI protocol.

Figure 20: QUAD INPUT/OUTPUT FAST READ Command – STR

Dummy cycles

7 8 Cx

MSB

DQ0

LSB

Command DOUT

LSB

DQ[2:1] DOUT

High-Z

A[MIN]

DOUT

DQ3 DOUT

‘1’

MSB

DOUT DOUT

A[MAX]

1 2 Cx

MSB

DQ[3:0]

LSB

Command

A[MAX]

A[MIN]

MSB

DOUT DOUT DOUT

LSB

Dummy cycles

Quad

Extended

Notes: 1. Cx = 7 + (A[MAX] + 1)/4.

1.8V, 256Mb: Multiple I/O Serial Flash Memory

READ MEMORY Operations

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2. Shown here is the QUAD INPUT/OUTPUT FAST READ timing for the extended SPI proto-

col. The quad timing shown for the FAST READ command is the equivalent of the QUAD

INPUT/OUTPUT FAST READ timing for the quad SPI protocol.

1.8V, 256Mb: Multiple I/O Serial Flash Memory

READ MEMORY Operations

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(pincron‘ Extended 3<:21:jx:x:>qD<—_j>—en 1M ‘ ‘w HP—W W? I ;v# n

READ MEMORY Operations Timing – Double Transfer Rate

Figure 21: FAST READ Command – DTR

7 8 Cx

MSB

DQ0

LSB

Command

A[MAX]

A[MIN]

3 4 Cx

MSB

DQ[1:0]

LSB

Command

A[MAX]

A[MIN]

MSB

LSB

Dummy cycles

1 2 Cx

MSB

DQ[3:0]

LSB

Command

A[MAX]

A[MIN]

MSB

LSB

Dummy cycles

Extended

MSB

LSB

Dummy cycles

Dual

Quad

DQ1 High-Z

Don’t Care

DOUT

DOUT DOUT DOUT DOUT DOUT DOUT DOUT DOUT

DOUT

DOUT DOUT DOUT DOUT DOUT DOUT DOUT

DOUT

DOUT DOUT DOUT

DOUT DOUT DOUT DOUT DOUT DOUT DOUT

Note: 1. For extended protocol, Cx = 7 + (A[MAX] + 1)/2.

For dual protocol, Cx = 3 + (A[MAX] + 1)/4.

For quad protocol, Cx = 1 + (A[MAX] + 1)/8.

1.8V, 256Mb: Multiple I/O Serial Flash Memory

READ MEMORY Operations

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Figure 22: DUAL OUTPUT FAST READ Command – DTR

7 8 Cx

DQ0

LSB

DQ1

Extended

A[MAX]

High-Z

A[MIN]

MSB

Dummy cycles

DOUT

DOUT DOUT DOUT DOUT DOUT DOUT DOUT

DOUT

DOUT DOUT DOUT DOUT DOUT DOUT DOUT

MSB

LSB

DOUT

DOUT DOUT DOUT DOUT DOUT DOUT DOUT

3 4 Cx

MSB

DQ[1:0]

LSB

Command

MSB

LSB

Command

A[MAX]

A[MIN]

Dummy cycles

Dual

Notes: 1. Cx = 7 + (A[MAX] + 1)/2.

2. Shown here is the DUAL OUTPUT FAST READ timing for the extended SPI protocol. The

dual timing shown for the FAST READ command is the equivalent of the DUAL OUTPUT

FAST READ timing for the dual SPI protocol.

Figure 23: DUAL INPUT/OUTPUT FAST READ Command – DTR

DQ0

DQ1

7 8 Cx

MSB

LSB

Command DOUT

LSB

DOUT

High-Z

A[MIN]

DOUT

MSB

DOUT

A[MAX]

Dummy cycles

Dual

DQ[1:0]

3 4 Cx

MSB

LSB

Command

A[MAX]

A[MIN]

MSB

LSB

Dummy cycles

DOUT

DOUT DOUT DOUT DOUT DOUT DOUT DOUT

Extended

Notes: 1. Cx = 7 + (A[MAX] + 1)/4.

2. Shown here is the DUAL INPUT/OUTPUT FAST READ timing for the extended SPI proto-

col. The dual timing shown for the FAST READ command is the equivalent of the DUAL

INPUT/OUTPUT FAST READ timing for the dual SPI protocol.

1.8V, 256Mb: Multiple I/O Serial Flash Memory

READ MEMORY Operations

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Ex‘ended

Figure 24: QUAD OUTPUT FAST READ Command – DTR

DQ0

DQ[2:1]

DQ3

Dummy cycles

7 8 Cx

MSB

LSB

Command

LSB

A[MAX]

High-Z

A[MIN]

‘1’

MSB

DOUT

DOUT DOUT DOUT

DOUT

DOUT DOUT DOUT

DOUT

DOUT DOUT DOUT

DQ[3:0]

Quad

Extended

1 2 Cx

MSB

LSB

Command

A[MAX]

A[MIN]

MSB

LSB

Dummy cycles

DOUT

DOUT DOUT DOUT

Notes: 1. Cx = 7 + (A[MAX] + 1)/2.

2. Shown here is the QUAD OUTPUT FAST READ timing for the extended SPI protocol. The

quad timing shown for the FAST READ command is the equivalent of the QUAD OUT-

PUT FAST READ timing for the quad SPI protocol.

Figure 25: QUAD INPUT/OUTPUT FAST READ Command – DTR

DQ0

DQ[2:1]

Extended

DQ3

Dummy cycles

7 8 Cx

MSB

LSB

Command

LSB

High-Z

A[MIN]

‘1’

MSB

A[MAX]

DOUT

DOUT DOUT DOUT

DOUT

DOUT DOUT DOUT

DOUT

DOUT DOUT DOUT

DQ[3:0]

Quad 1 2 Cx

MSB

LSB

Command

A[MAX]

A[MIN]

MSB

LSB

Dummy cycles

DOUT

DOUT DOUT DOUT

Notes: 1. Cx = 7 + (A[MAX] + 1)/8.

2. Shown here is the QUAD INPUT/OUTPUT FAST READ timing for the extended SPI proto-

col. The quad timing shown for the FAST READ command is the equivalent of the QUAD

INPUT/OUTPUT FAST READ timing for the quad SPI protocol.

1.8V, 256Mb: Multiple I/O Serial Flash Memory

READ MEMORY Operations

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PROGRAM Operations

PROGRAM commands are initiated by first executing the WRITE ENABLE command to

set the write enable latch bit to 1. S# is then driven LOW and held LOW until the eighth

bit of the last data byte has been latched in, after which it must be driven HIGH. The

command code is input on DQ0, followed by input on DQ[n] of address bytes and at

least one data byte. Each address bit is latched in during the rising edge of the clock.

When S# is driven HIGH, the operation, which is self-timed, is initiated; its duration is

tPP.

If the bits of the least significant address, which is the starting address, are not all zero,

all data transmitted beyond the end of the current page is programmed from the start-

ing address of the same page. If the number of bytes sent to the device exceed the maxi-

mum page size, previously latched data is discarded and only the last maximum page-

size number of data bytes are guaranteed to be programmed correctly within the same

page. If the number of bytes sent to the device is less than the maximum page size, they

are correctly programmed at the specified addresses without any effect on the other

bytes of the same page.

When the operation is in progress, the write in progress bit is set to 1. The write enable

latch bit is cleared to 0, whether the operation is successful or not. The status register

and flag status register can be polled for the operation status. An operation can be

paused or resumed by the PROGRAM/ERASE SUSPEND or PROGRAM/ERASE RESUME

command, respectively. When the operation completes, the write in progress bit is

cleared to 0.

If the operation times out, the write enable latch bit is reset and the program fail bit is

set to 1. If S# is not driven HIGH, the command is not executed, flag status register error

bits are not set, and the write enable latch remains set to 1. When a command is applied

to a protected sector, the command is not executed, the write enable latch bit remains

set to 1, and flag status register bits 1 and 4 are set.

Table 27: Data/Address Lines for PROGRAM Commands

Note 1 applies to entire table

Command Name Data In Address In Extended Dual Quad

PAGE PROGRAM DQ0 DQ0 Yes Yes Yes

DUAL INPUT FAST PROGRAM DQ[1:0] DQ0 Yes Yes No

EXTENDED DUAL INPUT

FAST PROGRAM

DQ[1:0] DQ[1:0] Yes Yes No

QUAD INPUT FAST PROGRAM DQ[3:0] DQ0 Yes No Yes

EXTENDED QUAD INPUT

FAST PROGRAM

DQ[3:0] DQ[3:0] Yes No Yes

Note: 1. Yes in the protocol columns indicates that the command is supported and has the same

functionality and command sequence as other commands marked Yes.

1.8V, 256Mb: Multiple I/O Serial Flash Memory

PROGRAM Operations

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Figure 26: PAGE PROGRAM Command

7 8 Cx

MSB

DQ0

LSB

Command

A[MAX]

A[MIN]

MSB

DIN DIN DIN DIN DIN

LSB

DIN DIN DIN DIN

3 4 Cx

MSB

DQ[1:0]

LSB

Command

A[MAX]

A[MIN]

MSB

DIN DIN DIN DIN DIN

LSB

1 2 Cx

MSB

DQ[3:0]

LSB

Command

A[MAX]

A[MIN]

MSB

DIN DIN DIN

LSB

Extended

Dual

Quad

Note: 1. For extended SPI protocol, Cx = 7 + (A[MAX] + 1).

For dual SPI protocol, Cx = 3 + (A[MAX] + 1)/2.

For quad SPI protocol, Cx = 1 + (A[MAX] + 1)/4.

Figure 27: DUAL INPUT FAST PROGRAM Command

Extended

Dual 3 4 Cx

MSB

DQ[1:0]

LSB

Command DIN

LSB

A[MAX]

A[MIN]

MSB

DIN DIN DIN DIN

7 8 Cx

MSB

DQ0

LSB

Command DIN

LSB

DQ1 DIN

A[MAX]

High-Z

A[MIN]

DIN

MSB

DIN

Note: 1. For extended SPI protocol, Cx = 7 + (A[MAX] + 1).

For dual SPI protocol, Cx = 3 + (A[MAX] + 1)/2.

1.8V, 256Mb: Multiple I/O Serial Flash Memory

PROGRAM Operations

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I! x 2/ x X X:

Figure 28: EXTENDED DUAL INPUT FAST PROGRAM Command

Extended

Dual 3 4 Cx

MSB

DQ[1:0]

LSB

Command DIN

LSB

A[MAX]

A[MIN]

MSB

DIN DIN DIN DIN

7 8 Cx

MSB

DQ0

LSB

Command DIN

LSB

DQ1 DIN

High-Z

A[MIN]

A[MAX]

DIN

MSB

DIN

Note: 1. For extended SPI protocol, Cx = 7 + (A[MAX] + 1)/2.

For dual SPI protocol, Cx = 3 + (A[MAX] + 1)/2.

Figure 29: QUAD INPUT FAST PROGRAM Command

7 8 Cx

MSB

DQ0

LSB

Command DIN

LSB

DQ[3:1] DIN

A[MAX]

High-Z

A[MIN]

DIN

MSB

DIN

Extended

Quad 1 2 Cx

MSB

DQ[3:0]

LSB

Command DIN

LSB

A[MAX]

A[MIN]

MSB

DIN DIN

Note: 1. For extended SPI protocol, Cx = 7 + (A[MAX] + 1)/4.

For quad SPI protocol, Cx = 1 + (A[MAX] + 1)/4.

1.8V, 256Mb: Multiple I/O Serial Flash Memory

PROGRAM Operations

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Figure 30: EXTENDED QUAD INPUT FAST PROGRAM Command

7 8 Cx

MSB

DQ0

LSB

Command DIN

LSB

DQ[2:1] DIN

High-Z

A[MIN]

A[MAX]

DIN

DQ3 DIN

‘1’

MSB

DIN DIN

Extended

Quad 1 2 Cx

MSB

DQ[3:0]

LSB

Command DIN

LSB

A[MAX]

A[MIN]

MSB

DIN DIN

Note: 1. For extended SPI protocol, Cx = 7 + (A[MAX] + 1)/4.

For quad SPI protocol, Cx = 1 + (A[MAX] + 1)/4.

1.8V, 256Mb: Multiple I/O Serial Flash Memory

PROGRAM Operations

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WRITE Operations

WRITE ENABLE Command

The WRITE ENABLE operation sets the write enable latch bit. To execute a WRITE ENA-

BLE command, S# is driven LOW and held LOW until the eighth bit of the command

code has been latched in, after which it must be driven HIGH. The command code is

input on DQ0 for extended SPI protocol, on DQ[1:0] for dual SPI protocol, and on

DQ[3:0] for quad SPI protocol.

The write enable latch bit must be set before every PROGRAM, ERASE, WRITE, ENTER

4-BYTE ADDRESS MODE, and EXIT 4-BYTE ADDRESS MODE command. If S# is not

driven HIGH after the command code has been latched in, the command is not execu-

ted, flag status register error bits are not set, and the write enable latch remains cleared

to its default setting of 0.

WRITE DISABLE Command

The WRITE DISABLE operation clears the write enable latch bit. To execute a WRITE

DISABLE command, S# is driven LOW and held LOW until the eighth bit of the com-

mand code has been latched in, after which it must be driven HIGH. The command

code is input on DQ0 for extended SPI protocol, on DQ[1:0] for dual SPI protocol, and

on DQ[3:0] for quad SPI protocol.

If S# is not driven HIGH after the command code has been latched in, the command is

not executed, flag status register error bits are not set, and the write enable latch re-

mains set to 1.

1.8V, 256Mb: Multiple I/O Serial Flash Memory

WRITE Operations

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Emended (D man

Figure 31: WRITE ENABLE and WRITE DISABLE Command Sequence

DQ0

MSB

LSB

Dual

Don’t Care

Command Bits

DQ0

01 2 4 53 76

Extended

High-Z

DQ1

MSB

LSB

0 0 0 0 0 011

Command Bits

0 0 1 0

MSB

LSB

DQ1

DQ2

Quad

Command Bits

DQ3 0 0

DQ0 0 0

DQ1 0 0 0 1

1 2

Note: 1. Shown here is the WRITE ENABLE command code, which is 06h or 0000 0110 binary. The

WRITE DISABLE command sequence is identical, except the WRITE DISABLE command

code is 04h or 0000 0100 binary.

1.8V, 256Mb: Multiple I/O Serial Flash Memory

WRITE Operations

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ERASE Operations

SUBSECTOR ERASE Command

To execute the SUBSECTOR ERASE command and set the selected subsector bits set to

FFh, the WRITE ENABLE command must be issued to set the write enable latch bit to 1.

S# is driven LOW and held LOW until the eighth bit of the last data byte has been latch-

ed in, after which it must be driven HIGH. The command code is input on DQ0, fol-

lowed by address bytes; any address within the subsector is valid. Each address bit is

latched in during the rising edge of the clock. When S# is driven HIGH, the operation,

which is self-timed, is initiated; its duration is tSSE. The operation can be suspended

and resumed by the PROGRAM/ERASE SUSPEND and PROGRAM/ERASE RESUME

commands, respectively.

If the write enable latch bit is not set, the device ignores the SUBSECTOR ERASE com-

mand and no error bits are set to indicate operation failure.

When the operation is in progress, the write in progress bit is set to 1. The write enable

latch bit is cleared to 0, whether the operation is successful or not. The status register

and flag status register can be polled for the operation status. When the operation com-

pletes, the write in progress bit is cleared to 0.

If the operation times out, the write enable latch bit is reset and the erase error bit is set

to 1. If S# is not driven HIGH, the command is not executed, flag status register error

bits are not set, and the write enable latch remains set to 1. When a command is applied

to a protected subsector, the command is not executed. Instead, the write enable latch

bit remains set to 1, and flag status register bits 1 and 5 are set.

SECTOR ERASE Command

To execute the SECTOR ERASE command (and set selected sector bits to FFh), the

WRITE ENABLE command must be issued to set the write enable latch bit to 1. S# is

driven LOW and held LOW until the eighth bit of the last data byte has been latched in,

after which it must be driven HIGH. The command code is input on DQ0, followed by

address bytes; any address within the sector is valid. Each address bit is latched in dur-

ing the rising edge of the clock. When S# is driven HIGH, the operation, which is self-

timed, is initiated; its duration is tSE. The operation can be suspended and resumed by

the PROGRAM/ERASE SUSPEND and PROGRAM/ERASE RESUME commands, respec-

tively.

If the write enable latch bit is not set, the device ignores the SECTOR ERASE command

and no error bits are set to indicate operation failure.

When the operation is in progress, the write in progress bit is set to 1 and the write ena-

ble latch bit is cleared to 0, whether the operation is successful or not. The status regis-

ter and flag status register can be polled for the operation status. When the operation

completes, the write in progress bit is cleared to 0.

If the operation times out, the write enable latch bit is reset and erase error bit is set to

1. If S# is not driven HIGH, the command is not executed, flag status register error bits

are not set, and the write enable latch remains set to 1. When a command is applied to a

protected sector, the command is not executed. Instead, the write enable latch bit re-

mains set to 1, and flag status register bits 1 and 5 are set.

1.8V, 256Mb: Multiple I/O Serial Flash Memory

ERASE Operations

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Figure 32: SUBSECTOR and SECTOR ERASE Command

7 8 Cx

MSB

DQ0

LSB

Command

A[MAX]

A[MIN]

3 4 Cx

MSB

DQ0[1:0]

LSB

Command

A[MAX]

A[MIN]

1 2 Cx

MSB

DQ0[3:0]

LSB

Command

A[MAX]

A[MIN]

Extended

Dual

Quad

Note: 1. For extended SPI protocol, Cx = 7 + (A[MAX] + 1).

For dual SPI protocol, Cx = 3 + (A[MAX] + 1)/2.

For quad SPI protocol, Cx = 1 + (A[MAX] + 1)/4.

BULK ERASE Command

To initiate the BULK ERASE command, the WRITE ENABLE command must be issued

to set the write enable latch bit to 1. S# is driven LOW and held LOW until the eighth bit

of the last data byte has been latched in, after which it must be driven HIGH. The com-

mand code is input on DQ0. When S# is driven HIGH, the operation, which is self-

timed, is initiated; its duration is tBE.

If the write enable latch bit is not set, the device ignores the SECTOR ERASE command

and no error bits are set to indicate operation failure.

When the operation is in progress, the write in progress bit is set to 1 and the write ena-

ble latch bit is cleared to 0, whether the operation is successful or not. The status regis-

ter and flag status register can be polled for the operation status. When the operation

completes, the write in progress bit is cleared to 0.

If the operation times out, the write enable latch bit is reset and erase error bit is set to

1. If S# is not driven HIGH, the command is not executed, the flag status register error

bits are not set, and the write enable latch remains set to 1.

The command is not executed if any sector is locked. Instead, the write enable latch bit

remains set to 1, and flag status register bits 1 and 5 are set.

1.8V, 256Mb: Multiple I/O Serial Flash Memory

ERASE Operations

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Extended

Figure 33: BULK ERASE Command

MSB

DQ0

LSB

Command

MSB

DQ[1:0]

LSB

Command

MSB

DQ[3:0]

LSB

Command

Extended

Dual

Quad

PROGRAM/ERASE SUSPEND Command

To initiate the PROGRAM/ERASE SUSPEND command, S# is driven LOW. The com-

mand code is input on DQ0. The operation is terminated by the PROGRAM/ERASE RE-

SUME command.

PROGRAM/ERASE SUSPEND command enables the memory controller to interrupt

and suspend an array PROGRAM or ERASE operation within the program/erase latency.

If a SUSPEND command is issued during a PROGRAM operation, then the flag status

also set to 1, showing the device to be in a suspended state, waiting for any operation

(see the Operations Allowed/Disallowed During Device States table).

If a SUSPEND command is issued during an ERASE operation, then the flag status regis-

ter bit 6 is set to 1. After erase/program latency time, the flag status register bit 7 is also

set to 1, showing that device to be in a suspended state, waiting for any operation (see

the Operations Allowed/Disallowed During Device States table).

If the time remaining to complete the operation is less than the suspend latency, the de-

vice completes the operation and clears the flag status register bits 2 or 6, as applicable.

Because the suspend state is volatile, if there is a power cycle, the suspend state infor-

mation is lost and the flag status register powers up as 80h.

During an ERASE SUSPEND operation, a PROGRAM or READ operation is possible in

any sector except the one in a suspended state. Reading from a sector that is in a sus-

pended state will output indeterminate data. The device ignores a PROGRAM com-

mand to a sector that is in an ERASE SUSPEND state; it also sets to 1 the flag status reg-

ister bit 4: program failure/protection error, and leaves the write enable latch bit un-

changed. The WRITE LOCK REGISTER, WRITE VOLATILE CONFIGURATION REGIS-

TER, and WRITE ENHANCED VOLATILE CONFIGURATION REGISTER commands are

1.8V, 256Mb: Multiple I/O Serial Flash Memory

ERASE Operations

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allowed during an ERASE SUSPEND state. When the ERASE operation resumes, it does

not check the new lock status of the WRITE LOCK REGISTER command.

During a PROGRAM SUSPEND operation, a READ operation is possible in any page ex-

cept the one in a suspended state. Reading from a page that is in a suspended state will

output indeterminate data. The commands allowed during a program suspend state in-

clude the WRITE VOLATILE CONFIGURATION REGISTER command and the WRITE

ENHANCED VOLATILE CONFIGURATION REGISTER command.

It is possible to nest a PROGRAM/ERASE SUSPEND operation inside a PROGRAM/

ERASE SUSPEND operation just once. Issue an ERASE command and suspend it. Then

issue a PROGRAM command and suspend it also. With the two operations suspended,

the next PROGRAM/ERASE RESUME command resumes the latter operation, and a sec-

ond PROGRAM/ERASE RESUME command resumes the former (or first) operation.

Table 28: Suspend Parameters

Parameter Condition Typ Max Units Notes

Erase to suspend Sector erase or erase resume to erase suspend 700 – µs 1

Program to suspend Program resume to program suspend 5 – µs 1

Subsector erase to sus-

pend

Subsector erase or subsector erase resume to erase sus-

pend

50 – µs 1

Suspend latency Program 7 – µs 2

Suspend latency Subsector erase 15 – µs 2

Suspend latency Erase 15 – µs 3

Notes: 1. Timing is not internally controlled.

2. Any READ command accepted.

3. Any command except the following are accepted: SECTOR, SUBSECTOR, or BULK ERASE;

WRITE STATUS REGISTER; WRITE NONVOLATILE CONFIGURATION REGISTER; and PRO-

GRAM OTP.

1.8V, 256Mb: Multiple I/O Serial Flash Memory

ERASE Operations

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Table 29: Operations Allowed/Disallowed During Device States

Note 1 applies to entire table

Operation

Standby

State

Program or

Erase State

Subsector Erase Suspend or

Program Suspend State

Erase Suspend

State Notes

READ Yes No Yes Yes 2

PROGRAM Yes No No Yes/No 3

ERASE Yes No No No 4

WRITE Yes No No No 5

WRITE Yes No Yes Yes 6

READ Yes Yes Yes Yes 7

SUSPEND No Yes No No 8

Notes: 1. The device can be in only one state at a time. Depending on the state of the device,

some operations are allowed (Yes) and others are not (No). For example, when the de-

vice is in the standby state, all operations except SUSPEND are allowed in any sector. For

all device states except the erase suspend state, if an operation is allowed or disallowed

in one sector, it is allowed or disallowed in all other sectors. In the erase suspend state, a

PROGRAM operation is allowed in any sector except the one in which an ERASE opera-

tion has been suspended.

2. All READ operations except READ STATUS REGISTER and READ FLAG REGISTER. When is-

sued to a sector or subsector that is simultaneously in an erase suspend state, the READ

operation is accepted, but the data output is not guaranteed until the erase has comple-

ted.

3. All PROGRAM operations except PROGRAM OTP. In the erase suspend state, a PROGRAM

operation is allowed in any sector (Yes) except the sector (No) in which an ERASE opera-

tion has been suspended.

4. Applies to the SECTOR ERASE or SUBSECTOR ERASE operation.

5. Applies to the following operations: WRITE STATUS REGISTER, WRITE NONVOLATILE

CONFIGURATION REGISTER, PROGRAM OTP, and BULK ERASE.

6. Applies to the WRITE ENABLE/DISABLE, CLEAR FLAG STATUS REGISTER, WRITE EXTEN-

DED ADDRESS REGISTER, WRITE LOCK REGISTER, ENTER or EXIT 4-BYTE ADDRESS MODE,

WRITE VOLATILE or ENHANCED VOLATILE CONFIGURATION REGISTER operation.

7. Applies to the READ STATUS REGISTER or READ FLAG STATUS REGISTER operation.

8. Applies to the PROGRAM SUSPEND or ERASE SUSPEND operation.

PROGRAM/ERASE RESUME Command

To initiate the PROGRAM/ERASE RESUME command, S# is driven LOW. The command

code is input on DQ0. The operation is terminated by driving S# HIGH.

When this command is executed, the status register write in progress bit is set to 1, and

the flag status register program erase controller bit is set to 0. This command is ignored

if the device is not in a suspended state.

1.8V, 256Mb: Multiple I/O Serial Flash Memory

ERASE Operations

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RESET Operations

Table 30: Reset Command Set

Command Command Code (Binary) Command Code (Hex) Address Bytes

RESET ENABLE 0110 0110 66 0

RESET MEMORY 1001 1001 99 0

RESET ENABLE and RESET MEMORY Command

To reset the device, the RESET ENABLE command must be followed by the RESET

MEMORY command. To execute each command, S# is driven LOW. The command code

is input on DQ0. A minimum de-selection time of tSHSL2 must come between the RE-

SET ENABLE and RESET MEMORY commands or a reset is not guaranteed. When these

two commands are executed and S# is driven HIGH, the device enters a power-on reset

condition. A time of tSHSL3 is required before the device can be re-selected by driving

S# LOW. It is recommended that the device exit XIP mode before executing these two

commands to initiate a reset.

If a reset is initiated while a WRITE, PROGRAM, or ERASE operation is in progress or

suspended, the operation is aborted and data may be corrupted.

Figure 34: RESET ENABLE and RESET MEMORY Command

DQ0

01234567 01234567

Reset enable Reset memory

Note: 1. The number of lines and rate for transmission varies with extended, dual, or quad SPI.

RESET Conditions

All volatile lock bits, the volatile configuration register, the enhanced volatile configura-

tion register, and the extended address register are reset to the power-on reset default

condition. The power-on reset condition depends on settings in the nonvolatile config-

uration register.

1.8V, 256Mb: Multiple I/O Serial Flash Memory

RESET Operations

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(pincron‘ 1232/“: (a

ONE TIME PROGRAMMABLE Operations

READ OTP ARRAY Command

To initiate a READ OTP ARRAY command, S# is driven LOW. The command code is in-

put on DQ0, followed by address bytes and dummy clock cycles. Each address bit is

latched in during the rising edge of C. Data is shifted out on DQ1, beginning from the

specified address and at a maximum frequency of fC (MAX) on the falling edge of the

clock. The address increments automatically to the next address after each byte of data

is shifted out. There is no rollover mechanism; therefore, if read continuously, after lo-

cation 0x64, the device continues to output data at location 0x64. The operation is ter-

minated by driving S# HIGH at any time during data output.

Figure 35: READ OTP Command

7 8 Cx

MSB

DQ0

LSB

Command

A[MAX]

A[MIN]

3 4 Cx

MSB

DQ[1:0]

LSB

Command

A[MAX]

A[MIN]

MSB

DOUT DOUT DOUT DOUT DOUT

LSB

Dummy cycles

1 2 Cx

MSB

DQ[3:0]

LSB

Command

A[MAX]

A[MIN]

MSB

DOUT DOUT DOUT

LSB

Dummy cycles

Extended

MSB

DOUT DOUT DOUT DOUT DOUT

LSB

DOUT DOUT DOUT DOUT

Dummy cycles

Dual

Quad

DQ1 High-Z

Don’t Care

Note: 1. For extended SPI protocol, Cx = 7 + (A[MAX] + 1).

For dual SPI protocol, Cx = 3 + (A[MAX] + 1)/2.

For quad SPI protocol, Cx = 1 + (A[MAX] + 1)/4.

PROGRAM OTP ARRAY Command

To initiate the PROGRAM OTP ARRAY command, the WRITE ENABLE command must

be issued to set the write enable latch bit to 1; otherwise, the PROGRAM OTP ARRAY

command is ignored and flag status register bits are not set. S# is driven LOW and held

LOW until the eighth bit of the last data byte has been latched in, after which it must be

driven HIGH. The command code is input on DQ0, followed by address bytes and at

least one data byte. Each address bit is latched in during the rising edge of the clock.

When S# is driven HIGH, the operation, which is self-timed, is initiated; its duration is

tPOTP. There is no rollover mechanism; therefore, after a maximum of 65 bytes are

latched in and subsequent bytes are discarded.

PROGRAM OTP ARRAY programs, at most, 64 bytes to the OTP memory area and one

OTP control byte. When the operation is in progress, the write in progress bit is set to 1.

1.8V, 256Mb: Multiple I/O Serial Flash Memory

ONE TIME PROGRAMMABLE Operations

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The write enable latch bit is cleared to 0, whether the operation is successful or not, and

the status register and flag status register can be polled for the operation status. When

the operation completes, the write in progress bit is cleared to 0.

If the operation times out, the write enable latch bit is reset and the program fail bit is

set to 1. If S# is not driven HIGH, the command is not executed, flag status register error

bits are not set, and the write enable latch remains set to 1.

The OTP control byte (byte 64) is used to permanently lock the OTP memory array.

Table 31: OTP Control Byte (Byte 64)

Bit Name Settings Description

0 OTP control byte 0 = Locked

1 = Unlocked

(Default)

Used to permanently lock the 64B OTP array. When bit 0 = 1, the 64B OTP

array can be programmed. When bit 0 = 0, the 64B OTP array is read only.

Once bit 0 has been programmed to 0, it can no longer be changed to 1.

PROGRAM OTP ARRAY is ignored, write enable latch bit remains set, and

flag status register bits 1 and 4 are set.

1.8V, 256Mb: Multiple I/O Serial Flash Memory

ONE TIME PROGRAMMABLE Operations

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Figure 36: PROGRAM OTP Command

7 8 Cx

MSB

DQ0

LSB

Command

A[MAX]

A[MIN]

MSB

DIN DIN DIN DIN DIN

LSB

DIN DIN DIN DIN

3 4 Cx

MSB

DQ[1:0]

LSB

Command

A[MAX]

A[MIN]

MSB

DIN DIN DIN DIN DIN

LSB

1 2 Cx

MSB

DQ[3:0]

LSB

Command

A[MAX]

A[MIN]

MSB

DIN DIN DIN

LSB

Extended

Dual

Quad

Note: 1. For extended SPI protocol, Cx = 7 + (A[MAX] + 1).

For dual SPI protocol, Cx = 3 + (A[MAX] + 1)/2.

For quad SPI protocol, Cx = 1 + (A[MAX] + 1)/4.

1.8V, 256Mb: Multiple I/O Serial Flash Memory

ONE TIME PROGRAMMABLE Operations

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ADDRESS MODE Operations – Enter and Exit 4-Byte Address Mode

ENTER or EXIT 4-BYTE ADDRESS MODE Command

Both ENTER 4-BYTE ADDRESS MODE and EXIT 4-BYTE ADDRESS MODE commands

share the same requirements.

To enter or exit the 4-byte address mode, the WRITE ENABLE command must be execu-

ted to set the write enable latch bit to 1.

Note: The WRITE ENABLE command is not necessary for line items that enable the ad-

ditional RESET# pin.

S# must be driven LOW. The command must be input on DQn. The effect of the com-

mand is immediate; after the command has been executed, the write enable latch bit is

cleared to 0.

The default address mode is three bytes, and the device returns to the default upon exit-

ing the 4-byte address mode.

ENTER or EXIT QUAD Command

The ENTER or EXIT QUAD command is only available for line items that enable the ad-

ditional RESET# pin.

To initiate this command, S# must be driven LOW, and the command must be input on

DQn. The effect of the command is immediate.

Note: The WRITE ENABLE command must not be executed before this command.

1.8V, 256Mb: Multiple I/O Serial Flash Memory

ADDRESS MODE Operations – Enter and Exit 4-Byte Address

Mode

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XIP Mode

Execute-in-place (XIP) mode allows the memory to be read by sending an address to the

device and then receiving the data on one, two, or four pins in parallel, depending on

the customer requirements. XIP mode offers maximum flexibility to the application,

saves instruction overhead, and reduces random access time.

Activate or Terminate XIP Using Volatile Configuration Register

Applications that boot in SPI and must switch to XIP use the volatile configuration reg-

ister. XIP provides faster memory READ operations by requiring only an address to exe-

cute, rather than a command code and an address.

To activate XIP requires two steps. First, enable XIP by setting volatile configuration reg-

ister bit 3 to 0. Next, drive the XIP confirmation bit to 0 during the next FAST READ op-

eration. XIP is then active. Once in XIP, any command that occurs after S# is toggled re-

quires only address bits to execute; a command code is not necessary, and device oper-

ations use the SPI protocol that is enabled. XIP is terminated by driving the XIP confir-

mation bit to 1. The device automatically resets volatile configuration register bit 3 to 1.

Note: For devices with basic XIP, indicated by a part number feature set digit of 2 or 4, it

is not necessary to set the volatile configuration register bit 3 to 0 to enable XIP. Instead,

it is enabled by setting the XIP confirmation bit to 0 during the first dummy clock cycle

after any FAST READ command.

Activate or Terminate XIP Using Nonvolatile Configuration Register

Applications that must boot directly in XIP use the nonvolatile configuration register. To

enable a device to power-up in XIP using the nonvolatile configuration register, set non-

volatile configuration register bits [11:9]. Settings vary according to protocol, as ex-

plained in the Nonvolatile Configuration Register section. Because the device boots di-

rectly in XIP, the confirmation bit is already set to 0, and after the next power cycle, XIP

is active. Once in XIP, a command code is unnecessary, and device operations use the

SPI protocol currently enabled. XIP is terminated by driving the XIP confirmation bit to

1.8V, 256Mb: Multiple I/O Serial Flash Memory

XIP Mode

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mmy (y

Figure 37: XIP Mode Directly After Power-On

VCC

DQ0

DQ[3:1]

DOUT

Xb DOUT DOUT DOUT DOUT

DOUT DOUT DOUT DOUT DOUT

0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16

tVSI (<100µ)

NVCR check:

XIP enabled

Dummy cycles

Mode 3

Mode 0

A[MAX] MSB

A[MIN] LSB

Note: 1. Xb is the XIP confirmation bit and should be set as follows: 0 to keep XIP state; 1 to exit

XIP mode and return to standard read mode.

Confirmation Bit Settings Required to Activate or Terminate XIP

The XIP confirmation bit setting activates or terminates XIP after it has been enabled or

disabled. This bit is the value on DQ0 during the first dummy clock cycle in the FAST

READ operation. XIP requires at least one additional clock cycle to send the XIP confir-

mation bit to the memory on DQ0 during the first dummy clock cycle.

Table 32: XIP Confirmation Bit

Bit Value Description

0 Activates XIP: While this bit is 0, XIP remains activated.

1 Terminates XIP: When this bit is set to 1, XIP is terminated and the device returns to SPI.

Table 33: Effects of Running XIP in Different Protocols

Protocol Effect Notes

Extended I/O,

Dual I/O

In a device with a dedicated part number where RST# is enabled, a LOW pulse on RST#

resets XIP and the device to the state it was in previous to the last power-up, as defined

by the nonvolatile configuration register.

Dual I/O Values of DQ1 during the first dummy clock cycle are "Don't Care."

Quad I/O Values of DQ[3:1] during the first dummy clock cycle are "Don't Care."

In a device with a dedicated part number where RST# is enabled, a LOW pulse on RST#

resets XIP and the device to the state it was in previous to the last power-up, as defined

by the nonvolatile configuration register.

Note: 1. In a device with a dedicated part number, memory can be reset only when the device is

deselected.

1.8V, 256Mb: Multiple I/O Serial Flash Memory

XIP Mode

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Terminating XIP After a Controller and Memory Reset

The system controller and the device can become out of synchronization if, during the

life of the application, the system controller is reset without the device being reset. In

such a case, the controller can reset the memory to power-on reset if the memory has

reset functionality. (Reset is available in devices with a dedicated part number.)

If reset functionality is not available, has been disabled, or is not supported by the con-

troller, the controller must execute the following sequence to terminate XIP in the

memory device. In quad I/O protocol, drive DQ0 = 1 with S# held LOW for seven clock

cycles; S# must driven HIGH before the eighth clock cycle. In dual I/O protocol, drive

DQ0 = 1 with S# held LOW for 13 clock cycles; S# must driven HIGH before the four-

teenth clock cycle. If the device is in extended protocol, drive DQ0 = 1 with S# held LOW

for 25 clock cycles; S# must driven HIGH before the twenty-sixth clock cycle.

These sequences cause the controller to set the XIP confirmation bit to 1, thereby termi-

nating XIP. However, it does not reset the device or interrupt PROGRAM/ERASE opera-

tions that may be in progress. After terminating XIP, the controller must execute RESET

ENABLE and RESET MEMORY to implement a software reset and reset the device.

1.8V, 256Mb: Multiple I/O Serial Flash Memory

XIP Mode

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Power Up and Power Down

Power Up and Power Down Requirements

At power-up and power-down, the device must not be selected; that is, S# must follow

the voltage applied on VCC until VCC reaches the correct values: VCC,min at power-up and

VSS at power-down.

To avoid data corruption and inadvertent WRITE operations during power-up, a power-

on reset circuit is included. The logic inside the device is held to RESET while VCC is less

than the power-on reset threshold voltage shown here; all operations are disabled, and

the device does not respond to any instruction. During a standard power-up phase, the

device ignores all commands except READ STATUS REGISTER and READ FLAG STATUS

power-up, the device is in standby power mode; the write enable latch bit is reset; the

write in progress bit is reset; and the lock registers are configured as: (write lock bit, lock

down bit) = (0,0).

Normal precautions must be taken for supply line decoupling to stabilize the VCC sup-

ply. Each device in a system should have the VCC line decoupled by a suitable capacitor

(typically 100nF) close to the package pins. At power-down, when VCC drops from the

operating voltage to below the power-on-reset threshold voltage shown here, all opera-

tions are disabled and the device does not respond to any command.

Note: If power-down occurs while a WRITE, PROGRAM, or ERASE cycle is in pro-

gress, data corruption may result.

VPPH must be applied only when VCC is stable and in the VCC,min to VCC,max voltage

range.

Figure 38: Power-Up Timing

CC,min

Chip

reset

Chip selection not allowed

Polling allowed

VTW =

VTR

Time

Device fully accessible

CC,max

SPI protocol Starting protocol

defined by NVCR

WIP = 1

WEL = 0

WIP = 0

WEL = 0

1.8V, 256Mb: Multiple I/O Serial Flash Memory

Power Up and Power Down

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Table 34: Power-Up Timing and VWI Threshold

Note 1 applies to entire table

Symbol Parameter Min Max Unit

tVTR VCC,min to read – 150 µs

tVTW VCC,min to device fully accessible – 150 µs

VWI Write inhibit voltage 1.3 1.5 V

Note: 1. Parameters listed are characterized only.

Power Loss Recovery Sequence

If a power loss occurs during a WRITE NONVOLATILE CONFIGURATION REGISTER

command, after the next power-on, the device might begin in an undetermined state

(XIP mode or an unnecessary protocol). If this occurs, until the next power-up, a recov-

ery sequence must reset the device to a fixed state (extended SPI protocol without XIP).

After the recovery sequence, the issue should be resolved definitively by running the

WRITE NONVOLATILE CONFIGURATION REGISTER command again. The recovery se-

quence is composed of two parts that must be run in the correct order. During the en-

tire sequence, tSHSL2 must be at least 50ns. The first part of the sequence is DQ0 (PAD

DATA) and DQ3 (PAD HOLD) equal to 1 for the situations listed below:

• 7 clock cycles within S# LOW (S# becomes HIGH before 8th clock cycle)

• + 9 clock cycles within S# LOW (S# becomes HIGH before 10th clock cycle)

• + 13 clock cycles within S# LOW (S# becomes HIGH before 14th clock cycle)

• + 17 clock cycles within S# LOW (S# becomes HIGH before 18th clock cycle)

• + 25 clock cycles within S# LOW (S# becomes HIGH before 26th clock cycle)

• + 33 clock cycles within S# LOW (S# becomes HIGH before 34th clock cycle)

The second part of the sequence is exiting from dual or quad SPI protocol by using the

following FFh sequence: DQ0 and DQ3 equal to 1 for 8 clock cycles within S# LOW; S#

becomes HIGH before 9th clock cycle.

After this two-part sequence the extended SPI protocol is active.

Initial Delivery Status

The device is delivered as follows:

• Memory array erased: All bits are set to 1 (each byte contains FFh)

• Status register contains 00h (all status register bits are 0)

• Nonvolatile configuration register (NVCR) bits all erased (FFFFh)

1.8V, 256Mb: Multiple I/O Serial Flash Memory

Initial Delivery Status

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AC Reset Specifications

Table 35: AC RESET Conditions

Note 1 applies to entire table

Parameter Symbol Conditions Min Typ Max Unit

Reset pulse

width

tRLRH 2 50 – – ns

Reset recovery

time

tRHSL Device deselected (S# HIGH) and is in XIP mode – – 40 ns

Device deselected (S# HIGH) and is in standby mode – – 40 ns

Device deselected (S# HIGH) and is in deep power-down

mode

– – 30 µs

Commands are being decoded and any READ operation

or WRITE operation to volatile registers is in progress

– – 40 ns

Any device array PROGRAM/ERASE/SUSPEND/RESUME,

PROGRAM OTP, NONVOLATILE SECTOR LOCK, and ERASE

NONVOLATILE SECTOR LOCK ARRAY operations are in

progress

– – 30 µs

WRITE STATUS REGISTER operation is in progress – tW – ms

WRITE NONVOLATILE CONFIGURATION REGISTER opera-

tion is in progress

–tWNVCR – ms

On completion or suspension of a SUBSECTOR ERASE op-

eration

–tSSE – s

Software reset

recovery time

tSHSL3 Device deselected (S# HIGH) and is in standby mode – – 90 ns

Device deselected (S# HIGH) and is in deep power-down

mode

30 µs

On completion of any device array PROGRAM/ERASE/

SUSPEND/RESUME, SECTOR ERASE, PROGRAM OTP, PAGE

PROGRAM, DUAL INPUT FAST PROGRAM, EXTENDED

DUAL INPUT FAST PROGRAM, QUAD INPUT FAST PRO-

GRAM, or EXTENDED QUAD INPUT FAST PROGRAM op-

eration

– – 30 µs

On completion or suspension of a WRITE STATUS REGIS-

TER operation

–tW – ms

On completion or suspension of a WRITE NONVOLATILE

CONFIGURATION REGISTER operation

–tWNVCR – ms

On completion or suspension of a SUBSECTOR ERASE op-

eration

–tSSE – s

S# deselect to

reset valid

tSHRV Deselect to reset valid in quad output or in QIO-SPI 2 – – ns

Notes: 1. Values are guaranteed by characterization; not 100% tested.

2. The device reset is possible but not guaranteed if tRLRH < 50ns.

1.8V, 256Mb: Multiple I/O Serial Flash Memory

AC Reset Specifications

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‘s CH H VCH c DX H

Figure 39: Reset AC Timing During PROGRAM or ERASE Cycle

tSHRH

tRLRH

tRHSL

RESET#

Don’t Care

Figure 40: Reset Enable

DQ0

01234567 01234567

Reset enable Reset memory

Figure 41: Serial Input Timing

tSLCH

tCHSL

tDVCH tCHDX tCLCH

tCHCL

tCHSH tSHCH

tSHSL

DQ0

DQ1 High-Z High-Z

MSB in LSB in

Don’t Care

1.8V, 256Mb: Multiple I/O Serial Flash Memory

AC Reset Specifications

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Figure 42: Write Protect Setup and Hold During WRITE STATUS REGISTER Operation (SRWD = 1)

Don’t Care

High-Z High-Z

W#/VPP

DQ0

DQ1

tWHSL tSHWL

Figure 43: Hold Timing

tHLCH

tCHHL tHHCH

tHLQZ

tCHHH

tHHQX

DQ0

DQ1

HOLD#

Don’t Care

1.8V, 256Mb: Multiple I/O Serial Flash Memory

AC Reset Specifications

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P? T j NW J N M: ,D 7 )\ 777777 —/— \J U U WWI:::: H X :::

Figure 44: Output Timing

tCL tCH

DQ0

DQ1

LSB out

Address

LSB in

Don’t Care

tCLQX tCLQX tSHQZ

tCLQV tCLQV

Figure 45: VPPH Timing

DQ0

tVPPHSL

End of command

(identified by WIP polling)

VPPH

VPP

1.8V, 256Mb: Multiple I/O Serial Flash Memory

AC Reset Specifications

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Absolute Ratings and Operating Conditions

Stresses greater than those listed may cause permanent damage to the device. This is a

stress rating only. Exposure to absolute maximum rating for extended periods may ad-

versely affect reliability. Stressing the device beyond the absolute maximum ratings may

cause permanent damage.

Table 36: Absolute Ratings

Symbol Parameter Min Max Units Notes

TSTG Storage temperature –65 150 °C

TLEAD Lead temperature during soldering – See note 1 °C

VCC Supply voltage –0.6 2.4 V

VPP Fast program/erase voltage –0.2 10 V

VIO Input/output voltage with respect to ground –0.6 VCC + 0.6 V 3, 4

VESD Electrostatic discharge voltage

(human body model)

–2000 2000 V 2

Notes: 1. Compliant with JEDEC Standard J-STD-020C (for small-body, Sn-Pb or Pb assembly),

RoHS, and the European directive on Restrictions on Hazardous Substances (RoHS)

2002/95/EU.

2. JEDEC Standard JESD22-A114A (C1 = 100pF, R1 = 1500Ω, R2 = 500Ω).

3. During signal transitions, minimum voltage may undershoot to –1V for periods less than

10ns.

4. During signal transitions, maximum voltage may overshoot to VCC + 1V for periods less

than 10ns.

Table 37: Operating Conditions

Symbol Parameter Min Max Units

VCC Supply voltage 1.7 2.0 V

VPPH Supply voltage on VPP 8.5 9.5 V

TAAmbient operating temperature –40 85 °C

Table 38: Input/Output Capacitance

Note 1 applies to entire table

Symbol Description Test Condition Min Max Units

CIN/OUT Input/output capacitance

(DQ0/DQ1/DQ2/DQ3)

VOUT = 0V – 8 pF

CIN Input capacitance (other pins) VIN = 0V – 6 pF

Note: 1. These parameters are sampled only, not 100% tested. TA = 25°C at 54 MHz.

1.8V, 256Mb: Multiple I/O Serial Flash Memory

Absolute Ratings and Operating Conditions

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Table 39: AC Timing Input/Output Conditions

Symbol Description Min Max Units Notes

CLLoad capacitance 30 30 pF 1

– Input rise and fall times – 5 ns

Input pulse voltages 0.2VCC to 0.8VCC V 2

Input timing reference voltages 0.3VCC to 0.7VCC V

Output timing reference voltages VCC/2 VCC/2 V

Notes: 1. Output buffers are configurable by user.

2. For quad/dual operations: 0V to VCC.

Figure 46: AC Timing Input/Output Reference Levels

0.8VCC

0.2VCC

0.7VCC

0.5VCC

0.3VCC

Input levels1I/O timing

reference levels

Note: 1. 0.8VCC = VCC for dual/quad operations; 0.2VCC = 0V for dual/quad operations.

1.8V, 256Mb: Multiple I/O Serial Flash Memory

Absolute Ratings and Operating Conditions

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DC Characteristics and Operating Conditions

Table 40: DC Current Characteristics and Operating Conditions

Parameter Symbol Test Conditions Min Max Unit

Input leakage current ILI – ±2 µA

Output leakage current ILO – ±2 µA

Standby current ICC1 S = VCC, VIN = VSS or VCC – 100 µA

Deep power-down current ICC2 S = VCC, VIN = VSS or VCC – 20 µA

Operating current

(fast-read extended I/O)

ICC3 C = 0.1VCC/0.9VCC at 108 MHz, DQ1

= open

– 20 mA

C = 0.1VCC/0.9VCC at 54 MHz, DQ1

= open

– 6 mA

Operating current (fast-read dual I/O) C = 0.1VCC/0.9VCC at 108 MHz – 18 mA

Operating current (fast-read quad I/O) C = 0.1VCC/0.9VCC at 108 MHz – 20 mA

Operating current (program) ICC4 S# = VCC – 20 mA

Operating current (write status regis-

ter)

ICC5 S# = VCC – 20 mA

Operating current (erase) ICC6 S# = VCC – 20 mA

Table 41: DC Voltage Characteristics and Operating Conditions

Parameter Symbol Conditions Min Max Unit

Input low voltage VIL –0.5 0.3VCC V

Input high voltage VIH 0.7VCC VCC + 0.4 V

Output low voltage VOL IOL = 1.6mA – 0.4 V

Output high voltage VOH IOH = –100µA VCC - 0.2 – V

1.8V, 256Mb: Multiple I/O Serial Flash Memory

DC Characteristics and Operating Conditions

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AC Characteristics and Operating Conditions

Table 42: AC Characteristics and Operating Conditions

Parameter Symbol Min Typ1Max Unit Notes

Clock frequency for all commands other than

READ (SPI-ER, QIO-SPI protocol)

fC DC – 108 MHz

Clock frequency for READ commands fR DC – 54 MHz

Clock HIGH time tCH 4 – – ns 2

Clock LOW time tCL 4 – – ns 1

Clock rise time (peak-to-peak) tCLCH 0.1 – – V/ns 3, 4

Clock fall time (peak-to-peak) tCHCL 0.1 – – V/ns 3, 4

S# active setup time (relative to clock) tSLCH 4 – – ns

S# not active hold time (relative to clock) tCHSL 4 – – ns

Data in setup time tDVCH 2 – – ns

Data in hold time tCHDX 3 – – ns

S# active hold time (relative to clock) tCHSH 4 – – ns

S# not active setup time (relative to clock) tSHCH 4 – – ns

S# deselect time after a READ command tSHSL1 20 – – ns

S# deselect time after a nonREAD command tSHSL2 50 – – ns

Output disable time tSHQZ – – 8 ns 3

Clock LOW to output valid under 30pF STR tCLQV – – 7 ns

DTR – – 8 ns

Clock LOW to output valid under 10pF STR – – 5 ns

DTR – – 6 ns

Output hold time (clock LOW) tCLQX 1 – – ns

Output hold time (clock HIGH) tCHQX 1 – – ns

HOLD command setup time (relative to clock) tHLCH 4 – – ns

HOLD command hold time (relative to clock) tCHHH 4 – – ns

HOLD command setup time (relative to clock) tHHCH 4 – – ns

HOLD command hold time (relative to clock) tCHHL 4 – – ns

HOLD command to output Low-Z tHHQX – – 8 ns 3

HOLD command to output High-Z tHLQZ – – 8 ns 3

Write protect setup time tWHSL 20 – – ns 5

Write protect hold time tSHWL 100 – – ns 5

Enhanced VPPH HIGH to S# LOW for extended and

dual I/O page program

tVPPHSL 200 – – ns 6

WRITE STATUS REGISTER cycle time tW – 1.3 8 ms

Write NONVOLATILE CONFIGURATION REGISTER

cycle time

tWNVCR – 0.2 3 s

CLEAR FLAG STATUS REGISTER cycle time tCFSR – 40 – ns

1.8V, 256Mb: Multiple I/O Serial Flash Memory

AC Characteristics and Operating Conditions

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Table 42: AC Characteristics and Operating Conditions (Continued)

Parameter Symbol Min Typ1Max Unit Notes

WRITE VOLATILE CONFIGURATION REGISTER cycle

time

tWVCR – 40 – ns

WRITE VOLATILE ENHANCED CONFIGURATION

tWRVECR – 40 – ns

WRITE NONVOLATILE CONFIGURATION REGISTER

cycle time

tWNVCR – 0.2 3 s

WRITE EXTENDED ADDRESS REGISTER cycle time tWREAR – 40 – ns

PAGE PROGRAM cycle time (256 bytes) tPP – 0.5 5 ms 7

PAGE PROGRAM cycle time (n bytes) – int(n/8) ×

0.0158

5 ms 7

PAGE PROGRAM cycle time, VPP = VPPH ( 256 bytes) – 0.4 5 ms 7

PROGRAM OTP cycle time (64 bytes) – 0.2 – ms 7

Subsector ERASE cycle time tSSE – 0.25 0.8 s

Sector ERASE cycle time tSE – 0.7 3 s

Sector ERASE cycle time (with VPP = VPPH) – 0.6 3 s

Bulk ERASE cycle time tBE – 240 480 s

Bulk ERASE cycle time (with VPP = VPPH) – 200 480 s

S# to DEEP POWER-DOWN tDP – – 3 µs

S# HIGH to STANDBY tRDP – – 30 µs

Notes: 1. Typical values given for TA = 25°C.

2. tCH + tCL must add up to 1/fC.

3. Value guaranteed by characterization; not 100% tested.

4. Expressed as a slew-rate.

5. Only applicable as a constraint for a WRITE STATUS REGISTER command when STATUS

6. VPPH should be kept at a valid level until the PROGRAM or ERASE operation has comple-

ted and its result (success or failure) is known.

7. When using the PAGE PROGRAM command to program consecutive bytes, optimized

timings are obtained with one sequence including all the bytes versus several sequences

of only a few bytes (1 < n < 256).

8. int(A) corresponds to the upper integer part of A. For example int(12/8) = 2, int(32/8) = 4

int(15.3) = 16.

1.8V, 256Mb: Multiple I/O Serial Flash Memory

AC Characteristics and Operating Conditions

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“““““““““ “““““““““

Package Dimensions

Figure 47: V-PDFN-8/8mm x 6mm

8.00 TYP

6.00 TYP 4.80 TYP

5.16 TYP

0.2

MIN

0.40 ±0.05

Pin 1 ID

Ø0.3

1.27

TYP

0.05 MAX

0.40 +0.08

-0.05

0.85 TYP/

1 MAX

Pin 1 ID R 0.20

0.05 C

0.10 C

0.10 C A B

0.15 CA

0.15 C

0.05 C

(NE - 1) × 1.27 TYP

Notes: 1. All dimensions are in millimeters.

2. See Part Number Ordering Information for complete package names and details.

1.8V, 256Mb: Multiple I/O Serial Flash Memory

Package Dimensions

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ﬂcron‘ 10.30 $0.20 HHHHHHH' ~>H<~hx45°>

Figure 48: SOP2-16/300 mils

0.23 MIN/

0.32 MAX

0.40 MIN/

1.27 MAX

0.20 ±0.1

2.5 ±0.15

10.30 ±0.20

7.50 ±0.10

10.00 MIN/

10.65 MAX

0.33 MIN/

0.51 MAX

0.1 Z

0° MIN/8° MAX

1.27 TYP

h x 45°

Notes: 1. All dimensions are in millimeters.

2. See Part Number Ordering Information for complete package names and details.

1.8V, 256Mb: Multiple I/O Serial Flash Memory

Package Dimensions

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ECG] , <7 4»="">

Figure 49: T-PBGA-24b05/6mm x 8mm

Ball A1 ID

1.20 MAX

6 ±0.10

0.20 MIN

1.00 TYP

8 ±0.10

4.00

Ball A1 ID

4.00

0.79 TYP

Seating

plane

0.1 A

24X Ø0.40 ±0.05

5 4 3 2 1

Notes: 1. All dimensions are in millimeters.

2. See Part Number Ordering Information for complete package names and details.

1.8V, 256Mb: Multiple I/O Serial Flash Memory

Package Dimensions

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Part Number Ordering Information

Micron Serial NOR Flash devices are available in different configurations and densities.

Verify valid part numbers by using Micron’s part catalog search at micron.com. To com-

pare features and specifications by device type, visit micron.com/products. Contact the

factory for devices not found.

For more information on how to identify products and top-side marking by the process

identification letter, refer to technical note TN-12-24, "Serial Flash Memory Device

Marking for the M25P, M25PE, M25PX, and N25Q Product Families."

Table 43: Part Number Information

Part Number

Category Category Details Notes

Device type N25Q = Serial NOR Flash memory, Multiple Input/Output (Single, Dual, Quad I/O), XIP –

Density 256 = 256Mb –

Technology A = 65nm –

Feature set 1 = Byte addressable; HOLD pin; Micron XIP 1

2 = Byte addressable; HOLD pin; Basic XIP 1

3 = Byte addressable; RST# pin; Micron XIP 1

4 = Byte addressable; RST# pin; Basic XIP 1

7 = Byte addressable; HOLD pin; Micron XIP 2

8 = Byte addressability; RESET# pin; HOLD pin; Micron XIP –

Operating voltage 1 = VCC = 1.7 to 2.0V –

Block structure E = Uniform (64KB and 4KB) –

Package

(RoHS-compliant)

F8 = V-PDFN-8/8mm x 6mm

SF = SOP2-16/300 mil

12 = T-PBGA-24b05/6mm x 8mm

Temperature and

test flow

4 = IT: –40°C to 85°C; Device tested with standard test flow

A = Automotive temperature range, –40 to 125°C; Device tested with high reliability

certified test flow

H = IT: –40°C to 85°C; Device tested with high reliability certified test flow

–

Security features 0 = Default 4

Shipping material E = Tray

F = Tape and reel

G = Tube

–

Notes: 1. Enter and exit 4-byte address mode are supported.

2. 4-byte address mode is the default at power-up. Enter and exit 4-byte address mode are

not supported.

3. See the table below for additional information.

4. Additional secure options are available upon customer request.

1.8V, 256Mb: Multiple I/O Serial Flash Memory

Part Number Ordering Information

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Table 44: Package Details

Names

Description

Symbol

Micron SPI and

JEDEC Shortened M25P and M45PE Alternate

M25P

M45PE N25Q

V-PDFN-8/8mm x

6mm RP

DFN-8/8mm MLP8, VDFPN8 V-PSON1-8/8mm x

6mm, VSON

Very thin, plastic small-

outline, 8 terminal pads

(no leads), 8mm x 6mm

ME F8

SOP2-16/300mil SO16W SO16W, SO16 wide

300 mil body width

SOIC-16/300 mil,

SOP 16L 300 mil

Small-outline integrated

circuit, 16-pin, wide (300

mil)

MF SF

T-PBGA-24b05/6x8 TBGA 24 TBGA24 6mm x

8mm

T-PBGA-24b05/6x8 Thin, plastic-ball grid ar-

ray, 24-ball, 6mm x 8mm

ZM 12

1.8V, 256Mb: Multiple I/O Serial Flash Memory

Part Number Ordering Information

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Revision History

Rev. O – 11/16

• Changed data byte for Read and Write extended address register in Command Defini-

tions section

• Added Initial Delivery Status section

Rev. N – 05/16

• Changed Typ PAGE PROGRAM cycle time (n bytes)

Rev. M – 03/14

• In Command Set table, updated value for Quad I/O FAST READ – DTR from 3Dh to

6Dh

Rev. L – 01/14

• Revised Command Definitions table notes.

• Added information for part numbers that enable the RESET# pin.

• Added the following to part number table: 8 = Byte addressable; RESET# pin; HOLD

pin; Micron XIP

• Corrected RESET ENABLE and RESET MEMORY command timing diagram

Rev. K – 09/13

• Corrected block protection tables

Rev. J – 01/13

• Updated the READ ID Operation figure in READ ID Operations

• Updated ERASE Operations

• Added link to part number chart in Part Number Ordering Information

• Updated part numbers in Features

Rev. I – 07/12

• Updated Nonvolatile Configuration Register Bit Definitions table

• Updated DC Current Characteristics and Operating Conditions table, ICC2 and ICC3

max

• Updated V-PDFN-8/8mm x 6mm package drawing

Rev. H – 06/12

• Typo fix in Supported Clock Frequencies – DTR table in Nonvolatile and Volatile Reg-

isters

• Updated tSSE specification in AC Reset Conditions table

• Updated Memory Type specification in Read ID Data Out table

1.8V, 256Mb: Multiple I/O Serial Flash Memory

Revision History

09005aef846a804a

n25q_256mb_1_8V_65nm.pdf - Rev. O 11/16 EN 88 Micron Technology, Inc. reserves the right to change products or specifications without notice.

Rev. G, Production – 02/12

• Added W# information to the WRITE STATUS REGISTER command section

Rev. F, Production – 02/12

• Added deep power-down to AC Reset specifications

Rev. E, Production – 01/12

• Updated DUAL INPUT/OUTPUT FAST READ – DTR third code and added note 11;

added note 12 to QUAD INPUT/OUTPUT FAST READ – DTR in the Command Set ta-

ble

• Updated VWI min and max specs in the Power-Up Timing and VWI Threshold table

Rev. D, Production – 09/11

• Micron rebrand

Rev. C – 11/10

• Added Reset Enable; Read Extended Address Register, Dual I/O; Reset Enable and Re-

set Memory, Dual I/O; Read Extended Address Register, Quad I/O; Reset Enable and

Reset Memory, Quad I/O

Rev. B – 08/10

• Added information to clarify 4-Byte Address Mode; added reset information, includ-

ing the Reset Enable figure and new rows in the Reset Conditions table

Rev. A – 06/10

• Initial release

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www.micron.com/products/support Sales inquiries: 800-932-4992

Micron and the Micron logo are trademarks of Micron Technology, Inc.

All other trademarks are the property of their respective owners.

This data sheet contains minimum and maximum limits specified over the power supply and temperature range set forth herein.

Although considered final, these specifications are subject to change, as further product development and data characterization some-

times occur.

1.8V, 256Mb: Multiple I/O Serial Flash Memory

Revision History

09005aef846a804a

n25q_256mb_1_8V_65nm.pdf - Rev. O 11/16 EN 89 Micron Technology, Inc. reserves the right to change products or specifications without notice.

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