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Skywire® CAT M1 Brief

NimbeLink, LLC

Download PDF Datasheet

Datasheet

Skywire® LTE CAT-M1
Embedded Cellular Modem
Datasheet
NimbeLink Corp
Updated: December 2018
PN 30163 rev 12 © NimbeLink Corp. 2018. All rights reserved. 1
Table of Contents
Introduction 3
Orderable Part Numbers 3
Product Overview 3
Block Diagram 3
Technical Specifications 4
Electrical Specifications 4
Absolute Maximum Ratings 4
Recommended Ratings & Module Pin out 4
Connectors J1 and J2 4
Connectors J3, X1, X2 5
Typical Power Consumption 6
Mechanical Specifications 7
Mechanical Characteristics 7
Mating Connectors 7
Device Placement 7
Environmental Specifications 7
Important Design Considerations 8
ON_OFF Signal 8
Power Supply Requirements 8
Serial Communications 8
Baud Rate 8
FOTA 8
Mounting Guidelines 9
Board to Board connectors approach 9
Solder to Board connection approach 10
Antenna Considerations 11
Primary Antenna Requirements 11
Recommended Antennas 11
Certifications 12
Carrier Specific 12
Geography Specific 12
Federal Regulatory Licensing 12
End Product Labeling Requirements 12
PN 30163 rev 12 © NimbeLink Corp. 2018. All rights reserved. 2
1. Introduction
1.1 Orderable Part Numbers
Orderable Device
Firmware
Revision
Operating Temp
Bands
Network
Type
NL-SW-LTE-SVZM20
LR5.1.1.0-32110
-40 to +85˚C
B4, B13
Verizon
NL-SW-LTE-SVZM20-B
LR5.1.1.0-37120
-40 to +85˚C
B4, B13
Verizon
1.2 Product Overview
Add robust cellular connectivity to your M2M devices with scalable radio technology with
the Skywire® line of modems, including CAT-M1 based LTE solutions. Extensive
experience in designing and building embedded product solutions makes the NimbeLink
Skywire embedded cellular modem the smallest on the market. It complies with the
Skywire standard interface and supports multiple LTE bands minimizing costs of
hardware and network access. The module is designed for volume production and is
intended for OEMs to embed into end equipment designs.
1.3 Block Diagram
PN 30163 rev 12 © NimbeLink Corp. 2018. All rights reserved. 3
2. Technical Specifications
2.1 Electrical Specifications
2.1.1 Absolute Maximum Ratings
Parameter
Signal
Maximum Rating
Main Power Supply
VCC
5.1V
I/O Voltage Reference
VREF
5.5V
2.1.2 Recommended Ratings & Module Pin out
2.1.2.1 Connectors J1 and J2
Pin
Description
Min
Typical
Max
If not used
1
Main Power supply
3.1V
3.8V
4.5V
Must be implemented.
2
UART data out, I/O level tied to VREF
VOL:
GND to
0.55V
VOH:
VREF x
0.67 to
VREF
Must be implemented.
3
UART data in, I/O level tied to VREF
VIL:
GND to
0.15V
VIH:
VREF-0.4V
to VREF
Must be implemented.
4
Ground Pin
0
Must be implemented.
5
Controls RESET_N input on modem,
tie low for a minimum of 1uS and
released to activate. Internally pulled
up to 1.8V. Drive with open collector
output. Assert only in an emergency
as the modem will not gracefully exit
the cellular network when asserted.
0
1.8V
Must be implemented.
6
Supply for USB interface
3.0V
5V
5.5V
No connection if not
used.
7
USB differential Data + signal
No connection if not
used.
8
USB differential Data - signal
No connection if not
used.
9
Wakes up the modem from low power
modes. Default configuration for
wakeup is a low to high transition on
this line
VIL:
GND to
0.15V
VIH:
VREF-0.4V
to VREF
Tie to GND.
10
Ground Pin
0
Must be implemented.
PN 30163 rev 12 © NimbeLink Corp. 2018. All rights reserved. 4
Pin
Description
Min
Typical
Max
If not used
11
Ground Pin
0
Must be implemented.
12
Modem Clear to Send hardware flow
control output
VOL:
GND to
0.55V
VOH:
VREF x
0.67 to
VREF
No connection if not
used.
13
Signal drives high indicating the
modem is on and ready for
commands. (It can be idle, or in sleep
mode)
0
1.8V
No connection if not
used.
14
Voltage reference for off board I/O
signals. This signal drives the input
voltage side of an onboard buffer
which converts all external I/O voltage
from VREF range to 1.8V range to
drive the onboard cellular module.
1.65V
1.8V or
3.3V
5.5V
Must be implemented.
15
Ground Pin
0
Must be implemented.
16
Modem Request to Send hardware
flow control input
VIL:
GND to
0.15V
VIH:
VREF-0.4V
to VREF
Tie to GND
17
Reserved.
No connection if not
used.
18
Reserved.
No connection if not
used.
19
Signal wakes up a host processor
when there is incoming traffic on the
network
VOL:
GND to
0.55V
VOH:
VREF x
0.67 to
VREF
No connection if not
used.
20
The modem will always boot up when
power is applied, so this pin can be
left floating. For more information,
see Section 3.1.
Leave floating.
2.1.2.2 Connectors J3, X1, X2
Connector Designator
Description
Connector Location
J3
Micro SIM Connector
Bottom Side of Modem
X1
Primary Antenna Connection
Top side of Modem
PN 30163 rev 12 © NimbeLink Corp. 2018. All rights reserved. 5
2.1.2.3 Typical Power Consumption
Mode
Attenuation
(dB)
RSRQ
RSRP
Average
Current
(mA)
Peak
Current
(mA)
Average
Charge
(µAh)
Measurement Notes
Active
Socket Dial
0
21
72
183.04
196.69
291.60
Tested at: 3.8V
Time elapsed: 5.74s
Test: Open socket, HTTP POST, read
HTTP response, power off
Active
Socket Dial
20
14
50
183.63
404.21
297.69
Tested at 3.8V
Time elapsed: 5.84s
Test: Open socket, HTTP POST, read
HTTP response, power off
Active
Socket Dial
40
14
30
191.58
514.44
310.94
Tested at 3.8V
Time elapsed: 5.85s
Test: Open socket, HTTP POST, read
HTTP response, power off
Off
0
12
64
5.349
(µA)
5.702
(µA)
446.940
(nAh)
Tested at 3.8V
Test: Issued AT+SQNSSHDN, RTS and
WAKE held HIGH, 5 minute sample
Idle
0
12
64
187.46
497.62
15.61
Tested at 3.8V
Test: Powered on and registered on
the network
Start PSM
Countdown
0
16
62
178.62
198.94
878.11
Tested at 3.8V
Test: Issue PSM commands, RTS and
WAKE held HIGH, 16 second timer
from network, 17.72 seconds to
enter pre-PSM
Pre-PSM
Mode
0
16
62
2.06
168.72
55.19
Tested at 3.8V
Test: Skywire will stay in this mode
for about 90 seconds in case AT
interface is needed again. It is more
power efficient to stay in this mode
in the event of needing the interface
sooner. RTS and WAKE held HIGH,
elapsed time 94.01 seconds
PSM
0
16
62
6.606
(µA)
118.18
(µA)
345.85
(nAh)
Tested at: 3.8V
Test: PSM state, RTS and WAKE held
HIGH, 189 second sample
PN 30163 rev 12 © NimbeLink Corp. 2018. All rights reserved. 6
2.2 Mechanical Specifications
2.2.1 Mechanical Characteristics
Parameter
Typical
Unit
Dimensions (excluding pin height, for solder to board applications)
29.0 x 33.60 x 6.63
mm
Dimensions (including pin height, for board to board connector applications)
29.0 x 33.60 x 10.73
mm
Weight
0.3
oz
Connector Insertion/Removal
hundreds
Cycles
2.2.2 Mating Connectors
Connector
Designator
Manufacturer
Populated on
Module
Recommended
Mate
Mate Manufacture
J1, J2
3M
951110-2530-AR-PR
950510-6102-AR
3M
Acceptable
alternate:
NPPN101BFCN-RC
Sullins Connector
Solutions
J3
Molex
786463001
Micro SIM Card
Micro SIM Card
X1, X2
Hirose
U.FL-R-SMT(10)
CAB.011
Taoglas
2.2.3 Device Placement
Make sure the Skywire is installed in the correct orientation; failure to do so
will damage the device and void the warranty.
2.3 Environmental Specifications
Parameter
Min
Typical
Max
Unit
Note
Operating Temperature
-30
25
+60
˚C
Extended Temperature*
-40
25
+85
˚C
Operating Humidity
20
90
%
Non-condensing
* Transmit power limited during Extended Temperature operation
PN 30163 rev 12 © NimbeLink Corp. 2018. All rights reserved. 7
3. Important Design Considerations
3.1 ON_OFF Signal
By default, the modem will boot up as soon as power is applied, with no way to change
this behavior. Therefore, the ‘ON_OFF’ pin can be ignored in all designs.
Instead of asserting a signal on the ‘ON_OFF’ pin, follow the instructions below to start,
restart, and shutdown the device:
In order to turn on the modem, simply apply power. To turn off the modem, issue the
following command:
AT+SQNSSHDN
This command will gracefully shut down the device. Finally, to restart the modem after it
has been shut down using the aforementioned AT command, assert a logic low state on
the RESET_N pin for at least one microsecond.
3.2 Power Supply Requirements
The modem will regularly consume high amounts of current on the Main Power Supply
(VCC), up to 500mA during active transmits and receives. The baseboard power supply
should be designed to support peak currents up to 1 Amp. A 100uF capacitor should be
placed near the VCC pin on the modem to ensure ample energy is available, with a low
inductance path to the VCC pin. For example power supply designs, there are multiple
references available. See the NimbeLink Skywire Development Kit schematic for a
switching regulator example.
3.3 Serial Communications
The Skywire Modem can communicate over UART for AT commands and PPP
interface. The SVZM20-B firmware defaults the USB port to an AT command interface.
Earlier versions of the firmware on the SVZM20 do not enable this.
3.4 Baud Rate
The default baud rate of the NL-SW-LTE-SVZM20 and NL-SW-LTE-SVZM20-B is
921600 baud 8N1. Please make sure to change the settings of your terminal program to
reflect this.
3.5 FOTA
LTE networks are constantly being updated, improved, and enhanced with new
features. As a result, carriers are making frequent network changes. Most will not
negatively affect devices connected to those networks, but occasionally an update will
prevent an unprepared device from re-connecting to the network permanently.
PN 30163 rev 12 © NimbeLink Corp. 2018. All rights reserved. 8
To account for these future changes, FOTA (Firmware over the Air) capability is being
added to all cellular modules by each module manufacturer, and NimbeLink supports
this functionality in the Skywire family of embedded modems. However, there is often a
requirement to implement support for this FOTA functionality in your device firmware.
As a developer using the Skywire modem, it is required that your device firmware plan
to accommodate FOTA updates after deployment. Failure to do so may result in
interruption of your device's cellular connectivity if the carriers implement a network
change. If the device can no longer access the network, FOTA cannot be used to
resolve the situation after the fact. The only way to restore connectivity will be physical
access to the device to perform the updates directly on the device.
FOTA Instructions are available by contacting Nimbelink's product support team at
product.support@nimbelink.com.
4. Mounting Guidelines
The Skywire embedded cellular modem supports multiple connection methods, the two
primary methods are board to board connectors and soldering directly to the baseboard.
4.1 Board to Board connectors approach
The Skywire form factor calls for two, 10 pin, 2mm pitch female receptacles.
There are many connector manufacturers that can be used; below is one readily
available product:
Manufacturer: 3M Alternate: Sullins Connector Solutions
Part Number: 950510-6102-AR Alternate P/N: NPPN101BFCN-RC
Typical part drawing and footprint information:
PN 30163 rev 12 © NimbeLink Corp. 2018. All rights reserved. 9
4.2 Solder to Board connection approach
The modem can be soldered directly to a PCB. The PCB should be designed with two
rows of ten, 0.8mm plated thru holes spaced 2mm apart. The two rows should be
22mm apart. See drawing for recommended footprint. Measurements are in
millimeters. U.FL locations are marked with circles, X1 and X2 on top side of board, J3
is Micro SIM card slot on bottom side of board.
PN 30163 rev 12 © NimbeLink Corp. 2018. All rights reserved. 10
5. Antenna Considerations
5.1 Primary Antenna Requirements
Designers should review latest VZM20Q Hardware User Guide to ensure the
information is up to date.
PRIMARY ANTENNA REQUIREMENTS
Frequency Range
Depending on the frequency bands provided by the network
operator, the customer shall use the most suitable antenna for those
bands
Bandwidth
LTE B4(1700): 445 MHz
LTE B13(700c): 41 MHz
Impedance
50 ohm
Input Power
>24dB
5.2 Recommended Antennas
Function
Antenna Type
Manufacturer
Part Number
Primary Cellular
Monopole
Taoglas1
TG.08.0113
Primary Cellular
Dipole
Taoglas1
TG.30.8113
Note 1: U.FL to SMA adapter required.
For applications not using the recommended antennas, developers must ensure that the
selected antenna(s) meet certain requirements. In order to maintain FCC and carrier
specific certifications the antennas cannot exceed the maximum gain levels listed here:
Frequency
Max Gain (dBi)
700 MHz Band
10.0
1700 MHz Band
6.0
PN 30163 rev 12 © NimbeLink Corp. 2018. All rights reserved. 11
6. Certifications
6.1 Carrier Specific
NL-SW-LTE-SVZM: Verizon OD Certified
6.2 Geography Specific
Federal Communications Commission (FCC47) part 22, 24
Complies with FCC47 Part 15 Class B Radiated and Conducted Emissions
7. Federal Regulatory Licensing
7.1 Export Control Classification Number (ECCN)
ECCNs are five character alphanumeric designations used on the Commerce Control
List (CCL) to identify dual-use items for export control purposes. An ECCN categorizes
items based on the nature of the product, i.e. type of commodity, software, or
technology and its respective technical parameters.
NL-SW-LTE-SVZM (and all Skywire Modems): 5A992.c
7.2 Harmonized Tariff Schedule Code
HTS Code: 8517.62.0010
8. End Product Labeling Requirements
Device Uses Approved Radio: NL-SW-LTE-SVZM
Contains FCC ID: 2AAGMVZM20Q
This device complies with Part 15 of the FCC Rules. Operation is subject to the
following two conditions: (1) This device may not cause harmful interferences, and (2)
this device must accept any interference received, including interference that may
cause undesired operation.
PN 30163 rev 12 © NimbeLink Corp. 2018. All rights reserved. 12

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