RN4020 PICtail™/PICtail Plus Brd Guide Datasheet by Microchip Technology

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‘3‘ MICROCHIP
2014 Microchip Technology Inc. DS50002265A-page 1
OVERVIEW
The RN4020 PICtail Plus Daughter Board is a
Bluetooth® Low Energy demonstration board that
showcases the Microchip RN4020 Certified Bluetooth
Low Energy (BTLE) module. The RN4020 module is a
single-mode Bluetooth Smart module that complies
with Bluetooth Core Specification 4.0. The high-speed
UART interface and the General Purpose Input Output
(GPIO) Ports are available on the RN4020 module to
configure, control and transfer data.
The RN4020 PICtail Plus Daughter Board has PICtail
Plus and PICtail connectors to interface with a PIC®
microcontroller (MCU) on the development boards that
support PICtail Plus or PICtail interface with the
required pin mapping. The PICtail board also has a
PIC18 USB-to-UART serial bridge on the board to
enable easy serial connection to a PC over USB. The
PIC18 also exposes a command shell to control its
GPIO ports.
FEATURES
Microchip RN4020 Certified Bluetooth Low
Energy (BTLE) module
PICtail Plus Daughter Board or PICtail Daughter
Board connection interfaces
PIC18 USB-to-UART serial bridge/converter with
a command shell for IO control
Status LEDs and utility button
BOARD CONFIGURATION
The jumper JP1 on the board can be used to select
between PICtail mode or USB-to-UART bridge mode.
When JP1 is shorted, the board operates in PICtail
mode. In this mode, the UART, control signals, and
digital inputs/outputs can be accessed over the stan-
dard PICtail Plus or PICtail connection interfaces to be
driven by a PIC MCU. The USB-to-UART serial bridge
over J5 is turned off.
When JP1 is open, the board operates in USB-to-
UART bridge mode. In this mode, the PIC18 USB-to-
UART serial bridge over J5 is turned on, and the PICtail
interface should not be used.
FIGURE 1: Microchip RN4020 Certified Bluetooth
Low Energy (BTLE) Module
GETTING STARTED
The RN4020 module on the RN4020 PICtail Plus
Daughter Board exposes a high speed UART interface
which can be used to issue ASCII commands to config-
ure and control the RN4020 module. For more informa-
tion on the RN4020 commands, configuration and
examples, refer to the user’s guide for the RN4020
module.
While in PICtail mode, the board can be plugged into
any standard Microchip development board that
supports the PICtail Plus, or PICtail, connection
interface.
The firmware running on the Microchip 8/16/32-bit PIC
MCU can be used to interface over UART and IO ports
with the RN4020 on the PICtail board. Refer to the
Other Information section for information about
downloading PIC workspaces for PICtail mode.
Note: Ensure that the USB mini-B cable is
detached when operating in PICtail mode.
Note: Ensure that the PICtail connector pin-out on
the host MCU development platform sup-
ports the pin-out on the PICtail interface on
the RN4020 PICtail Plus Daughter Board.
RN4020 PICtail™/PICtail Plus Board Users Guide
Revision A June 2014
RN4020 PICTAIL PLUS DAUGHTER BOARD
DS50002265A-page 2 2014 Microchip Technology Inc.
While in USB-to-UART Bridge mode, the board can be
plugged into a PC that supports serial COM ports.
When plugged in over USB mini-B receptacle J5 to a
PC, the board enumerates as a serial COM port. A ter-
minal emulator application on the PC can be used to
open the COM port and issue commands when the
RN4020 is in Command mode, or to transfer data when
it is in Microchip Low Power Data Profile (MLDP) mode.
The USB-to-UART Bridge mode enables a simple com-
mand shell running on the USB-to-UART Bridge that is
used to control the GPIOs on RN4020 through the
PIC18. Typing $$$ with a carriage return on the termi-
nal emulator will enter the PIC18 command shell, as
seen in Figure 2.
Typing $$$ with a carriage return a second time on the
terminal emulator will exit the PIC18 command shell.
There is a 1 second guard band duration for both entry
into and exit out of the command shell. Command shell
is entered or exited only if there is no data transfer
during the duration of the guard band.
FIGURE 2: PIC18 Command Shell
The supported commands are listed in Table 1. The
supported commands can be issued with carriage
return after entering the PIC18 command shell, as in
the example that is shown below.
OTHER INFORMATION
To obtain the most recent and complete RN4020 data
sheet, user’s guide, and code examples, visit the
Microchip web site: www.microchip.com/rn4020
REVISION HISTORY
Revision A (June 2014)
This is the initial release of this document.
EXAMPLE 1:
I#A,04 // Sets the PIC18 IO port RA2 to logic HIGH
I@C,02 // Sets the direction of PIC18 IO port RC1 to input
I%B // Reads the logic levels on PIC18 IO port RB
TABLE 1: BASIC COMMANDS SUPPORTED IN THE PIC18 COMMAND SHELL
Basic Commands Supported Description
I#X,YY Sets or Clears the IO port A/B/C on PIC18
I@X,YY Sets the direction of the IO port A/B/C on PIC18
I%X Reads the IO port A/B/C on PIC18
HProvides help on supported commands and may show additional
commands, if available
VVersion of the command shell
Legend: X – A or B or C; YY – Hex byte value
20 PICTAIL PLUS DAUGHTER BOARD nu mm m at um Us zmv >0 mm m J 4mm m um as nu mm m © 2014 Microchip Technology Inc‘ DSSDDDZZGSA-page
2014 Microchip Technology Inc. DS50002265A-page 3
RN4020 PICTAIL PLUS DAUGHTER BOARD
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RN4020 PICTAIL PLUS DAUGHTER BOARD
DS50002265A-page 4 2014 Microchip Technology Inc.
NOTES:
YSTEM
2014 Microchip Technology Inc. DS50002265A-page 5
Information contained in this publication regarding device
applications and the like is provided only for your convenience
and may be superseded by updates. It is your responsibility to
ensure that your application meets with your specifications.
MICROCHIP MAKES NO REPRESENTATIONS OR
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OTHERWISE, RELATED TO THE INFORMATION,
INCLUDING BUT NOT LIMITED TO ITS CONDITION,
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Trademarks
The Microchip name and logo, the Microchip logo, dsPIC,
FlashFlex, KEELOQ, KEELOQ logo, MPLAB, PIC, PICmicro,
PICSTART, PIC32 logo, rfPIC, SST, SST Logo, SuperFlash
and UNI/O are registered trademarks of Microchip Technology
Incorporated in the U.S.A. and other countries.
FilterLab, Hampshire, HI-TECH C, Linear Active Thermistor,
MTP, SEEVAL and The Embedded Control Solutions
Company are registered trademarks of Microchip Technology
Incorporated in the U.S.A.
Silicon Storage Technology is a registered trademark of
Microchip Technology Inc. in other countries.
Analog-for-the-Digital Age, Application Maestro, BodyCom,
chipKIT, chipKIT logo, CodeGuard, dsPICDEM,
dsPICDEM.net, dsPICworks, dsSPEAK, ECAN,
ECONOMONITOR, FanSense, HI-TIDE, In-Circuit Serial
Programming, ICSP, Mindi, MiWi, MPASM, MPF, MPLAB
Certified logo, MPLIB, MPLINK, mTouch, Omniscient Code
Generation, PICC, PICC-18, PICDEM, PICDEM.net, PICkit,
PICtail, REAL ICE, rfLAB, Select Mode, SQI, Serial Quad I/O,
Total Endurance, TSHARC, UniWinDriver, WiperLock, ZENA
and Z-Scale are trademarks of Microchip Technology
Incorporated in the U.S.A. and other countries.
SQTP is a service mark of Microchip Technology Incorporated
in the U.S.A.
GestIC and ULPP are registered trademarks of Microchip
Technology Germany II GmbH & Co. KG, a subsidiary of
Microchip Technology Inc., in other countries.
All other trademarks mentioned herein are property of their
respective companies.
© 2014, Microchip Technology Incorporated, Printed in the
U.S.A., All Rights Reserved.
Printed on recycled paper.
ISBN: 978-1-63276-253-5
Note the following details of the code protection feature on Microchip devices:
Microchip products meet the specification contained in their particular Microchip Data Sheet.
Microchip believes that its family of products is one of the most secure families of its kind on the market today, when used in the
intended manner and under normal conditions.
There are dishonest and possibly illegal methods used to breach the code protection feature. All of these methods, to our
knowledge, require using the Microchip products in a manner outside the operating specifications contained in Microchip’s Data
Sheets. Most likely, the person doing so is engaged in theft of intellectual property.
Microchip is willing to work with the customer who is concerned about the integrity of their code.
Neither Microchip nor any other semiconductor manufacturer can guarantee the security of their code. Code protection does not
mean that we are guaranteeing the product as “unbreakable.
Code protection is constantly evolving. We at Microchip are committed to continuously improving the code protection features of our
products. Attempts to break Microchip’s code protection feature may be a violation of the Digital Millennium Copyright Act. If such acts
allow unauthorized access to your software or other copyrighted work, you may have a right to sue for relief under that Act.
Microchip received ISO/TS-16949:2009 certification for its worldwide
headquarters, design and wafer fabrication facilities in Chandler and
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and India. The Company’s quality system processes and procedures
are for its PIC® MCUs and dsPIC® DSCs, KEELOQ® code hopping
devices, Serial EEPROMs, microperipherals, nonvolatile memory and
analog products. In addition, Microchip’s quality system for the design
and manufacture of development systems is ISO 9001:2000 certified.
QUALITY MANAGEMENT S
YSTEM
CERTIFIED BY DNV
== ISO/TS 16949 ==
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DS50002265A-page 6 2014 Microchip Technology Inc.
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03/25/14

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