RN2903 LoRa™ Technology
PICtail™/PICtail Plus
Daughter Board
User’s Guide
2015 Microchip Technology Inc.
DS50002424A
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.
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and may be superseded by updates.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
WARRANTIES OF ANY KIND WHETHER EXPRESS OR
IMPLIED, WRITTEN OR ORAL, STATUTORY OR
OTHERWISE, RELATED TO THE INFORMATION,
INCLUDING BUT NOT LIMITED TO ITS CONDITION,
QUALITY, PERFORMANCE, MERCHANTABILITY OR
FITNESS FOR PURPOSE. Microchip disclaims all liability
arising from this information and its use. Use of Microchip
devices in life support and/or safety applications is entirely at
the buyer’s risk, and the buyer agrees to defend, indemnify and
hold harmless Microchip from any and all damages, claims,
suits, or expenses resulting from such use. No licenses are
conveyed, implicitly or otherwise, under any Microchip
intellectual property rights unless otherwise stated.
Trademarks
The Microchip name and logo, the Microchip logo, dsPIC,
FlashFlex, flexPWR, JukeBlox, KEELOQ, KEELOQ logo, Kleer,
LANCheck, MediaLB, MOST, MOST logo, MPLAB,
OptoLyzer, PIC, PICSTART, PIC32 logo, RightTouch, SpyNIC,
SST, SST Logo, SuperFlash and UNI/O are registered
trademarks of Microchip Technology Incorporated in the
U.S.A. and other countries.
The Embedded Control Solutions Company and mTouch are
registered trademarks of Microchip Technology Incorporated
in the U.S.A.
Analog-for-the-Digital Age, BodyCom, chipKIT, chipKIT logo,
CodeGuard, dsPICDEM, dsPICDEM.net, ECAN, In-Circuit
Serial Programming, ICSP, Inter-Chip Connectivity, KleerNet,
KleerNet logo, MiWi, motorBench, MPASM, MPF, MPLAB
Certified logo, MPLIB, MPLINK, MultiTRAK, NetDetach,
Omniscient Code Generation, PICDEM, PICDEM.net, PICkit,
PICtail, RightTouch logo, REAL ICE, SQI, Serial Quad I/O,
Total Endurance, TSHARC, USBCheck, VariSense,
ViewSpan, WiperLock, Wireless DNA, and ZENA 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.
Silicon Storage Technology is a registered trademark of
Microchip Technology Inc. in other countries.
GestIC is a registered trademark 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.
© 2015, Microchip Technology Incorporated, Printed in the
U.S.A., All Rights Reserved.
ISBN: 978-1-63277-885-7
QUALITYMANAGEMENTSYSTEM
CERTIFIEDBYDNV
== ISO/TS16949==
DS50002424A-page 2
Microchip received ISO/TS-16949:2009 certification for its worldwide
headquarters, design and wafer fabrication facilities in Chandler and
Tempe, Arizona; Gresham, Oregon and design centers in California
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.
2015 Microchip Technology Inc.
Object of Declaration: RN2903 LoRa™ Technology PICtail™/PICtail Plus Daughter Board
2015 Microchip Technology Inc.
DS50002424A-page 3
RN2483 LoRa™ Technology PICtail™/PICtail Plus Daughter Board User’s Guide
NOTES:
DS50002424A-page 4
2015 Microchip Technology Inc.
RN2903 LoRa™ TECHNOLOGY
PICtail™/PICtail PLUS DAUGHTER
BOARD USER’S GUIDE
Table of Contents
Preface ........................................................................................................................... 7
Chapter 1. Overview
1.1 Introduction ................................................................................................... 11
1.2 Features ....................................................................................................... 11
1.3 Contents ....................................................................................................... 13
1.4 Board Configuration ..................................................................................... 13
Chapter 2. Getting Started
2.1 Introduction ................................................................................................... 15
2.2 Communication Modes ................................................................................. 15
2.3 Communication to the Module ...................................................................... 16
2.4 Hardware Description ................................................................................... 16
Appendix A. Board Schematic and PCB Details
A.1 Introduction .................................................................................................. 19
A.2 Board Schematic .......................................................................................... 19
A.3 PCB Layout .................................................................................................. 21
A.4 Bill of Materials ............................................................................................. 24
Worldwide Sales and Service .................................................................................... 25
2015 Microchip Technology Inc.
DS50002424A-page 5
RN2903 LoRa™ Technology PICtail™/PICtail Plus Daughter Board User’s Guide
NOTES:
DS50002424A-page 6
2015 Microchip Technology Inc.
RN2903 LoRa™ TECHNOLOGY
PICtail™/PICtail PLUS DAUGHTER
BOARD USER’S GUIDE
Preface
NOTICE TO CUSTOMERS
All documentation becomes dated, and this manual is no exception. Microchip tools and
documentation are constantly evolving to meet customer needs, so some actual dialogs
and/or tool descriptions may differ from those in this document. Please refer to our web site
(www.microchip.com) to obtain the latest documentation available.
Documents are identified with a “DS” number. This number is located on the bottom of each
page, in front of the page number. The numbering convention for the DS number is
“DSXXXXXXXXA”, where “XXXXXXXX” is the document number and “A” is the revision level
of the document.
For the most up-to-date information on development tools, see the MPLAB® IDE online help.
Select the Help menu, and then Topics to open a list of available online help files.
INTRODUCTION
This chapter contains general information that will be useful to know before using the
RN2903 LoRa™ Technology PICtail™/PICtail Plus Daughter Board. Items discussed
in this chapter include:
•
•
•
•
•
•
•
Document Layout
Conventions Used in this Guide
Recommended Reading
The Microchip Web Site
Development Systems Customer Change Notification Service
Customer Support
Document Revision History
DOCUMENT LAYOUT
This document describes how to use the RN2903 LoRa Technology PICtail/PICtail Plus
Daughter Board as a development tool to emulate and debug firmware on a target
board, as well as how to program devices.
The document is organized as follows:
• Chapter 1. “Overview” – This chapter describes the RN2903 LoRa Technology
PICtail/PICtail Plus Daughter Board and presents various board configurations.
• Chapter 2. “Getting Started” – This chapter describes the two main communication modes and the hardware requirements for getting started with RN2903 LoRa
Technology PICtail/PICtail Plus Daughter Board.
• Appendix A. “Board Schematic and PCB Details” – This appendix provides
the RN2903 LoRa Technology PICtail/PICtail Plus Daughter Board‘s schematic,
PCB layouts, and Bill of Materials (BOM).
2015 Microchip Technology Inc.
DS50002424A-page 7
RN2903 LoRa™ Technology PICtail™/PICtail Plus Daughter Board User’s Guide
CONVENTIONS USED IN THIS GUIDE
This manual uses the following documentation conventions:
DOCUMENTATION CONVENTIONS
Description
Arial font:
Italic characters
Represents
Referenced books
Emphasized text
A window
A dialog
A menu selection
A field name in a window or
dialog
A menu path
MPLAB® IDE User’s Guide
...is the only compiler...
the Output window
the Settings dialog
select Enable Programmer
“Save project before build”
A dialog button
A tab
A number in verilog format,
where N is the total number of
digits, R is the radix and n is a
digit.
A key on the keyboard
Click OK
Click the Power tab
4‘b0010, 2‘hF1
Italic Courier New
Sample source code
Filenames
File paths
Keywords
Command-line options
Bit values
Constants
A variable argument
Square brackets [ ]
Optional arguments
Curly brackets and pipe
character: { | }
Ellipses...
Choice of mutually exclusive
arguments; an OR selection
Replaces repeated text
#define START
autoexec.bat
c:\mcc18\h
_asm, _endasm, static
-Opa+, -Opa0, 1
0xFF, ‘A’
file.o, where file can be
any valid filename
mcc18 [options] file
[options]
errorlevel {0|1}
Initial caps
Quotes
Underlined, italic text with
right angle bracket
Bold characters
N‘Rnnnn
Text in angle brackets < >
Courier New font:
Plain Courier New
Represents code supplied by
user
DS50002424A-page 8
Examples
File>Save
Press <Enter>, <F1>
var_name [,
var_name...]
void main (void)
{ ...
}
2015 Microchip Technology Inc.
Preface
RECOMMENDED READING
This user's guide describes how to use RN2903 LoRa Technology PICtail/PICtail Plus
Daughter Board. Other useful documents are listed below. The following Microchip
documents are available and recommended as supplemental reference resources:
RN2903 Low-Power Long Range LoRa™ Technology Transceiver Module Data
Sheet (DS50002390)
This data sheet provides detailed specifications for the RN2903 module.
RN2903 LoRa™ Technology Module Command Reference User’s Guide
(DS40001811)
This command reference user’s guide describes how to configure the RN2903 module
and includes a description of communication and command references.
THE MICROCHIP WEB SITE
Microchip provides online support via our web site at www.microchip.com. This web
site is used as a means to make files and information easily available to customers.
Accessible by using your favorite Internet browser, the web site contains the following
information:
• Product Support – Data sheets and errata, application notes and sample
programs, design resources, user’s guides and hardware support documents,
latest software releases and archived software
• General Technical Support – Frequently Asked Questions (FAQs), technical
support requests, online discussion groups, Microchip consultant program
member listing
• Business of Microchip – Product selector and ordering guides, latest Microchip
press releases, listing of seminars and events, listings of Microchip sales offices,
distributors and factory representatives
DEVELOPMENT SYSTEMS CUSTOMER CHANGE NOTIFICATION SERVICE
Microchip’s customer notification service helps keep customers current on Microchip
products. Subscribers will receive e-mail notification whenever there are changes,
updates, revisions or errata related to a specified product family or development tool of
interest.
To register, access the Microchip web site at www.microchip.com, click on Customer
Change Notification and follow the registration instructions.
The Development Systems product group categories are:
• Compilers – The latest information on Microchip C compilers and other language
tools
• Emulators – The latest information on the Microchip MPLAB® REAL ICE™
in-circuit emulator
• In-Circuit Debuggers – The latest information on the Microchip in-circuit
debuggers. This includes MPLAB ICD 3 in-circuit debuggers and PICkit™ 3
debug express
• MPLAB X IDE – The latest information on Microchip MPLAB X IDE, the
Windows® Integrated Development Environment for development systems tools
• Programmers – The latest information on Microchip programmers including the
PICkit™ 3 development programmer
2015 Microchip Technology Inc.
DS50002424A-page 9
RN2903 LoRa™ Technology PICtail™/PICtail Plus Daughter Board User’s Guide
CUSTOMER SUPPORT
Users of Microchip products can receive assistance through several channels:
•
•
•
•
Distributor or Representative
Local Sales Office
Field Application Engineer (FAE)
Technical Support
Customers should contact their distributor, representative or field application engineer
(FAE) for support. Local sales offices are also available to help customers. A listing of
sales offices and locations is included in the back of this document.
Technical support is available through the web site at:
http://www.microchip.com/support.
DOCUMENT REVISION HISTORY
Revision A (October 2015)
This is the initial release of this document.
DS50002424A-page 10
2015 Microchip Technology Inc.
RN2903 LoRa™ TECHNOLOGY
PICtail™/PICtail PLUS DAUGHTER
BOARD USER’S GUIDE
Chapter 1. Overview
1.1
INTRODUCTION
The RN2903 LoRa™ Technology PICtail™/PICtail Plus Daughter Board is a
demonstration board that showcases the Microchip RN2903 Low-Power Long Range,
LoRa™ Technology Transceiver Module.
The RN2903 LoRa Technology PICtail/PICtail Plus Daughter Board provides access to
the RN2903 UART and General Purpose Input and Output (GPIO) ports.
This chapter includes the following topics:
• Features
• Contents
• Board Configuration
1.2
FEATURES
The RN2903 LoRa Technology PICtail/PICtail Plus Daughter Board has the following
features as represented in Figure 1-1:
1. Microchip RN2903 Low-Power Long Range, LoRa™ Technology Transceiver
Module
2. SMA connector for 915 MHz band
3. Solder pads around the module for GPIOs, power pins, and communication
signals
4. Supply current measurement points
5. On-board LDO
6. UART traffic LEDs
7. ICSP header to program the on-board PIC18 MCU
8. USB connector
9. PICtail connection interface
10. PICtail Plus connection interface
11. PIC18 MCU for custom functions
2015 Microchip Technology Inc.
DS50002424A-page 11
RN2903 LoRa™ Technology PICtail™/PICtail Plus Daughter Board User’s Guide
FIGURE 1-1:
RN2903 LoRa™ TECHNOLOGY PICtail™/PICtail PLUS
DAUGHTER BOARD
1
1
1
The high-speed UART interface and the GPIO ports are available on the module to
configure, control, and transfer data. The RN2903 LoRa Technology PICtail/PICtail
Plus Daughter Board has PICtail and PICtail Plus connectors to interface with a PIC®
Microcontroller (MCU) on the development boards that support PICtail or PICtail Plus
interface with the required pin mapping. The PICtail board also has an on-board PIC18
MCU preprogrammed to provide a simple USB-to-UART serial bridge, enabling easy
serial connection. This MCU is available for custom user functions by reprogramming.
The demonstration of the RN2903 is performed by plugging the daughter board into a
USB port of a PC. The USB port powers the daughter board and enables the user to
communicate using the RN2903’s ASCII commands.
The development of the RN2903 with Microchip’s PIC MCU line is either possible by
plugging the 28-pin PICtail connector into a PIC18 Explorer, or by plugging into the
30-pin card edge PICtail Plus connector to an Explorer 16.
DS50002424A-page 12
2015 Microchip Technology Inc.
Overview
1.3
CONTENTS
The package kit contents contain the following tools as listed in Table 1-1.
TABLE 1-1:
RN2903 LoRa™ TECHNOLOGY PICtail™/PICtail PLUS
DAUGHTER BOARD
Description
RN2903 LoRa™ Technology PICtail™/PICtail Plus
Daughter Board
1.4
Part Number
RN-2903-PICtail
USB Cable
—
915 MHz antenna
—
BOARD CONFIGURATION
Prior to plugging the module into the motherboard's socket, ensure that one of the
current measure jumpers, CUR1 or CUR2, are shunted.
PICtail Daughter Board can be powered from two sources, either from one of the
PICtail headers or from USB. Both power sources can be active at the same time.
RF antenna must be connected to the SMA connector before attaching power supply
to the board.
Ensure that the applied power supply voltage does not exceed board limits. Figure 1-2,
Figure 1-3, and Figure 1-4 show the connections to various development boards.
FIGURE 1-2:
2015 Microchip Technology Inc.
RN2903 LoRa™ TECHNOLOGY PICtail™/PICtail PLUS
DAUGHTER BOARD CONNECTED TO EXPLORER 16
DEVELOPMENT BOARD
DS50002424A-page 13
RN2903 LoRa™ Technology PICtail™/PICtail Plus Daughter Board User’s Guide
DS50002424A-page 14
FIGURE 1-3:
RN2903 LoRa™ TECHNOLOGY PICtail™/PICtail PLUS
DAUGHTER BOARD CONNECTED TO PIC18 WIRELESS
DEVELOPMENT BOARD
FIGURE 1-4:
RN2903 LoRa™ TECHNOLOGY PICtail™/PICtail PLUS
DAUGHTER BOARD CONNECTED TO PICDEM™ PIC18
EXPLORER DEMONSTRATION BOARD
2015 Microchip Technology Inc.
RN2903 LoRa™ TECHNOLOGY
PICtail™/PICtail PLUS DAUGHTER
BOARD USER’S GUIDE
Chapter 2. Getting Started
2.1
INTRODUCTION
This chapter describes the hardware requirements for RN2903 LoRa Technology
PICtail/PICtail Plus Daughter Board.
The module accepts commands via UART interface. The UART interface can be routed
either to the onboard USB port or one of the PICtail or PICtail Plus connector. Basically,
two communication modes are supported by the daughter board, USB mode and
PICtail mode.
PICtail mode gives more computing power to the user program, since motherboards
contain additional MCUs.
This chapter includes the following topics:
• Communication Modes
• Communication to the Module
• Hardware Description
2.2
COMMUNICATION MODES
2.2.1
USB mode
The USB mode is initiated when the daughter board is connected to a USB port via a
mini-USB cable. In this mode, the on-board PIC18 MCU provides a USB-to-UART
bridge.
Supply voltage is provided via USB and the on-board LDO (IC1) which regulates 5V to
the nominal 3.3V.
2.2.2
PICtail mode
The PICtail mode is initiated when no USB cable is attached to the board, and the
board is plugged into the appropriate motherboard.
Note:
The user must ensure that the PICtail/PICtail Plus port pins are fully
compatible with the pinout of the daughter board.
When the daughter board is not powered from the USB, the on-board PIC18 MCU does
not influence UART communication.
Note:
2.2.3
Some motherboards may adjust the supply voltage to the attached MCU
Plug-in Module. Do not exceed the supply voltage limits of the module.
USB mode while the board is powered from the PICtail
The daughter board can be used in a third mode when it is connected to a PICtail
motherboard while the USB is also connected. It is useful when the user wants to set
the supply voltage from the PICtail connector while the communication must be
continuously active via the USB interface. The on-board PIC18 MCU takes over the
2015 Microchip Technology Inc.
DS50002424A-page 15
RN2903 LoRa™ Technology PICtail™/PICtail Plus Daughter Board User’s Guide
control of the UART interface. In this case, the motherboard is unable to send UART
messages to the module. However, the messages sent by the module are seen on the
PICtail UART’s Module_TX line.
In instances wherein the motherboard does not have power supply, it can be powered
from the USB together with the daughter board. The user must take care of the
maximum output current of the on-board LDO, which is 500 mA.
A short on the jumper JP_RST on the daughter board forces the board to operate in
PICtail mode, although the USB remains connected. The jumper JP_RST keeps the
on-board PIC18 MCU in Reset state to ensure that USB-to-UART protocol translation
is not performed in this mode. If the jumper JP_RST is not shorted, the on-board PIC18
MCU has the priority over the UART communication. This function is only available with
the 30-pin PICtail Plus connection, not for the 28-pin PICtail platform.
2.3
COMMUNICATION TO THE MODULE
In PICtail mode, the Microchip 8/16/32-bit PIC MCUs on the motherboards can run
custom functions and connect to the module using the UART interface, which accepts
ASCII commands from the host.
In USB mode, when the daughter board is connected to the host via USB, the on-board
PIC18 MCU uses the CDC class to create a USB-to-UART bridge device. The host can
run a simple terminal emulator application to issue commands.
2.4
HARDWARE DESCRIPTION
The RF signal path is connected to the SMA edge connector.The current consumption
measurement of the module is supported by the on-board current measure jumpers. If
jumper CUR1 is shunted, the supply current flows directly to the module.
There are two ways to measure current consumption:
1. A current meter can be connected to CUR1 jumper pins to measure the actual
current consumption of the module. CUR2 must be left open.
2. The current consumption graph can be recorded in the time domain by removing
the shunt from CUR1 jumper and shunting CUR2 at the same time. Use a
two-channel oscilloscope, which supports subtracting mathematical function.
Connect oscilloscope probes to CUR1 jumper pins while CUR2 jumper is
shunted. Set the oscilloscope to display the difference between the two channels.
All pins of the module can be accessed via through hole pads which are classified into
two groups located on both sides of the module. The user can mount two 1.27 mm
pitched socket headers if required. Sockets can connect the module pins to a custom
board, whereas the daughter board provides the power. Both through hole pad groups,
J1 and J2, have dedicated pads on which power is delivered to the custom board. The
supply current is measured together with the module's supply current. To do this, JP2
must be shorted for J2 and JP3 shorted for J1.
If the supply current is separated from the module, the two other jumpers must be
shorted. To power the custom board separately, shunt JP1 or JP4.
The on-board PIC18 MCU is programmable via programming port ICSP_IC2. In USB
mode, LD1 and LD2 LEDs indicate communication on the UART.
DS50002424A-page 16
2015 Microchip Technology Inc.
Getting Started
Table 2-1 shows the PICtail/PICtail Plus connections to various boards.
TABLE 2-1:
PICtail AND PICtail PLUS CONNECTIONS
Signal Name
Description
Pin number on PICtail
connector
Pin number on PICtail
Plus connector
+3V3
Positive Supply Rail
26
21, 22
GND
Ground Supply Rail
28
9, 10, 16
Module_TX
UART transmit output of the module
21
2
Module_RX
UART receive input of the module
17
4
Module_RTS
UART Hardware handshake output of
the module(1)
4
19
Module_CTS
UART Hardware handshake input of the
module(1)
3
20
PT_Module_RESET
Master Clear input of the module
1
6
PT+_SENSE
Sensing signal for PICtail Plus connector
(The platform connects this line to GND
when plugged.)
—
15
Note 1:
Optional handshake lines are supported in future firmware releases.
2015 Microchip Technology Inc.
DS50002424A-page 17
RN2903 LoRa™ Technology PICtail™/PICtail Plus Daughter Board User’s Guide
NOTES:
DS50002424A-page 18
2015 Microchip Technology Inc.
RN2903 LoRa™ TECHNOLOGY
PICtail™/PICtail PLUS DAUGHTER
BOARD USER’S GUIDE
Appendix A. Board Schematic and PCB Details
A.1
INTRODUCTION
This appendix provides the RN2903 LoRa Technology PICtail/PICtail Plus Daughter
Board schematic, PCB layout, and Bill of Materials (BOM).
• Board Schematic
• PCB Layout
• Bill of Materials
A.2
BOARD SCHEMATIC
Figure A-1 shows the board schematic.
2015 Microchip Technology Inc.
DS50002424A-page 19
RN2903 LoRa™ TECHNOLOGY PICtail™/PICtail PLUS DAUGHTER BOARD SCHEMATIC
GND
CUR1
+3V3_M
+3V3
1
RFH
1
2
3
4
5
6
SMA
R1
CUR2
GND ID D+ D- +5V
GND
5 4X 3 2 1
+3V3
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
+3V3_ext2
GP0
GP1
GP2
GP3
GP4
GP5
GP6
GP7
GP8
GP9
Socket 1.27 mm
GND
NC
TEST0
TEST1
RESET
GND
VDD
GPIO0
GPIO1
GPIO2
GPIO3
GPIO4
GPIO5
GND
NC
GPIO6
GPIO7
GPIO8
GPIO9
GND
JP4
0603 0R
GND
GND
NC
NC
NC
NC
NC
GPIO10
GPIO11
VDD
GND
GPIO12
GPIO13
GND
UART_RX
UART_TX
RESERVED
RESERVED
UART_CTS
UART_RTS
GND
J1
20
19
18
17
16
15
14
13
12
11
10
9
8
7
6
5
4
3
2
1
GP10
GP11
+3V3_ext1
GP12
GP13
Module_RX
Module_TX
Module_CTS
Module_RTS
20
19
18
17
16
15
14
13
12
11
10
9
8
7
6
5
4
3
2
1
C2
1uF
25V
0603
GND
220
1%
0603
Module_CTS
Module_RX
Module_TX
R6
Pgd
EN
1uF
25V
0603
1
C4
1.5k
1%
0603
C5
100nF
25V
0603
10uF
6.3V
0603
R3
C6
10nF
50V
0603
GND
GND
2.7k
1%
0603
GND
GND
USB_DET
GND
USB_DUSB_D+
IC2
PIC18LF25K50-I/ML
13
D+
12
D-
+3V3
C8
11
VUSB
17
Vdd
4.7uF
6.3V
0603
5,16
29
8
9
10
14
15
Vss
EP
ICSP_IC2
RA0/AN0/C12IN0RA1/AN1/C12IN1RA2/AN2/C2IN+/VrefRA3/AN3/C1IN+/VREF+
RA4/C1OUT/SRQ/T0CKI
RA5/AN4/C2OUT/SRNQ/HLVDIN/SS
RA6/OSC2/CLKO
RA7/OSC1/CLKI
RB0/AN12/SRI/FLT0/SDI/SDA/INT0
RB1/AN10/C12IN3-/P1C/SCK/SCL/INT1
RB2/AN8/CTED1/P1B/INT2
RB3/AN9/C12IN2-/CTED2/CCP2/SDO
RC0/SOSCO/T1CKI/T3CKI/T3G/IOCC0 RB4/AN11/P1D/IOCB4
RC1/CCP2/SOSCI/IOCC1
RB5/AN13/T1G/T3CKI/IOCB5
RC2/AN14/CTPLS/CCP1/P1A/IOCC2
RB6/IOCB6/PGC
RC6/AN18/TX/CK/IOCC6
RB7/IOCB7/PGD
RC7/RX/DT/SDO/IOCC7
MCLR/VPP/RE3
27
28
1
2
3
4
7
6
18
19
20
21
22
23
24
25
Pin 2.54 mm
+3V3
GND
R10
220
1%
0603
LD2
R9
Green
220
1%
0603
LD1
R7
Green
100
1%
0603
26
GND
Module_CTS
Module_RTS
R8
Module_TX
PT+_SENSE
4.7k
1%
0603
IC2_MCLR
whileSOXJJHGLQWRWKH3,&WDLO3OXVVRFNHW
0R
JPI
0603
1
3
5
7
9
11
13
15
17
19
21
23
25
27
Module_RTS
PT+_SENSE
GND
R2
C3
5
+3V3
Module_RX
+3V3
Module_RTS
+3V3
PICTail Plus
+5V_USB
,QVHUWDVKRUWLQWKLVMXPSHUWRNHHS,&LQ5HVHWVWDWH
2
4
6
8
10
12
14
16
18
20
22
24
26
28
PT_Module_RX
PT_MCLR
PT_Module_CTS
PT_Module_CTS
+3V3
2
4
6
8
10
12
14
16
18
20
22
24
26
28
30
GND
+5V_D
JP_RST
1
3
5
7
9
11
13
15
17
19
21
23
25
27
29
2015 Microchip Technology Inc.
Module_TX
PT_Module_RX
PT_Module_RESET
220
1%
0603
2
GND
GND
220
1%
0603
Vin
GND
GND
R5
Vout
C1
470nF
25V
0603
Socket 1.27 mm
U1
R4
GND
B0520LW-7-F
RN2903
GND
D1
MCP1825-3302E/DC
+3V3
0603
G
0R
G
JP3
IC2_ICSP_MCLR
+3V3_M
0603
6
5
4
3
2
1
JP2
0603 0R
IC2_ICSP_PGC
IC2_ICSP_PGD
0R
Gnd
+3V3_M
4
JP1
3,6
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
+3V3
27
26
25
24
23
22
21
J2
IC1
GND
GND
NC
GND
RF
GND
GND
GND
Note:
USB
1
1%
0603
GND
Module_RESET
Pin 2.54 mm right angle
Current measure points
50 Ohm
i
+3V3
TEST
PICTail
Pin 2.54 mm right angle (PBC14DBDN)
GND
Shaded components are not populated by default.
RN2903 LoRa™ Technology PICtail™/PICtail Plus Daughter Board User’s Guide
DS50002424A-page 20
FIGURE A-1:
A.3
PCB LAYOUT
RN2903 LoRa Technology PICtail/PICtail Plus Daughter Board is a 2-layer,
FR4, 1.55 mm, plated through hole PCB construction.
Figure A-2 through Figure A-4 illustrate the PCB layers, and Figure A-5 shows
the assembly drawing of LoRa Technology PICtail/PICtail Plus Daughter
Board.
FIGURE A-2:
RN2903 LoRa™ TECHNOLOGY PICtail™/PICtail PLUS DAUGHTER BOARD TOP
SILKSCREEN
2015 Microchip Technology Inc.
DS50002424A-page 21
RN2903 LoRa™ Technology PICtail™/PICtail Plus Daughter Board User’s Guide
FIGURE A-3:
RN2903 LoRa™ TECHNOLOGY PICtail™/PICtail PLUS DAUGHTER BOARD TOP
COPPER
FIGURE A-4:
RN2903 LoRa™ TECHNOLOGY PICtail™/PICtail PLUS DAUGHTER BOARD
BOTTOM COPPER (BOTTOM VIEW)
DS50002424A-page 22
2015 Microchip Technology Inc.
FIGURE A-5:
RN2903 LoRa™ TECHNOLOGY PICtail™/PICtail PLUS DAUGHTER BOARD TOP
ASSEMBLY
2015 Microchip Technology Inc.
DS50002424A-page 23
RN2903 LoRa™ Technology PICtail™/PICtail Plus Daughter Board User’s Guide
A.4
BILL OF MATERIALS
TABLE A-1:
Reference
C1, C3
RN2903 LoRa™ TECHNOLOGY PICtail™/PICtail PLUS DAUGHTER BOARD BILL OF
MATERIALS (BOM)
Value
Description
Vendor
Vendor P/N
1 µF
CAP, 0603, 25V, 10%, X7R
Murata Electronics
North America
GRM188R71E105KA12D
C2
470 nF
CAP, 0603, 25V, 10%, X7R
Murata Electronics
North America
GRM188R71E474KA12D
C4
100 nF
CAP, 0603, 25V, Y5V
Yageo
CC0603ZRY5V8BB104
C5
10 µF
CAP, 0603, 6.3V, 20%, X5R
Murata Electronics
North America
GRM188R60J106ME47D
C6
10 nF
CAP, 0603, 50V, 10%, X7R
Murata Electronics
North America
GRM188R71H103KA01D
C8
4.7 µF
CAP, 0603, 6.3V, 10%, X5R
Murata Electronics
North America
GRM188R60J475KE19D
CUR1,
CUR2
—
CONN Pin 2 2.54 mm_jumper
Harwin, Inc.
M20-9990245
D1
—
DIODE SCHOTTKY 20V 0.5A
SOD123
Diodes, Inc.
B0520LW-7-F
GND
—
CONN Pin 1
Keystone
5012
IC1
—
IC MCP1825-3302E/DC
Microchip
MCP1825-3302E/DC
IC2
—
IC PIC18LF25K50-I/ML
Microchip
PIC18LF25K50-I/ML
JP2, JP4
—
RES 0 OHM 0603 JUMPER 2P
Vishay Dale
CRCW06030000Z0EA
JP-S1
—
JUMPER SHUNT 2POS 2.54
mm LOPRO GOLD
TE Connectivity
382811-8
LD1, LD2
—
LED 565NM GRN DIFF 0603
Lumex
Opto/Components, Inc.
SML-LX0603GW-TR
PICTail
—
CONN Pin 14x2 2.54 mm right
angle (PBC14DBDN)
Sullins Connector
Solutions
PBC14DBDN
R1
1.00
RES 0603 1/10W 1%
Yageo
RC0603FR-071RL
R2
1.50 k
RES 0603 1/10W 1%
Vishay Dale
CRCW06031K50FKEA
R3
2.70 k
RES 0603 1/10W 1%
Vishay Dale
CRCW06032K70FKEA
R4, R5, R6,
R9, R10
220
RES 0603 1/10W 1%
Vishay Dale
CRCW0603220RFKEA
R7
100
RES 0603 1/10W 1%
Vishay Dale
CRCW0603100RFKEA
R8
4.70 k
RES 0603 1/10W 1%
Vishay Dale
CRCW06034K70FKEA
RFH
—
CONN JACK SMA 50 OHM
EDGE MOUNT
Cinch Connectivity
Solutions Johnson
142-0711-821
U1
—
RF module RN2903 LoRa
915 MHz
Microchip
RN2903
USB
—
CONN MINI B USB R/A SMD
Hirose
UX60-MB-5ST
DS50002424A-page 24
2015 Microchip Technology Inc.
Worldwide Sales and Service
AMERICAS
ASIA/PACIFIC
ASIA/PACIFIC
EUROPE
Corporate Office
2355 West Chandler Blvd.
Chandler, AZ 85224-6199
Tel: 480-792-7200
Fax: 480-792-7277
Technical Support:
http://www.microchip.com/
support
Web Address:
www.microchip.com
Asia Pacific Office
Suites 3707-14, 37th Floor
Tower 6, The Gateway
Harbour City, Kowloon
China - Xiamen
Tel: 86-592-2388138
Fax: 86-592-2388130
Austria - Wels
Tel: 43-7242-2244-39
Fax: 43-7242-2244-393
China - Zhuhai
Tel: 86-756-3210040
Fax: 86-756-3210049
Denmark - Copenhagen
Tel: 45-4450-2828
Fax: 45-4485-2829
India - Bangalore
Tel: 91-80-3090-4444
Fax: 91-80-3090-4123
France - Paris
Tel: 33-1-69-53-63-20
Fax: 33-1-69-30-90-79
India - New Delhi
Tel: 91-11-4160-8631
Fax: 91-11-4160-8632
Germany - Dusseldorf
Tel: 49-2129-3766400
Atlanta
Duluth, GA
Tel: 678-957-9614
Fax: 678-957-1455
Hong Kong
Tel: 852-2943-5100
Fax: 852-2401-3431
Australia - Sydney
Tel: 61-2-9868-6733
Fax: 61-2-9868-6755
China - Beijing
Tel: 86-10-8569-7000
Fax: 86-10-8528-2104
Austin, TX
Tel: 512-257-3370
China - Chengdu
Tel: 86-28-8665-5511
Fax: 86-28-8665-7889
Boston
Westborough, MA
Tel: 774-760-0087
Fax: 774-760-0088
China - Chongqing
Tel: 86-23-8980-9588
Fax: 86-23-8980-9500
Chicago
Itasca, IL
Tel: 630-285-0071
Fax: 630-285-0075
Cleveland
Independence, OH
Tel: 216-447-0464
Fax: 216-447-0643
Dallas
Addison, TX
Tel: 972-818-7423
Fax: 972-818-2924
Detroit
Novi, MI
Tel: 248-848-4000
Houston, TX
Tel: 281-894-5983
Indianapolis
Noblesville, IN
Tel: 317-773-8323
Fax: 317-773-5453
Los Angeles
Mission Viejo, CA
Tel: 949-462-9523
Fax: 949-462-9608
New York, NY
Tel: 631-435-6000
San Jose, CA
Tel: 408-735-9110
Canada - Toronto
Tel: 905-673-0699
Fax: 905-673-6509
China - Dongguan
Tel: 86-769-8702-9880
China - Hangzhou
Tel: 86-571-8792-8115
Fax: 86-571-8792-8116
India - Pune
Tel: 91-20-3019-1500
Japan - Osaka
Tel: 81-6-6152-7160
Fax: 81-6-6152-9310
Japan - Tokyo
Tel: 81-3-6880- 3770
Fax: 81-3-6880-3771
Korea - Daegu
Tel: 82-53-744-4301
Fax: 82-53-744-4302
China - Hong Kong SAR
Tel: 852-2943-5100
Fax: 852-2401-3431
Korea - Seoul
Tel: 82-2-554-7200
Fax: 82-2-558-5932 or
82-2-558-5934
China - Nanjing
Tel: 86-25-8473-2460
Fax: 86-25-8473-2470
Malaysia - Kuala Lumpur
Tel: 60-3-6201-9857
Fax: 60-3-6201-9859
China - Qingdao
Tel: 86-532-8502-7355
Fax: 86-532-8502-7205
Malaysia - Penang
Tel: 60-4-227-8870
Fax: 60-4-227-4068
China - Shanghai
Tel: 86-21-5407-5533
Fax: 86-21-5407-5066
Philippines - Manila
Tel: 63-2-634-9065
Fax: 63-2-634-9069
China - Shenyang
Tel: 86-24-2334-2829
Fax: 86-24-2334-2393
Singapore
Tel: 65-6334-8870
Fax: 65-6334-8850
China - Shenzhen
Tel: 86-755-8864-2200
Fax: 86-755-8203-1760
Taiwan - Hsin Chu
Tel: 886-3-5778-366
Fax: 886-3-5770-955
China - Wuhan
Tel: 86-27-5980-5300
Fax: 86-27-5980-5118
Taiwan - Kaohsiung
Tel: 886-7-213-7828
China - Xian
Tel: 86-29-8833-7252
Fax: 86-29-8833-7256
Germany - Karlsruhe
Tel: 49-721-625370
Germany - Munich
Tel: 49-89-627-144-0
Fax: 49-89-627-144-44
Italy - Milan
Tel: 39-0331-742611
Fax: 39-0331-466781
Italy - Venice
Tel: 39-049-7625286
Netherlands - Drunen
Tel: 31-416-690399
Fax: 31-416-690340
Poland - Warsaw
Tel: 48-22-3325737
Spain - Madrid
Tel: 34-91-708-08-90
Fax: 34-91-708-08-91
Sweden - Stockholm
Tel: 46-8-5090-4654
UK - Wokingham
Tel: 44-118-921-5800
Fax: 44-118-921-5820
Taiwan - Taipei
Tel: 886-2-2508-8600
Fax: 886-2-2508-0102
Thailand - Bangkok
Tel: 66-2-694-1351
Fax: 66-2-694-1350
07/14/15
DS50002424A-page 25
2015 Microchip Technology Inc.