Ublox EVK-LEXI-R422 User manual

UBXDOC-686885345-1758 - R02
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EVK-LEXI-R422
LEXI-R422 cellular evaluation kit
User guide
Abstract
This guide explains how to set up the EVK-LEXI-R422 evaluation kit to begin evaluating the u-blox
ultra-small LEXI-R422 modules supporting multi-band LTE-M / NB-IoT / EGPRS cellular radio access
technology for low power wide area solutions.

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Document information
Title
EVK-LEXI-R422
Subtitle
LEXI-R422 cellular evaluation kit
Document type
User guide
Document number
UBXDOC-686885345-1758
Revision and date
R02
06-Oct-2023
Disclosure restriction
C1-Public
This document applies to the following products:
Product name
Type number
EVK-LEXI-R422
EVK-LEXI-R422-01-00
u-blox or third parties may hold intellectual property rights in the products, names, logos and designs included in this
document. Copying, reproduction, modification or disclosure to third parties of this document or any part thereof is only
permitted with the express written permission of u-blox.
The information contained herein is provided “as is” and u-blox assumes no liability for its use. No warranty, either express or
implied, is given, including but not limited to, with respect to the accuracy, correctness, reliability and fitness for a particular
purpose of the information. This document may be revised by u-blox at any time without notice. For the most recent
documents, visit www.u-blox.com.
Copyright © u-blox AG.

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Contents
Document information................................................................................................................................2
Contents ..........................................................................................................................................................3
1Introduction.............................................................................................................................................4
2Board quick start ...................................................................................................................................5
2.1 Board setup .................................................................................................................................................. 5
2.1.1 SIM and antenna ........................................................................................................................5
2.1.2 Power supply ...............................................................................................................................6
2.1.3 Local connectivity ......................................................................................................................7
2.2 Switch on the cellular system...................................................................................................................8
2.3 Switch off the cellular system..................................................................................................................9
3Register to network ........................................................................................................................... 10
3.1 Enabling error result codes .....................................................................................................................10
3.2 PIN code insertion (when required)........................................................................................................10
3.3 Registration on a cellular network.........................................................................................................10
4Setting up cellular packet data connection on Windows...................................................... 11
4.1 Install a new modem from the control panel .......................................................................................11
4.2 Configuring a new connection ................................................................................................................13
5EVK-LEXI-R422 hardware................................................................................................................ 14
5.1 EVK-LEXI-R422 block diagram and basic description ......................................................................14
5.2 Switches, jumpers and buttons .............................................................................................................16
5.3 LEDs.............................................................................................................................................................17
5.4 Connectors .................................................................................................................................................18
5.5 EVK-LEXI-R422 pin out............................................................................................................................19
5.6 Current consumption measurement ....................................................................................................21
Appendix ....................................................................................................................................................... 22
ASetting up AT terminal communication...................................................................................... 22
BGlossary ................................................................................................................................................. 24
CDeclaration of conformities............................................................................................................. 25
Related documentation ........................................................................................................................... 25
Revision history.......................................................................................................................................... 25
Contact.......................................................................................................................................................... 25

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1Introduction
The EVK-LEXI-R422 kit is a powerful and easy-to-use tool that simplifies the evaluation of the u-blox
LEXI-R422 multi-band LTE-M / NB-IoT /EGPRS cellular modules.
☞See the LEXI-R422 data sheet [2] and the LEXI-R422 system integration manual [3] for features
supported by LEXI-R422 modules.
As shown in Figure 1, the EVK-LEXI-R422 evaluation kit is formed by three boards:
•The EVB-WL3 contains the power supply and other peripherals for the cellular module
•The cellular adapter board, ADP-LEXI-R422, contains the LEXI-R422 cellular module and other
connectors
•The GNSS adapter board, ADP-GNSS, contains the u-blox MAX-M10S GNSS module, the GNSS
antenna connector and the USB connector for the GNSS module
EVB-WL3
ADP-LEXI-R422
ADP-GNSS
Figure 1: EVK-LEXI-R422 evaluation kit formed by three boards
☞For more hardware details about the EVK-LEXI-R422 evaluation kit, see section 5.

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2Board quick start
2.1 Board setup
2.1.1 SIM and antenna
J300
SW400
J400
J500
J501
DL401
DL400
J404
DL403
DL501
DL404
DL405
DS501
DS500
DS107
DS105
DS109
DS103
J402
J403
J405J406
J103
DS118
DS121
DS107
DS104
J102
J104 (J101on bot tom side)
J103 ( J100 o n bottom side)
J106
J201
J105
J109
VCC_MOD
DS100
DS201
DS139
LEXI-R422
DS160
SW304
J104
Figure 2: SIM and antenna set up
1. Insert a SIM card into J300, the SIM card holder;
2. Connect the cellular antenna provided with the EVK-LEXI-R422 evaluation kit box to J106, the
cellular antenna SMA connector;
3. If GNSS functionality is required, connect the GNSS antenna provided with the EVK-LEXI-R422
evaluation kit box to J103, the GNSS antenna SMA connector on ADP-GNSS, and keep the cellular
GNSS detach switch SW304 in “GNSS” position;
Place the GNSS antenna in a location with a good view of the sky.

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2.1.2 Power supply
J300
J400
J500
J501
DL401
DL400
DL403
DL501
DL404
DL405
DS501
DS500
DS107
DS105
DS109 DS103
J402
J403
J405J406
J103
DS118
DS121 DS107
DS104
J102
J104 (J101on bot tom side)
J103 ( J100 o n bottom side)
J106
J201
J105
VCC_MOD
DS100
DS201
DS139
LEXI-R422
DS160
SW400
DL401
DL400
J404
J109
J104
Figure 3: Power supply set up
1. Connect the AC / DC +12 V power supply adapter to J400, the 9 –18 V power input connector; LED
DL401 light turns blue;
2. Provide a jumper socket on both J404 and J109, the cellular VCC supply jumpers;
3. Turn SW400, the main power switch, to the “ON” position; LED DL400 light turns green.

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2.1.3 Local connectivity
J300
SW400
J400
J500
J501
DL401
DL400
J404
DL403
DL501
DL404
DL405
DS501
DS500
DS107 DS105
DS109 DS103
J402
J403
J405J406
J103
DS118
DS121 DS107
DS104
J102
J104
J103
J106
J201
J105
J109
VCC_MOD
DS100
DS201
DS139
LEXI-R422
DS160
DL403
DL501
DL405
SW403
SW401
DL404
DS20
1
J248
J104
Figure 4: Local connectivity set up
For communication via the UART interfaces of the cellular module, the following connections are
allowed and can be alternatively enabled in a mutually exclusive way (see Table 1 for switches and
jumper position and LED status):
a. Connect a USB cable to J501 (mini-USB), the cellular USB main UART; the LED DL501 light
turns blue. When a USB cable is connected to this mini-USB connector, two COM ports are
enabled in Windows: the main 8-wire UART interface of the cellular system is available over
the first COM port opened by the driver, after the end of the cellular system boot once the
cellular system is switched on.
b. Connect an RS232 cable to J500, the cellular RS232 main UART, a DB9 connector: the main
8-wire UART interface of the cellular system is available over RS232, after the cellular system
boot once the cellular system is switched on.
c. Connect a USB cable to J201 (mini-USB), the cellular USB two UARTs; the LED DS201 light
turns blue. When a USB cable is connected to this mini-USB connector, two COM ports are
enabled in Windows: the two 4-wire UART interfaces of the cellular system are respectively
available over the two numbered COM ports opened by the driver, after the end of the cellular
system boot once the cellular system is switched on (to enable two UART interfaces, see the
AT commands manual [1], +USIO AT command).

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Type of connections
SW401
SW403
J248
LED
Access to the main UART interface
over J501 (EVB-WL3)
ON BOARD
MINIUSB
Jumper socket on pins 1-2
DL403
DL501
Access to the main UART interface
over J500 (EVB-WL3)
ON BOARD
DB9
Jumper socket on pins 1-2
DL405
Access to the two UART interfaces
over J201 (ADP-LEXI-R422)
B2B
Do not care
Jumper socket on pins 2-3
DL404
DS201
Access to UART interface(s) over
J104 (ADP-LEXI-R422)
B2B
Do not care
No jumper socket
DL404
Table 1: Serial interface configuration
☞See the LEXI-R422 data sheet [2] and the +USIO AT command description in the AT commands
manual [1] for the description and configuration of the USIO variants.
Run an AT terminal application (such as the u-blox m-center tool) selecting the AT port, with these
settings:
Data rate
Data bits
Parity
Stop bits
Flow control
115200 bit/s
8
N
1
HW
See appendix Afor how to configure the u-blox m-center AT terminal for Windows.
2.2 Switch on the cellular system
J300
SW400
J400
J500
J501
DL401
DL400
J404
DL403
DL501
DL404
DL405
DS501
DS500
DS107
DS105
DS109 DS103
J402
J403
J405J406
J103
DS118
DS121 DS107
DS104
J102
J104 (J101on bot tom side)
J103 ( J100 o n bottom side)
J106
J201
J105
J109
VCC_MOD
DS100
DS201
DS139
LEXI-R422
DS160
SW302
J104
Figure 5: Cellular power-ctrl push button
To switch on the cellular system in the EVK-LEXI-R422, press SW302, the cellular power-ctrl button.

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2.3 Switch off the cellular system
To switch off the cellular system in the EVK-LEXI-R422, send the +CPWROFF AT command.
☞Issue AT+CPWROFF command before switching off the main power supply, otherwise settings
and configuration parameters may not be saved in the non-volatile memory of the cellular module.

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3Register to network
3.1 Enabling error result codes
Command sent by DTE (user)
DCE response (module)
Description
AT+CMEE=2
OK
Enable the cellular module to report verbose error
result codes.
3.2 PIN code insertion (when required)
Command sent by DTE (user)
DCE response (module)
Description
AT+CPIN="8180"
OK
Enter the PIN code, if needed (enter the PIN of the SIM
card –8180 is an example).
AT+CLCK="SC",0,"8180"
OK
Unlock the PIN at power-on (the last parameter is the
PIN of the SIM card –8180 is an example).
AT+CLCK="SC",1,"8180"
OK
Lock the PIN at power-on (the last parameter is the PIN
of the SIM card –8180 is an example).
3.3 Registration on a cellular network
Command sent by DTE (user)
DCE response (module)
Description
AT+CREG?
+CREG: 0,1
OK
Verify the CS network registration.
AT+CEREG?
+CEREG:
0,1,"5684","03761b14",7
OK
Verify the EPS network registration.
AT+COPS=0
OK
Register the module on the network.
The cellular module automatically registers itself on
the cellular network. This command is necessary only if
the auto-registration failed (AT+CREG? returns 0,0).
AT+COPS?
+COPS: 0,0,"I TIM",7
OK
Read the operator name and radio access technology
(RAT).
For the complete description and syntax of the AT commands supported by LEXI-R422 modules, see
the AT commands manual [1].

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4Setting up data connection on Windows
This section describes how to set up a cellular packet data connection on Windows 10 using the
operating system’s TCP/IP stack and EVK-LEXI-R422. This is also referred to as a dial-up connection.
4.1 Install a new modem from the control panel
1. From Control Panel, select Phone and
Modem > Modems > Add.
This opens the Add Hardware Wizard.
2. Tick “Don’t detect my modem” checkbox.
Click Next.

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3. Select Standard 33600 bps Modem.
Click Next.
4. Select COM port for data communication
and click Next. The modem will be installed
on this COM port.
5. Click Finish to complete the installation.
6. Now the new modem is visible in Control
Panel, under Phone and Modem > Modems.
Any extra initialization AT command (e.g., to
set a specific APN name) can be entered by
selecting Properties and filling in
Advanced > Extra initialization commands
text box.
Now the module is ready and the connection can be configured.
The modem configuration can also be edited in Device Manager, by clicking on the modem name.

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4.2 Configuring a new connection
1. From Control Panel, select Network and
Sharing Center > Set up a new
connection or network.
2. Click Connect to the Internet and then
Next.
3. Select Dial-up and, if requested, the
modem previously installed.
4. Enter the parameters for the dial-up
connection:
oThe module telephone number:
*99***1#
(change, if using a PDP context
different from 1)
oThe specific account information for
the network operator
oA name for the connection, e.g.,
“EVK-LEXI-R422 dial-up”
The packet data connection is now ready to be used with EVK-LEXI-R422. Click Connect to start the
connection, then start a browser to check internet connectivity.
Consult the cellular network operator for username and password. In most cases, they can be left
empty.

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5EVK-LEXI-R422 hardware
5.1 EVK-LEXI-R422 block diagram and basic description
Figure 6 shows the main interfaces and internal connections of the EVK-LEXI-R422 evaluation kit:
SIM
card holder
(J300)
Power-ctrl
(SW302)
ADP-LEXI-R422
LEXI-R422
module
42-pin DIL B2B connector (J103) 42-pin DIL B2B connector (J104)
EVB-WL3
GNSS
module
ADP-GNSS
RF_IN
USB
UART
converter
Cellular USB
(cellular main UART)
(J501)
Cellular RS232
(cellular main UART)
(J500)
RS232
UART
converter UART
MINIUSB/DB9
switch
(SW403)
ON-BOARD/B2B
switch
(SW401)
USB
I2C
DC/DC
step - down
Main power switch
(SW400)
12 V
(J400)
3.8 V
VCC jumper
(J404)
LDO
GPIO2
GNSS switch
(SW304) Cellular
native
USB
(J105)
Cellular
antenna
(J106)
Cellular USB
(two UARTs)
(J201)
USB/UARTs
converter
VCC jumper
(J109)
3-pin
(J248)
3-pin
Tx
(J104)
GPIO3
Rx
Figure 6: Block diagram of EVK-LEXI-R422
The ADP-LEXI-R422 and the ADP-GNSS are connected by male header board-to-board connectors on
the bottom of the adapter boards and their corresponding female connectors on top of the EVB-WL3.
As also illustrated in section 2.1.3 and summarized in Table 1, for communication via the UART
interfaces of the cellular module, the following connections are allowed and can be alternatively
enabled in a mutually exclusive way:
1. If the ON-BOARD / B2B switch (SW401) on the EVB-WL3 board is set to “ON-BOARD” and if a
jumper socket is inserted on the pin 1 and pin 2 of the 3-pin header J248 on the cellular adapter
board (see Figure 7), then the main UART interface of the LEXI-R422 module, routed through the
DIL header board-to-board connectors mounted on the bottom of the cellular adapter board, can
be accessed as converted to USB interface on the USB connector (J501) on the EVB-WL3 board,
or it can be accessed as converted to RS232 interface on the RS232 DB9 connector (J500) on the
EVB-WL3 board, according to the MINIUSB / DB9 switch (SW403) setting.
2. If the ON-BOARD / B2B switch (SW401) on the EVB-WL3 board is set to “B2B” and if a jumper
socket is inserted on the pin 2 and pin 3 of the 3-pin header J248 on the cellular adapter board
(see Figure 7), the UART interfaces of LEXI-R422 module can be accessed as USB interfaces on
the USB connector (J201) on the cellular adapter board.
3. If the ON-BOARD / B2B switch (SW401) on the EVB-WL3 board is set to “B2B” and if there is no
jumper socket inserted on the 3-pin header J248 on the cellular adapter board (see Figure 7), then
the UART interface(s) of the LEXI-R422 module can be accessed at 1.8 V CMOS signal levels on
the DIL header connector mounted on the top of the cellular adapter board, to communicate, for
example, with an external MCU.

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J248
Pin 1
J248
Pin 3
Figure 7: 3-pin header J248 available to set the routing of the UART interfaces
The USB interface of the cellular module (available for diagnostic purpose only) is available on the
native USB connector (J105) mounted on the cellular adapter board.
Other LEXI-R422 peripherals are available on the dual-in-line male board-to-board connectors
(J103 and J104) provided on the top layer of the cellular adapter board.
The lower board (EVB-WL3) is also designed to be used with other u-blox cellular adapter boards. It
contains additional switches, jumpers, connectors, LEDs and parts that may be only partially
described in this document, because they are intended for use only with other u-blox cellular modules.
It is recommended to leave any additional connector unconnected and any additional switch in its
default configuration.

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5.2 Switches, jumpers and buttons
J300
SW400
J400
J500
J501
DL401
DL400
J404
DL403
DL501
DL404
DL405
DS501
DS500
DS107
DS105
DS109 DS103
J402
J403
J405J406
J103
DS118
DS121
DS107
DS104
J102
J104 ( J101on bot tom side)
J103 (J100 on bot tom side)
J106
J201
J105
J109
VCC_MOD
DS100
DS201
DS139
LEXI-R422
DS160
J104
Cellular power-ctrl - SW302
Cellular GPIO detach - SW300
Cellular UART detach - SW401
Cellular UART routing - SW403
Cellular GNSS detach - SW304
GNSS BCKP - SW204
Main power - SW400
Cellular VCC supply jumper - J404
Cellular VCC supply jumper - J109
Cellular UARTs routing - J248
GNSS Tx routing –J104
Function
Description
Name
Board
Main power switch
Power on / off the whole evaluation kit
SW400
EVB-WL3
Cellular VCC
Jumper socket to provide the 3.8 V supply to the cellular VCC input
J404
EVB-WL3
J109
ADP-LEXI-R422
Cellular power-ctrl
Push button to switch on / off / reset LEXI-R422 modules
SW302
EVB-WL3
Cellular UART detach
Slide switch to attach / detach cellular UART from USB / RS232
connectors
SW401
EVB-WL3
Cellular UART routing
Slide switch to select cellular main UART routing on USB or RS232
connector
SW403
EVB-WL3
Cellular UARTs routing
3-pin header jumper to route cellular UART(s) interfaces to the USB
two UARTs connector on the ADP-LEXI-R422, or over the USB or
RS232 connectors on the EVB-WL3, or over the DIL B2B connector on
the ADP-LEXI-R422
J248
ADP-LEXI-R422
Cellular GPIO detach
Slide switch to attach / detach the cellular GPIOs from peripherals:
when detached, the signals are available only on DIL B2B connector on
ADP-LEXI-R422 board
SW300
EVB-WL3
Cellular GNSS detach
Slide switch to attach / detach the cellular system to the GNSS module
mounted on the ADP-GNSS: when detached, signals are available only
on DIL B2B connector on ADP-LEXI-R422 board
SW304
EVB-WL3
GNSS BCKP
Slide switch to connect / disconnect backup battery to V_BCKP pin of
the GNSS module mounted on the ADP-GNSS
SW204
EVB-WL3
GNSS Tx routing
3-pin header jumper to route and make accessible GNSS UART Tx over
the USB connector on the ADP-GNSS or to use it as Tx data ready for
the cellular module
J104
ADP-GNSS
Table 2: EVK-LEXI-R422 switches, jumpers and buttons description

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5.3 LEDs
J300
SW400
J400
J500
J501
DL401
DL400
J404
DL403
DL501
DL404
DL405
DS501
DS500
DS107 DS105
DS109 DS103
J402
J403
J405J406
J103
DS118
DS121
DS107
DS104
J102
J104 (J10 1on botto m side)
J103 (J10 0 on bo ttom side)
J106
J201
J105
J109
VCC_MOD
DS100
DS201
DS139
LEXI-R422
DS160
J104
Cellular native USB - DS100
Cellular two UARTs USB –DS201
Cellular USB (UART) - DL403
Cellular UART USB - DL501
Cellular UART detach - DL404
Cellular RS232 (UART) - DL405
Cellular RI indicator - DS501
Cellular CTS indicator - DS500
Cellular GPIO4 indicator - DS103
Cellular GPIO3 indicator - DS109
Cellular GPIO2 indicator - DS105
Cellular GPIO1indicator - DS107
Cellular RFCTRL1indicator - DS139
Main power - DL401
Cellular VCC - DL400
GNSS USB - DS104
GNSS time pulse - DS121
Cellular / GNSS I2C - DS107
Cellular RFCTRL2 indicator - DS160
GNSS VCC supply - DS118
Function
Color
Description
LED #
Board
Main power
Power supply plugged in the 9 - 18 V power input
DL401
EVB-WL3
Cellular VCC
Cellular module supplied; main power switch must be switched on
DL400
EVB-WL3
Cellular UART USB
USB cable plugged in J501 for UART access
DL501
EVB-WL3
Cellular USB (UART)
Green light on when UART is routed to J501
Red light blinks at UART TX or RX data on J501
DL403
EVB-WL3
Cellular UART detach
UART signals are available only on ADP-LEXI-R422
DL404
EVB-WL3
Cellular RS232 (UART)
Green light on when UART is routed to J500
Red light blinks at UART TX or RX data on J500
DL405
EVB-WL3
Cellular RI indicator
RI line turns ON (active low)
DS501
EVB-WL3
Cellular CTS indicator
CTS line turns ON (active low)
DS500
EVB-WL3
Cellular GPIO1 indicator
Green light on when cellular GPIO1 is high
DS107
EVB-WL3
Cellular GPIO2 indicator
Green light on when cellular GPIO2 is high
DS105
EVB-WL3
Cellular GPIO3 indicator
Green light on when cellular GPIO3 is high
DS109
EVB-WL3
Cellular GPIO4 indicator
Green light on when cellular GPIO4 is high
DS103
EVB-WL3
Cellular RFCTRL1 indicator
Green light on when cellular RFCTRL1 is high
DS139
ADP-LEXI-R422
Cellular RFCTRL2 indicator
Red light on when cellular RFCTRL2 is high
DS160
ADP-LEXI-R422
Cellular native USB
USB cable plugged in J105 on ADP-LEXI-R422
DS100
ADP-LEXI-R422
Cellular two UARTs USB
USB cable plugged in J201 on ADP-LEXI-R422
DS201
ADP-LEXI-R422
GNSS VCC supply
MAX-M10S GNSS module supply is turned on
DS118
ADP-GNSS
GNSS USB
USB cable plugged in J102 on ADP-GNSS
DS104
ADP-GNSS
GNSS time pulse
MAX-M10S GNSS time pulse
DS121
ADP-GNSS
Cellular / GNSS I2C
Cellular / GNSS module communication over the I2C interface
DS107
ADP-GNSS
Table 3: EVK-LEXI-R422 LEDs description

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5.4 Connectors
J300
SW400
J400
J500
J501
DL401
DL400
J404
DL403
DL501
DL404
DL405
DS501
DS500
DS107 DS105
DS109 DS103
J402
J403
J405J406
J103
DS118
DS121
DS107
DS104
J102
J104
J103
J106
J201
J105
J109
VCC_MOD
DS100
DS201
DS139
LEXI-R422
DS160
J104
Cellular UART USB - J501
Cellular RS232 (UART) - J500
SIM card holder - J300
12 V power input - J400
Cellular antenna connector - J106
Cellular native USB - J105
Cellular two UARTs USB - J201
DIL B2B connector - J103
DIL B2B connector - J104
GNSS backup battery - BT200
GND - J403
GND - J402
GND - J405GND - J406
GNSS antenna connector - J103
GNSS USB - J102
Function
Description
Name
Board
9 - 18 V power input
Connector for the AC / DC power adapter of EVK
AC: 100-240 V, 0.8 A, 50-60 Hz / DC: +12 V, 2.5 A
IEC 60417-5172
Class II equipment
J400
EVB-WL3
SIM card holder
SIM card holder (mini-SIM 2FF)
J300
EVB-WL3
Cellular USB (UART)
Mini-USB connector for the cellular UART interface converted as
USB interface
J501
EVB-WL3
Cellular RS232 (UART)
DB9 connector for the cellular UART interface converted as
RS232 interface
J500
EVB-WL3
GNSS backup battery
Backup battery socket for the GNSS module (under ADP-GNSS board)
BT200
EVB-WL3
GND
Ground terminals for the probe reference
J402, J403
J405, J406
EVB-WL3
Cellular antenna
SMA connector for the cellular antenna (ANT)
J106
ADP-LEXI-R422
Cellular native USB
Mini-USB connector for the cellular native USB interface
J105
ADP-LEXI-R422
Cellular two UARTs USB
Mini-USB connector for the cellular two UART interfaces converted as
USB interfaces
J201
ADP-LEXI-R422
DIL B2B headers
Dual-in-line board-to-board connectors for cellular module interfaces
J103, J104
ADP-LEXI-R422
GNSS antenna
SMA connector for the GNSS antenna to be connected to the GNSS RF
input of the MAX-M10S GNSS module (RF_IN)
J103
ADP-GNSS
GNSS USB
Mini-USB connector for the GNSS module UART interface converted as
USB interface
J102
ADP-GNSS
Table 4: EVK-LEXI-R422 connectors description
⚠Caution! In the unlikely event of a failure in the internal protection circuitry, there is a risk of an
explosion when charging a fully or a partially discharged battery. Replace the battery when it no
longer has sufficient charge for unit operation. Check the battery before use if the device has not
been used for an extended period.
⚠Caution! Risk of explosion if the battery is replaced with an incorrect type. Dispose battery
according to rules!

EVK-LEXI-R422 - User guide
UBXDOC-686885345-1758 - R02 EVK-LEXI-R422 hardware Page 19 of 25
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5.5 EVK-LEXI-R422 pin out
Table 5 lists the interfaces of the LEXI-R422 modules, as routed up to the 42-pin dual-in-line
board-to-board connectors (J103 and J104) available on the ADP-LEXI-R422 adapter board of the
evaluation kit.
LEXI-R422 module
Connector
LEXI-R422 module
Connector
Pin no.
Pin ID
Signal name
Name / pin number
Pin no.
Pin ID
Signal name
Name / pin number
1
B1
GND
J104 pins 7-10
27
P15
PWR_CTRL
J104 pin 30
2
C1
RSVD
Not available
28
N15
RSVD
J103 pin 25
3
D1
GND
J104 pins 7-10
29
M15
GPIO6
J104 pin 24
4
E1
RXD
J104 pin 15
30
L15
SIM_RST
J103 pin 15
5
F1
TXD
J104 pin 16
31
K15
SIM_CLK
J103 pin 16
6
G1
CTS
J104 pin 13
32
J15
SIM_IO
J103 pin 13
7
H1
RTS
J104 pin 14
33
H15
VSIM
J103 pin 14
8
J1
DCD
J104 pin 12
34
G15
RSVD
Not available
9
K1
DTR
J104 pin 11
35
F15
RSVD
Not available
10
L1
RI
J104 pin 18
36
E15
RSVD
Not available
11
M1
DSR
J104 pin 17
37
D15
RSVD
Not available
12
N1
SCL
J103 pin 19
38
C15
RSVD
Not available
13
P1
SDA
J103 pin 22
39
B15
RSVD
Not available
14
R2
GPIO1
J104 pin 34
40
A14
VCC
J103 pins 7-10
15
R3
GPIO2
J104 pin 32
41
A13
VCC
J103 pins 7-10
16
R4
GPIO3
J104 pin 31
42
A12
VCC
J103 pins 7-10
17
R5
GPIO4
J104 pin 26
43
A11
V_INT
J104 pin 35
18
R6
GPIO5
J104 pin 23
44
A10
RFCTRL2
J103 pin 6
19
R7
USB_3V3
J104 pin 4
45
A9
RFCTRL1
J103 pin 5
20
R8
USB_D-
Not available
46
A8
RSVD
J103 pin 4
21
R9
USB_D+
Not available
47
A7
RSVD
J104 pin 22
22
R10
USB_5V0
Not available
48
A6
RSVD
Not available
23
R11
RSVD
J103 pin 26
49
A5
ANT_DET
Not available
24
R12
RSVD
J103 pin 21
50
A4
GND
J104 pins 7-10
25
R13
RSVD
J103 pin 23
51
A3
ANT
Not available
26
R14
RSVD
J103 pin 24
52
A2
GND
J104 pins 7-10
Table 5: Interfaces of LEXI-R422 modules

EVK-LEXI-R422 - User guide
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Dual-in-line board-to-board connector J104
Dual-in-line board-to-board connector J103
Signal name
Pin no.
Pin no.
Signal name
Signal name
Pin no.
Pin no.
Signal name
Not connected
1
2
GND
Not connected
1
2
GND
Not connected
3
4
USB_3V3
Not connected
3
4
RSVD #46
Not connected
5
6
Not connected
RFCTRL1
5
6
RFCTRL2
GND
7
8
GND
VCC
7
8
VCC
GND
9
10
GND
VCC
9
10
VCC
DTR
11
12
DCD
Not connected
11
12
Not connected
CTS
13
14
RTS
SIM_IO
13
14
VSIM
RXD
15
16
TXD
SIM_RST
15
16
SIM_CLK
DSR
17
18
RI
Not connected
17
18
Not connected
Not connected
19
20
Not connected
SCL
19
20
Not connected
Not connected
21
22
RSVD #47
RSVD #24
21
22
SDA
GPIO5
23
24
GPIO6
RSVD #25
23
24
RSVD #26
Not connected
25
26
GPIO4
RSVD #28
25
26
RSVD #23
Not connected
27
28
Not connected
Not connected
27
28
Not connected
Not connected
29
30
PWR_CTRL
Not connected
29
30
Not connected
GPIO3
31
32
GPIO2
Not connected
31
32
Not connected
RSVD #99
33
34
GPIO1
Not connected
33
34
Not connected
V_INT
35
36
Not connected
Not connected
35
36
Not connected
Not connected
37
38
Not connected
Not connected
37
38
Not connected
Not connected
39
40
Not connected
Not connected
39
40
Not connected
GND
41
42
Not connected
GND
41
42
Not connected
Table 6: Pin-out of the 42-pin dual-in-line board-to-board connectors (J103, J104)
☞The pins / interfaces that are not supported by LEXI-R422 modules should be not driven by an
external device. See the LEXI-R422 data sheet [2] and the LEXI-R422 system integration
manual [3] to learn about the features supported by LEXI-R422 module.