EVK-R4 - User guide

UBX-16029216 - R08

Starting up

Page 8 of 31

C1-Public

1.2 EVK-R4 block diagram

Figure 4 shows the main interfaces and internal connections of the evaluation kit for SARA-R410M

and SARA-R412M modules:

SIM

card holder

(J300)

Reset

(SW303)

Power-on

(SW302)

SARA-R41xM

adapter board

SARA-R41xM

Cellular

module

EVB-WL3

GNSS

module

GNSS adapter board

RF_IN

USB

UART

converter

Cellular USB

(UART)

(J501)

Cellular RS232

(UART)

(J500)

RS232

UART

converter

UART

MiniUSB/DB9

switch

(SW403)

On-Board/B2B

switch

(SW401)

USB

Step - Down

Main power switch

(SW400)

12 V

(J400)

3.8 V

VCC jumper

(J404)

LDO

GPIO2/3/4

GNSS switch

(SW304)

ANT

Native

USB

Figure 4: Block diagram of the evaluation kit for SARA-R410M and SARA-R412M modules

Figure 5 shows the main interfaces and internal connections of the evaluation kit for SARA-R422M8S

modules:

SIM

card holder

(J300)

Power-ctrl

(SW302)

SARA-R422M8S

adapter board

SARA-R422M8S

module

EVB-WL3

GNSS

module

GNSS adapter board

RF_IN

USB

UART

converter

Cellular USB

(Main UART + TXD_GNSS)

(J501)

Cellular RS232

(Main UART)

(J500)

RS232

UART

converter

UART

TXD_GNSS

MiniUSB/DB9

switch

(SW403)

On-board/B2B

switch

(SW401)

USB

I2C

Step - down

Main power switch

(SW400)

12 V

(J400)

3.8 V

VCC jumper

(J404)

LDO

GPIO2/3/4

GNSS switch

(SW304)

Native

USB

(J105)

CEL

ANT

(J106)

Cellular USB

(two UARTs)

(J201)

GNSS

ANT

(J112)

USB/UART

converter

VCC jumper

(J109)

UART

(J248)

TXD_GNSS

Figure 5: Block diagram of the evaluation kit for SARA-R422M8S modules

The EVK-R4 is formed by three boards:

1.

The lower one, called EVB-WL3, contains the power supply and other peripherals for the SARA-R4

series cellular module (SIM card holder, reset button and power-on / power-ctrl button).

2.

The cellular adapter board, called ADP-R4, contains the SARA-R4 cellular module, antenna

DIL header connectors (J300 and J301) making accessible interfaces of the SARA-R4 module.

3.

The GNSS adapter board, called ADP-GNSS, contains the u-blox NEO-M8N GNSS module, the

GNSS antenna connector and the USB connector for the u-blox NEO-M8N GNSS module.