EVK-R5 - User guide

UBX-19042592 - R05

Starting up

Page 5 of 23

C1-Public

1.2 Block diagram

Figure 2 shows the main interfaces and internal connections of the EVK-R5 evaluation kit:

SIM

card holder

(J300)

Reset

(SW303)

Power-on

(SW302)

SARA-R5 adapter board

SARA-R5

cellular

module

EVB-WL3

GNSS

module

GNSS adapter board

RF_IN

USB

UART

converter

Cellular USB

(single UART)

(J501)

Cellular RS232

(single UART)

(J500)

RS232

UART

converter

UART

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)

Figure 2: Block diagram of the EVK-R5 for SARA-R5 modules

The EVK-R5 evaluation kit is formed by three boards:

1.

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

SARA-R5 series cellular module (such as SIM card holder, reset button and power-on button).

2.

The cellular adapter board, called ADP-R5, contains the u-blox SARA-R5 cellular module, antenna

connectors for the two UART interfaces and the USB interface of the SARA-R5 module, and the

DIL header connectors (J300 and J301) making accessible interfaces of the SARA-R5 module.

3.

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

antenna connector and the USB connector for the GNSS module.

The cellular and the GNSS adapter boards are connected by means of male header board-to-board

connectors provided on the bottom of the adapter boards and their corresponding female connectors

provided on top of the lower board, called EVB-WL3.

If the on-board / B2B switch (SW401) is set to “on-board”, then the single UART interface (with the

default USIO variant 0 setting, or the USIO variant 1 setting) is available on DIL connectors on the

cellular adapter board. It is routed up to the RS232 DB9 connector (J500) or the USB connector (J501)

mounted on the EVB-WL3 board according to the settings of the mini-USB / DB9 switch (SW403).

If the on-board / B2B switch (SW401) is set to “B2B”, then the two UART interfaces (with the +USIO

variant 2, 3 or 4 setting) are available on the USB connector (J201) mounted on the cellular adapter

board.

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 SARA-R5 series peripherals are available on the dual-in-line male board-to-board connectors

provided on the top layer of the cellular adapter board (J300 and J301), which are pin-to-pin

compatible to the connectors on the bottom layer of the 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 Figure 1 or 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.