Switches, Jumpers And Buttons - Ublox EVK-R8 Series User Manual

• No position (no jumper socket on J601): main 8-wire UART interface or main 4-wire UART with
auxiliary 4-wire UART interfaces, routed to the dual-in-line male header connectors mounted on
the top of the adapter board ADP-R8, allowing a connection to an external compatible device with
the on-board / B2B switch (SW401) on the EVB-WL3 board set to "B2B".
Figure 3: 3-pin header J601 available to set the routing of the UART interfaces
The other peripherals of the cellular module are available on the dual-in-line male header connectors
(J402 / J403) on the top layer of the cellular adapter board ADP-R8.
The lower board is compatible with other u-blox cellular adapter boards. It contains additional
switches, jumpers, connectors, LEDs and parts that are partially described in
document, because they are intended for use only with other u-blox cellular modules. It is
recommended to leave any additional connector unconnected, and to leave any additional switch in
its default configuration.

1.3 Switches, jumpers and buttons

Function Description
Main power switch Power on / off the whole evaluation kit
Cellular VCC Jumper socket to provide the 3.8 V supply to the cellular VCC input
Cellular power-on Push button to switch-on the cellular system of LENA-R8
Cellular reset Push button to reset the cellular system of LENA-R8
Cellular UART detach Slide switch to attach / detach cellular UART from USB / RS232 connectors:
when detached, UART signals available only on DIL B2B connector on ADP board
Cellular UART routing Slide switch to select cellular main UART routing on USB or on RS232 connector
Cellular GPIO detach Slide switch to attach / detach the cellular GPIOs from peripherals: when detached,
the signals are available only on the DIL B2B connector on ADP-R8 board
Cellular GNSS detach Slide switch to attach / detach the cellular system of LENA-R8 to the GNSS module
mounted on the ADP-GNSS: when detached, signals are available only on DIL B2B
connector on ADP-R8 board
GNSS V_BCKP Slide switch to connect / disconnect backup battery to V_BCKP pin of the GNSS
module mounted on the ADP-GNSS
Cellular VCC Jumper socket to provide the 3.8 V supply to the cellular VCC input
Cellular UARTs routing Jumper to route cellular UART interfaces to the USB two UARTs connector on the
ADP-R8 (both Main and Auxiliary UART) or to lower EVB-WL3 motherboard by
means of Dual-In-Line male Board-to-Board connectors (only Main UART)
Cellular USB boot
Slide switch to select cellular system boot mode: normal operating boot mode or
USB boot mode for FW update
VCC_GNSS enable Jumper socket to enable 1.8 V supply to VCC_GNSS input of LENA-R8001M10
VBCKP_GNSS enable Jumper socket to enable 1.8 V supply to VBCKP_GNSS input of LENA-R8001M10
Table 1: EVK-R8 switch and button descriptions
UBX-22018774 - R01
C1-Public
J601 pin 1
J601 pin 3
Starting up
EVK-R8 - User guide
Figure 1 or in this
Name Board
SW400 EVB
J404 EVB
SW302 EVB
SW303 EVB
SW401 EVB
SW403 EVB
SW300 EVB
SW304 EVB
SW204 EVB
J102 ADP-R8
J601 ADP-R8
J200 ADP-R8
J701 ADP-R8
J702 ADP-R8
Page 6 of 20