Hardware description
Solder bridge Default Function
SB24 Open Short to enable P0.14 as a normal GPIO
SB25 Open Short to enable P0.15 as a normal GPIO
SB26 Closed Cut to disable the rgw pull-up resistor of the RESET line
SB27 Closed Cut to disconnect the nRF5340 CTS line from the signal switch and
interface MCU
SB28 Closed Cut to disconnect the nRF5340 RTS line from the signal switch and
interface MCU
SB29 Closed Cut to disconnect the nRF5340 RxD line from the signal switch and
the interface MCU
SB30 Closed Cut to disconnect the nRF5340 TxD line from the signal switch and
interface MCU
SB31 Open Short to bypass the USB detect switch
SB32 Open Short to permanently enable the I
2
C pull-up resistors
SB33 Closed Cut to permanently disable the I
2
C pull-up resistors
SB34 Open Short to bypass the power switch on the USB power
SB35 Open Short to bypass the power switch on the coin cell battery power
SB36 Open Short to bypass the power switch on the external supply power
SB37 Open Short to bypass the interface MCU power switch
SB38 Closed Cut to disable VDD power to the Arduino interface
SB39 Open Short to bypass the power switch for regulator, coin cell, or external
supply
SB40 Closed Cut for current measurements of the VDD_nRF
SB41 Closed Cut for current measurements of the VDD_nRF_HV
SB42 Closed Cut to disconnect the RESET button from the application nRF5340
RESET pin when the interface MCU is disconnected
SB43 Open Short to connect the RESET button to the RESET pin on the Arduino
interface
SB44 Open Short to connect the RESET pin on the Arduino interface to the
nRF5340 reset pin
SB45 Open Short to connect the RESET pin on the Arduino interface to the
interface nRF5340 reset pin when the interface MCU is disconnected
SB46 Open Short to connect the RESET pin on the Arduino interface to the
interface MCU Boot when the interface MCU is disconnected
SB47 Open Short to enable power supply of the external device when using the
debug out connector
SB48 Open Short to bypass the interface MCU USB power switch
SB50 Closed Cut to disconnect the nRF5340 CTS line from the signal switch and
interface MCU
4406_638
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