Connector pinouts

Table 1. Pinout of connector P4
Pin	Signal	Description
1	SCL_EXT	External I²C clock
2	SDA_EXT	External I²C data
3	ANA/DIG0	GPIO of the nRF52832
4	ANA/DIG1	GPIO of the nRF52832
5	ANA/DIG2	GPIO of the nRF52832
6	GND	Ground
7	IOEXT0	GPIO of the I/O expander
8	IOEXT1	GPIO of the I/O expander
9	IOEXT2	GPIO of the I/O expander
10	IOEXT3	GPIO of the I/O expander
11	MOS_1_D	Drain of n-channel MOSFET 1
12	MOS_1_S	Source of n-channel MOSFET 1
13	MOS_2_D	Drain of n-channel MOSFET 2
14	MOS_2_S	Source of n-channel MOSFET 2
15	MOS_3_D	Drain of n-channel MOSFET 3
16	MOS_3_S	Source of n-channel MOSFET 3
17	MOS_4_D	Drain of n-channel MOSFET 4
18	MOS_4_S	Source of n-channel MOSFET 4
19	VDD	Power supply, controlled by the VDD power switch
20	GND	Ground

Table 2. Pinout of connectors P5 and P7
Pin	Signal	Description
1	SCL_EXT	External I²C clock
2	SDA_EXT	External I²C data
3	VREG	Power supply, no power control
4	GND	Ground

Table 3. Pinout of connector P6
Pin	Signal	Description
1	ANA/DIG0	GPIO of the nRF52832
2	ANA/DIG1	GPIO of the nRF52832
3	VDD	Power supply, controlled by the VDD power switch
4	GND	Ground

Table 4. Pinout of connector P8
Pin	Signal	Description
1	ANA/DIG2	GPIO of the nRF52832
2	N/A	No connection
3	VDD	Power supply, controlled by the VDD power switch
4	GND	Ground