Connectors P1, P3, P4, P6, P7, and P8 are used to connect the DK add-on to the nRF51 DK.
Through these connectors, all the functionality of the DK add-on can be accessed by the nRF51 DK. See nRF51 DK interface connections for pin information.
| Pin | Label | Description | Short |
|---|---|---|---|
| P1_1 | VIO | Voltage domain VIO | |
| P1_2 | VIO | Voltage domain VIO | |
| P1_3 | NC | Not connected | |
| P1_4 | VIO | Voltage domain VIO | |
| P1_5 | V5V | Voltage domain V5V | |
| P1_6 | GND | Ground | |
| P1_7 | GND | Ground | |
| P1_8 | VIN | Voltage domain VIN | |
| P3_1 | TP SHDN | TP voltage regulator on/off | |
| P3_2 | A1 | LD3 control | SB1 |
| P3_3 | I2S LRCK | ADC audio data left and right | |
| P3_4 | I2S MCLK | Master clock | |
| P3_5 | NC | Not connected | |
| P3_6 | I2S DOUT | ADC audio data | |
| P4_1 | I2S SCLK | Audio data bit clock | SB33 |
| P4_2 | I2S SCLK | Audio data bit clock | SB3 |
| P4_3 | D2 | Connected to D3 | |
| P4_4 | D3 | Connected to D2 | |
| P4_5 | POWER ON/OFF | Control signal power switch | |
| P4_6 | D5 | LD4 control | SB4 |
| P4_7 | I2S CLK2 | I2C 2 clock | SB5 |
| P4_8 | ICM-20608 INT | Motion tracking device interrupt | SB6 |
| P6_1 | DISCHARGE | Discharges the TP voltage regulator | SB10 |
| P6_2 | NC | Not connected | SB9 |
| P6_3 | NC | Not connected | |
| P6_4 | IR LED | Infrared LED control signal input | |
| P6_5 | WU IRQ | TP interrupt or I/O expander interrupt | SB11 |
| P6_6 | LIS3DH INT1 | Low-power accelerometer interrupt 1 | |
| P6_7 | GND | Ground | |
| P6_8 | I2C_DATA2 | I2C 2 data | SB12 |
| P6_9 | I2C_DATA | I2C 1 data | |
| P6_10 | I2C_CLK | I2C 1 clock | |
| P7_1 | NC | Not connected | |
| P7_2 | NC | Not connected | |
| P7_3 | NC | Not connected | |
| P7_4 | NC | Not connected | |
| P7_5 | NC | Not connected | |
| P7_6 | GND | Ground | |
| P8_1 | NC | Not connected | |
| P8_2 | NC | Not connected | |
| P8_3 | NC | Not connected | |
| P8_4 | NC | Not connected | |
| P8_5 | NC | Not connected | |
| P8_6 | NC | Not connected | |
| P8_7 | NC | Not connected | |
| P8_8 | NC | Not connected | |