5 Hardware description: Smart Remote 3 DK add-on
Doc. ID 4374_139 v1.1
Page 38
Table 2: nRF51 DK interface connections
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 I
2
C 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 I
2
C 2 data SB12
P6_9 I2C_DATA I
2
C 1 data
P6_10 I2C_CLK I
2
C 1 clock
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