Datasheet

9.3. Expansion Headers

Table 9-2 and Table 9-3 show the controller pin headers and their corresponding microcontroller connections. The

header pins connect directly to the MCU pin. Note that the J17/J18 header numbers match the MCU pin numbers.

J17 Pin MCU Pin RDK Function (MCU Port) J17 Pin MCU Pin RDK Function (MCU Port)

1 1 Not Used (P120) 2 2 WIFI Power Off (P43)

3 3 Speaker Amp. Shutdown (P42) 4 4 MIC Amp. Shutdown (P41)

5 5 TOOL0 (P40) 6 6 RESETn

7 x 8 x

9 9 User Switch 1 (P137) 10 x

11 x 12 x

13 13 GND 14 14 GND

15 15 3V3_MCU 16 15 3V3_MCU

17 17 I

C SCL (P60) 18 18 I

C SDA (P61)

19 19 LED2 (P62) 20 20 LED3 (P63)

21 21 Infrared Input (P31) 22 22 PMOD IRQB (P77)

23 23 PMOD IRQA (P76) 24 24 PMOD PIN9 (P75)

25 25 WIFI IRQ (P74) 26 26 WIFI SPI CS (P73)

27 27 PMOD2 SPI CS (P72) 28 28 PMOD1 SPI CS (P71)

29 29 LCD Backlight Enable (P70) 30 30 TRIAC PWM (P06)

31 31 FET PWM (P05) 32 32 SD SPI CS (P30)

Table 9-2: J17 Expansion Header