Gertboard GPIO Pins

Connecting a ribbon cable between the Raspberry Pi and the Gertboard provides the full complement of GPIO pins on the Gertboard. Here is a list of the pins together with their alternative functions. The motor driver for pulse-width modulation uses the PWM0 function of ALT5. The ADC and DAC use the SPI function pins on ALT0.

GPIO Pull ALT0 ALT1 ALT2 ALT3 ALT4 ALT5
25 LOW RESERVED SD17 RESERVED SD1_DAT1 ARM_TCK P_JV
24 LOW RESERVED SD16 RESERVED SD1_DAT0 ARM_TDO
23 LOW RESERVED SD15 RESERVED SD1_CMD ARM_RTCK
22 LOW RESERVED SD14 RESERVED SD1_CLK ARM_TRST
21 LOW PCM_DOUT SD13 RESERVED BSCSL/CD_N SP11_SCLK GPCLK1
18 LOW PCM_CLK SD10 RESERVED BS SDA/MOSI SP11_CE0_N PWM0
17 LOW RESERVED SD9 RESERVED RTS0 SP11_CE1_N RTS1
15 LOW UART0_RXD SD7 RESERVED RXD1
14 LOW UART0_TXD SD6 RESERVED TXD1
11 LOW SPIO_SCLK SD3 RESERVED
10 LOW SPIO_MOSI SD2 RESERVED
9 LOW SPIO_MISO SD1 RESERVED
8 HIGH SPIO_CE0_N SDO RESERVED
7 HIGH SPIO_CE1_N SWE_N RESERVED
4 HIGH GPCLK0 SA1 RESERVED ARM_TDI
1 HIGH I2C0_SCL SA4 RESERVED
0 HIGH I2C0_SDA SA5 RESERVED