3.4.4 GPIO Interface

The SAM9X75-Curiosity board features a 40-pin connector (J27) (Raspberry Pi compatible(1)) for free use.

Note:
  1. Raspberry Pi is a trademark of Raspberry Pi Trading.

The following figure shows the 40-pin connector interface.

Figure 3-26. 40-pin Connector Interface

The following table shows the 40-pin connector the signal description.

Table 3-13. 40-pin Connector Signal Description
Pin No.PIOSignal NameSignal Description
1–VDD_3V33.3V
2–5V_MAIN5V
3PC0RPi_GPIO2_I2C_SDA_PC0TWI Data
4–5V_MAIN5V
5PC1RPi_GPIO3_I2C_SCL_PC1TWI Clock
6–GNDGND
7PB25RPi_GPIO4_I2S_MCK/GPCLK0_PB25I2S Host Clock
8PA16RPi_GPIO14_MPU32_TXD_PA16UART Transmit
9–GNDGND
10PA15RPi_GPIO15_MPU32_RXD_PA15UART Receive
11–NCNot Connected
12PB26RPi_GPIO18_I2S_BCLK_PB26I2S Clock
13–NCNot Connected
14–GNDGND
15–NCNot Connected
16PA21RPi_GPIO23_PA21General Purpose I/O
17–VDD_3V33.3V
18PA22RPi_GPIO24_PA22General Purpose I/O
19PC22RPi_GPIO10_SPI_MOSI_PC22SPI MOSI
20–GNDGND
21PC23RPi_GPIO9_SPI_MISO_PC23SPI MISO
22–NCNot Connected
23PC26RPi_GPIO11_SPI_SCK_PC26SPI Clock
24PC25RPi_GPIO8_SPI_NPCS0_PC25SPI Chip Select
25–GNDGND
26–NCNot Connected
27–NCNot Connected
28–NCNot Connected
29–NCNot Connected
30–GNDGND
31–NCNot Connected
32–NCNot Connected
33PC20RPi_GPIO13_PWM1_PC20Pulse Width Modulated
34–GNDGND
35PB15RPi_GPIO19_I2S_WS_PB15I2S Word Select
36–NCNot Connected
37–NCNot Connected
38PB16RPi_GPIO20_I2S_DIN_PB16I2S Data IN
39–GNDGND
40PB17RPi_GPIO21_I2S_DOUT_PB17I2S Data OUT