Raspberry Pi I/O

This section describes the Peripheral I/O interfaces available to your apps running on the Raspberry Pi 3.

The Raspberry Pi has pins that are multiplexed between various board functions. Some board functions cannot be used simultaneously (for example, enabling Bluetooth and using the UART0 port for peripheral I/O). For more information, see the function mode matrix.

The following pinout diagram illustrates the locations of the available ports exposed by the breakout connectors of this board:

GPIO Signal Alternate Functions
BCM2I2C1 (SDA)
BCM3I2C1 (SCL)
BCM7SPI0 (SS1)
BCM8SPI0 (SS0)
BCM9SPI0 (MISO)
BCM10SPI0 (MOSI)
BCM11SPI0 (SCLK)
BCM13PWM1
BCM14UART0 (TXD)MINIUART (TXD)
BCM15UART0 (RXD)MINIUART (RXD)
BCM18I2S1 (BCLK)PWM0
BCM19I2S1 (LRCLK)
BCM20I2S1 (SDIN)
BCM21I2S1 (SDOUT)