Raspberry Pi GPIO Pinout
This GPIO Pinout is an interactive reference to the Raspberry Pi GPIO pins, and a guide to the Raspberry Pi's GPIO interfaces. Pinout also includes hundreds of pinouts for Raspberry Pi add-on boards, HATs and pHATs .
PCM at Raspberry Pi GPIO Pinout
PCM (Pulse-code Modulation) is a digital representation of sampled analog. On the Raspberry Pi it's a form of digital audio output which can be understood by a DAC for high quality sound.
I2C at Raspberry Pi GPIO Pinout
GPIO 2 and GPIO 3 - the Raspberry Pi's I2C1 pins - allow for two-wire communication with a variety of external sensors and devices. The I2C pins include a fixed 1.8 kΩ pull-up resistor to 3.3v. They are not suitable for use as general purpose IO where a pull-up might interfere.
GPIO 8 (SPI Chip Select 0) at Raspberry Pi GPIO Pinout
Orientate your Pi with the GPIO on the right and the HDMI port(s) on the left. GPIO (General Purpose IO) SPI (Serial Peripheral Interface) I 2 C (Inter-integrated Circuit) UART (Universal Asynchronous Receiver/Transmitter) PCM (Pulse Code …
UART at Raspberry Pi GPIO Pinout
UART is commonly used on the Pi as a convenient way to control it over the GPIO, or access the kernel boot messages from the serial console (enabled by default). It can also be used as a way to interface an Arduino, bootloaded ATmega, ESP8266, etc with your Pi.
PiTFT Plus 3.5" at Raspberry Pi GPIO Pinout
The PiTFT+ features a 3.5" display with 480x320 16-bit color pixels and a resistive touch overlay and is engineered specifically to work with the Raspberry Pi 3, 2 and the Model A+/B+. The display uses the hardware SPI pins as well as GPIO #25 and #24.
JTAG at Raspberry Pi GPIO Pinout
JTAG is a standardised interface for debugging integrated circuits which you can use to debug your Raspberry Pi. There are two separate JTAG interfaces available on the Pi: Alt5 on GPIOs 4, 5, 6, 12 and 13; Alt4 on GPIOs 22, 23, 24, 25, 26 and 27
SDIO at Raspberry Pi GPIO Pinout
SDIO is the SD host/eMMC interface on the Raspberry Pi. SD host signals are normally used for the microSD slot. These pins are "SD host" on Alt0 and "eMMC" on Alt3.
Ground at Raspberry Pi GPIO Pinout
For example, it's a good idea to use Physical Pin 17 for 3v3 and Physical Pin 25 for ground when using the SPI connections, as these are right next to the important pins for SPI0. Spotted an error, want to add your board's pinout?
GPCLK at Raspberry Pi GPIO Pinout
Orientate your Pi with the GPIO on the right and the HDMI port(s) on the left. GPIO (General Purpose IO) SPI (Serial Peripheral Interface) I 2 C (Inter-integrated Circuit) UART (Universal Asynchronous Receiver/Transmitter) PCM (Pulse Code …