GPIO Pinout

General Purpose Input Output (GPIO)

Resources:

1. eLinux.org RPi Low-level peripherals

Notes:

1. GPIO pins are 3.3 volt logic levels and are not tolerant of 5V levels
2. GPIO properties can be set as a block (GPIO pins 0-27 are in the same block) not per pin.
   1. Can interrupt based on high/low/rise/fall/change.
   2. Input hysteresis (Schmitt trigger) can be on or off,
   3. Output slew rate can be fast or limited, and
   4. Source and sink currents are configurable from 2 mA up to 16 mA.

Color Legend

Color Legend
3.3 VDC Power	Serial Console/Power
5 VDC Power	HX711 Scale
Ground	I2C Sensors
Unused	I2S Audio

GPIO ordered by Header Pins

The first 26 pins on J8 (A+ and B+ models) are the same as H1 on the A and B models.

Hivetool use Reserved for I2C Sensors Reserved for I2C Sensors Reserved for I2C Sensors Unused Reserved for I2C Sensors Unused Unused Unused Unused Unused Unused Unused Unused Unused Unused Unused Unused Reserved I2S Unused Unused

Raspberry Pi 3.3 VDC Power GPIO 2 I2C GPIO 3 I2C GPIO 4 Ground GPIO 17 GPIO 27 GPIO 22 3.3 VDC Power GPIO 10 SPIO MOSI GPIO  9 SPIO MISO GPIO 11 SPIO SCLK Ground I2C EEPROM ID_SD GPIO 5 GPIO 6 GPIO 13 GPIO 19 PCM_FS GPIO 26 Ground

J8 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40

Raspberry Pi 5 VDC Power 5 VDC Power Ground GPIO 14 TXDO GPIO 15 RXDO GPIO 18 PCM_CLK Ground GPIO 23 GPIO 24 Ground GPIO 25 GPIO 8 GPIO 7 I2C EEPROM ID_SC Ground GPIO 12 PWM Ground GPIO 16 GPIO 20 PCM_DIN GPIO 21 PCM DOUT

Hivetool use Reserved Power HX711 Reserved Power Reserved Ground Reserved serial console Reserved serial console Reserved I2S Unused Reserved HX711 Reserved HX711 Reserved HX711 Unused Unused Unused Unused Unused Unused Unused Unused Reserved I2S Reserved I2S

H5 is only used on the A and B models. GPIO 28-31 are not available on the + models. These signals should probably not be used.

Hivetool Unused Unused Unused Unused

R Pi 5 VDC Power GPIO 28 GPIO 30 Ground

H5 1 2 3 4 5 6 7 8

R Pi 3.3 VDC Power GPIO 29 GPIO 31 Ground

Hivetool Unused Unused Unused Unused

GPIO ordered by Signal Name

Signal	J8
3.3 VDC Power	1
3.3 VDC Power	17
5 VDC Power	2
5 VDC Power	4
GPIO 2 I2C	3
GPIO 3 I2C	5
GPIO 4	7
GPIO 5	29
GPIO 6	31
GPIO 7	26
GPIO 8	24
GPIO 9 SPIO MISO	21
GPIO 10 SPIO MOSI	19
GPIO 11 SPIO SCLK	23
GPIO 12 PWM	32
GPIO 13	33
GPIO 14 TXDO	8
GPIO 15 RXDO	10
GPIO 16	36
GPIO 17	11
GPIO 18 PCM_CLK	12
GPIO 19 PCM_FS	35
GPIO 20 PCM_DIN	38
GPIO 21 PCM DOUT	40
GPIO 22	15
GPIO 23	16
GPIO 24	18
GPIO 25	22
GPIO 26	37
GPIO 27	13
I2C EEPROM ID_SD	27
I2C EEPROM ID_SC	28
Ground	6
Ground	9
Ground	14
Ground	20
Ground	25
Ground	30
Ground	34
Ground	39