====== GPIO ======

{{ :en:bpi-r3:r3_gpio.png?nolink |}}

^ Sparefunction ^ Mainfunction ^ pin# ^ xxxxxxxxxxxxxxxxxxxxx ^ pin# ^ Mainfunction  ^ Sparefunction ^
|              |            |    | {{ :en:bpi-r3:gpio_farbig_r3.png?nolink |}} |    |              |              |
| -             | 3V3           |   1  |  ::: |  2   | 5V             | -             |
| I2C_SDA       | GPIO 4       |   3  |  ::: |  4   | 5V             | -             |
| I2C SCL       | GPIO 3       |   5  |  ::: |  6   | GND            | -             |
| PWM1          | GPIO 22      |   7  |  ::: |  8   | GPIO 43        | UART1 TX      |
| -             | GND           |   9  |  ::: |  10  | GPIO 42        | UART1 RX      |
| UART2 TX      | GPIO 30       |  11  |  ::: |  12  | GPIO 64   | PCM_CLK   |
| UART2 RX      | GPIO 29       |  13  |  ::: |  14  | GND            | -             |
| PCM_FS          | GPIO 65      |  15  |  ::: |  16  | GPIO 45 | UART1_RTS         |
| -             | 3V3           |  17  |  ::: |  18  | GPIO 44        | UART1_CTS        |
| SPIC_MO       | GPIO 7       |  19  |  ::: |  20  | GND            | -             |
| SPIC_MI       | GPIO 8       |  21  |  ::: |  22  | GPIO 62        | PCM_DTX       |
| SPIC_CK       | GPIO 6       |  23  |  ::: |  24  | GPIO 14        | SPIC_CS      |
| -             | GND           |  25  |  ::: |  26  | GPIO 63        | PCM_DRX        |

[[..:bpi-r2:gpio|R2-gpio (sysfs)]]
[[..:bpi-r2pro:gpio|R2Pro-gpio (gpiolib)]]