812 B
812 B
User Accessible GPIOs (P3)
Helios64 provides 22 GPIOs on header P3 which can be used for user application. Those GPIOs are provided via an 16-bit IO Expander PCA9655E connected to I2C bus 0.
Pinout Table
| PIN | Port | Remarks |
|---|---|---|
| 1 | - | 3.3V Supply |
| 2 | - | 5V Supply |
| 3 | - | GND |
| 4 | EXP_P0_0 | |
| 5 | EXP_P0_1 | |
| 6 | EXP_P0_2 | |
| 7 | EXP_P0_3 | |
| 8 | EXP_P0_4 | |
| 9 | EXP_P0_5 | |
| 10 | EXP_P0_6 | |
| 11 | EXP_P0_7 | |
| 12 | EXP_P1_0 | |
| 13 | EXP_P1_1 | |
| 14 | EXP_P1_2 | |
| 15 | EXP_P1_3 | |
| 16 | EXP_P1_4 | |
| 17 | EXP_P1_5 | |
| 18 | EXP_P1_6 | |
| 19 | EXP_P1_7 | |
| 20 | - | GND |