928 B
928 B
User Accessible GPIOs (P5)
Helios64 provides 22 GPIOs on header P5 which can be used for user application. Those GPIOs are provided via an 16-bit IO Expander PCA9655E connected to I2C bus 2.
Unlike Helios4 whereas some pin of IO expander is used for system usage, on Helios64 all 16 GPIOs can be used for user application.
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 |