The header J15 offers the possibility to expand the board with additional hardware. The header contains the TWI signals (SDA, SCL), one GPIO pin, ground and 3.3V.
Pinout
| Pin on header | UC3A GPIO name | Other functionality |
|---|---|---|
| 1 | PA29 | TWI clock SCL |
| 2 | PA30 | TWI data SDA |
| 3 | PX16 | TC A1 |
| 4 | -- | -- |
| 5 | -- | GND |
| 6 | -- | VCC3V3 |