20-pin IDC ribbon connectors for parallel bus connections and board-to-board expansion at 2.54mm pitch.
| Pin | Name | Function | Type |
|---|---|---|---|
| 1 | Pin 1 | Signal | I/O |
| 2-18 | Pins 2-18 | Data or signal | I/O |
| 19 | VCC | Power common | PWR |
| 20 | GND | Ground | GND |
20-pin IDC ribbon connectors for parallel bus connections and board-to-board expansion at 2.54mm pitch.