Fitlet3: COM + GPIO connector pinout
From fit-PC wiki
General COM + GPIO connector pinout
| Pin Number | RS232+GPIO | RS485 Half duplex +GPIO | RS485 Full Duplex +GPIO |
|---|---|---|---|
| 1 | Power In | Power In | Power In |
| 2 | GPO (output) | GPO (output) | GPO (output) |
| 3 | GPO (output) | GPO (output) | GPO (output) |
| 4 | GPI (Input) | GPI (Input) | GPI (Input) |
| 5 | GPI (Input) | GPI (Input) | GPI (Input) |
| 6 | TXD | Data- | TX- |
| 7 | RXD | RX+ | |
| 8 | CTS | RX- | |
| 9 | RTS | Data+ | TX+ |
| 10 | GND | GND | GND |
The COM port connector contains: Serial communication (RS232, RS485 Half duplex, and RS485 Full duplex). GPIO (2 Input and 2 Output).
Serial communication pinout:
| Pin Number | RS232 | RS485 Half duplex | RS485 Full Duplex |
|---|---|---|---|
| 6 | TX | TXN/RXN | TXN |
| 7 | RX | - | RXP |
| 8 | CTS# | - | RXN |
| 9 | RTS# | TXP/RXP | TXP |
GPIO pinout:
| Pin Number | GPIO |
|---|---|
| 1 | VCC |
| 2 | GPO 0 |
| 3 | GPO 1 |
| 4 | GPI 0 |
| 5 | GPI 1 |
| 10 | GND |
- The GPIO requires an external VCC to function. (up to 24V)
- The GPIO feature needs the newest FPGA version.
Actual connector's pinout:
