USB to serial UART Interface
| Pin | Name | Type |
|---|---|---|
| 16 | 3V3OUT | output |
| 15 | USBDM | bidirectional |
| 14 | USBDP | bidirectional |
| 18 | ~{RESET} | input |
| 27 | OSCI | input |
| 28 | OSCO | output |
| 26 | TEST | input |
| 19 | VCC | power_in |
| 1 | VCCIO | power_in |
| 23 | NC | passive |
| 25 | NC | passive |
| 13 | NC | passive |
| 12 | NC | passive |
| 5 | NC | passive |
| 29 | NC | passive |
| 30 | TXD | output |
| 2 | RXD | input |
| 32 | ~{RTS} | output |
| 8 | ~{CTS} | input |
| 31 | ~{DTR} | output |
| 6 | ~{DSR} | input |
| 7 | ~{DCD} | input |
| 3 | ~{RI} | input |
| 22 | CBUS0 | bidirectional |
| 21 | CBUS1 | bidirectional |
| 10 | CBUS2 | bidirectional |
| 11 | CBUS3 | bidirectional |
| 9 | CBUS4 | bidirectional |
| 20 | GND | power_in |
| 17 | GND | power_in |
| 4 | GND | power_in |
| 33 | EP | power_in |
| 24 | AGND | power_in |
