Single-Chip USB to UART Bridge
| Pin | Name | Type |
|---|---|---|
| 7 | REGIN | power_in |
| 8 | VBUS | input |
| 3 | D+ | bidirectional |
| 4 | D- | bidirectional |
| 6 | VDD | power_in |
| 5 | VIO | power_in |
| 10 | NC | passive |
| 13 | NC | passive |
| 14 | NC | passive |
| 15 | NC | passive |
| 20 | NC | passive |
| 21 | NC | passive |
| 2 | GND | power_in |
| 29 | EP | power_in |
| 9 | ~{RST} | bidirectional |
| 12 | SUSPEND | output |
| 11 | ~{SUSPEND} | output |
| 1 | RI | input |
| 28 | DCD | input |
| 27 | DTR | output |
| 26 | DSR | input |
| 25 | TXD | output |
| 24 | RXD | input |
| 23 | RTS | output |
| 22 | CTS | input |
| 16 | GPIO3 | bidirectional |
| 17 | GPIO2 | bidirectional |
| 18 | GPIO1 | bidirectional |
| 19 | GPIO0 | bidirectional |
