Single-Chip USB to UART Bridge
| Pin | Name | Type |
|---|---|---|
| 7 | REGIN | power_in |
| 8 | VUSB | input |
| 3 | D+ | bidirectional |
| 4 | D- | bidirectional |
| 6 | VDD | power_in |
| 5 | VIO | power_in |
| 10 | NC | passive |
| 16 | VPP | passive |
| 2 | GND | power_in |
| 25 | EP | power_in |
| 9 | ~{RST} | bidirectional |
| 17 | SUSPEND | output |
| 15 | ~{SUSPEND} | output |
| 1 | RI | input |
| 24 | DCD | input |
| 23 | DTR | output |
| 22 | DSR | input |
| 21 | TXD | output |
| 20 | RXD | input |
| 19 | RTS | output |
| 18 | CTS | input |
| 11 | GPIO.3 | bidirectional |
| 12 | GPIO.2 | bidirectional |
| 13 | GPIO.1 | bidirectional |
| 14 | GPIO.0 | bidirectional |
