| Pin | Signal | Dir | Description |
|---|---|---|---|
| 1 | GND | - | signal- and charge ground (connected to pin 7) |
| 2 | USB_D+ | IN/OUT | positive USB data signal |
| 3 | USB_D- | IN/OUT | negative USB data signal |
| 4 | VBUS | IN | USB VBUS signal |
| 5 | HOTSYNC | IN | hotsnyc button - connected to +3.3V triggers a hotsync |
| 6 | n/c | not connected | |
| 7 | GND | signal- and charge ground (connected to pin 1) | |
| 8 | ID | IN | indentification for peripheral |
| 9 | VOUT | OUT | +3.2V supply output, 100mA max. |
| 10 | RxD | IN | RS-232 RxD signal |
| 11 | TxD | OUT | RS-232 TxD signal |
| 12 | DETECT | IN | peripheral detect - tied to ground by peripherals |
| 13 | CTS | IN | RS-232 CTS signal |
| 14 | RTS | OUT | RS-232 RTS signal |
| 15 | DTR | OUT | RS-232 DTR signal |
| 16 | CHARGE | IN | +5V charge supply input, 500-700mA min. |
Notes
- The VOUT pin supplies regulated 3.2V and a max. current of 100mA.
- VOUT is equipped with an internal 250mA SMT soldered fuse! If it’s blown, it has to be replaced. So if you don’t own an SMT workplace and the appropriate skill, you better don’t fiddle with that pin. Let alone purchasing the fitting fuse (case 0603, Littlefuse).
- The ID pin enables a peripheral device to identify itself. Depending on the resistance to GND, external devices can identify themselves as a USB cradle, an RS-232 cradle, a USB peripheral, an RS-232 peripheral or as a modem.