| Pin | USB Signal | UART signal | Hands-free signal |
| 1 | GND | ||
| 2 | USB D+ | RxD | RxD |
| 3 | USB D-/ | TxD | TxD |
| 4 | USB Vbus | n/a | n/a |
| 5 | Power IN | ||
| 6 | Reserved | ||
| 7 | Synchronisation clock | RTS | Tx Voice (analog) |
| 8 | |||
| 9 | n/a | CTS | Rx Voice (analog) |
| 10 | Analog GND | ||
| 11 | GND | ||
| 12 | RF cable detect | ||
| 13 | RF signal | ||
| 14,15,16 | GND | ||
| 17 | Charger + | ||
| 18 | Charger - | ||
| 19 | Bluetooth ANT | ||
For sharp 902 pins 1,5,10 should be shorted in cable?

