| Mobile phone interface pin | Description |
|---|---|
| 1 | GND |
| 2 | R=25 or 33 KOhm to GND in data or charge cable |
| 3 | +6v charge voltage |
| 4 | Tx |
| 5 | Rx |
| 6 | RTS |
| 7 | Vbus (connect to pin 3 if not used as IC power) |
| 8 | CTS |
| 9 | DCD |
| 10 | RE |
| 11 | DTR |
| 12 | DSR |
| 13 | Serial Enable (if this pin is not pulled to ground your serial cable will not work) |
Pins 6,8; pins 13 and 1 should be shorted in cable.
USB pinout (used at least in Motorola Nextel i205, i305, i530, i730, i830, i930).
| Mobile phone interface pin | Description |
|---|---|
| 1 | GND |
| 4 | Rx (may be connected to PC USB port, USB D+) |
| 5 | Tx (may be connected to PC USB port, USB D-) |
| 6 | VBus May be pin 7??? |
For v600 whith charge, pin 3 and 6 be shorted. USB D+ connect to pin4, USB D- connect to pin5. R=25 KOhm connect to pin1 and pin2. Do not pin 3 and 6 shorted in phone, must be in cable!