5 pin mini-USB plug
connector at the cable of the AC adapter
| Pin | Name | Description |
|---|---|---|
| 1 | +5 VDC | PC USB Pin 1 (+5 VDC). |
| 2 | USB Data- | shorted to pin x in charger cable. |
| 3 | USB Data+ | NC - Not Connected |
| X | Shorted to pin 2; shorted to pin 4 via 165KOhm resistor in charge cable. | |
| 4 | GND | PC USB pin 4 (GND). Shorted to pin X via 165KOhm resistor in charge cable. |
Notes
- A 165k resistor between pin 2 and 4 is required to enable the charge process. The resistor produces ~1.5vdc on the x pin that is suitable for RAZR V3m and Motorola Q (which works from ~1.2vdc to ~1.9vdc).
- To charge the Motorola RAZR V3 through a simple USB cable (without the resistor) you need a PC driver software.
- The x pin is used by the phone to detect the type of device attached to the port. Shorting Pin 2, 3 and x, put the phone into handsfree/carkit mode and the LCD backlight will ignore timeout settings and stay on.