Pin | Signal | Description |
1 | Gnd | |
2 | Rx | USB D+ at least in NEC N8, E616, E313. |
3 | Tx | USB D- at least in NEC N8, E616, E313. |
4 | Vcc | USB +5V |
5 | + | charger input, power from PC USB (+5V) may be used for charging |
Pins 4,5 should be shorted together and pins 8,9,10 should be shorted together in USB data cable