| Pin | Signal | Description |
|---|---|---|
| 1 | GND | Charger/System Ground |
| 2 | V_OUT | Accessory Output Supply. (3.4V…10V - 50mA) |
| 3 | XMIC | External Microphone Input and Accessory Identification 1,7…2,05 V Headset Adapter Connected 1,15…1,4 V Compact Handsfree Unit Connected *2.22…2.56 V Infra Red Link Conneceted |
| 4 | EXT_RF | External RF Control Input 0…0.5V External RF in use 2.4…3.2V Internal Antenna in use |
| 5 | TX | FBUS Transmit |
| 6 | MBUS | Serial Control Bus Logic Low Level: 0….0.5V Logic High Level:2.4V….3.2V |
| 7 | BENA | Not Connected |
| 8 | SGND | Signal Ground |
| 9 | XEAR | External Speaker and Mute Control Mute ON (HF SPEAKER MUTE ):0…0,5 V d.c. Mute OFF (HF SPEAKER ACTIVE ): 1,0…1,7 V d.c. |
| 10 | Hook | Hook Signal Hook Off (Handset in Use): 0….0.5V Hook On (Handset in Use): 2.4V….3.2V |
| 11 | RX | FBUS Receive |
| 12 | V_IN | Charging Supply Voltage (Max 16V) |
References
- [ExiTuS], NokiaPort.de