| 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) |
