Pin | Name | Direction | Color | Description |
1 | Vin | | | Charger input |
2 | GND | | | Charger ground |
3 | ACI | | | Accessory Control Interface (short with pin 2 for handsfree recognition) |
4 | V Out | | | Connected to pin 3 in DKU-2 usb data cable |
5 | USB Vbus | | | Also act as USB power detection? Should be connected to USB pin 1 in usb data cable. |
6 | FBus Rx/USB D+ | | | USB exists only in some models*. Should be connected to USB pin 3 in usb data cable. |
7 | FBus Tx/USB D- | | | USB exists only in some models*. Should be connected to USB pin 2 in usb data cable. |
8 | GND | | | Data GND |
9 | X Mic- | | | Audio in - Ext. Mic input negativ |
10 | X Mic+ | | | Audio in - Ext. Mic input positiv |
11 | HS Ear L- | | | Audio out - Ext. Audio out - left, negativ |
12 | HS Ear L+ | | | Audio out - Ext. Audio out - left, positiv |
13 | HS Ear R- | | | Audio out - Ext. audio out - right, negativ |
14 | HS Ear R+ | | | Audio out - Ext. audio out - right, positiv. Pins 10-14 may be used for antenna connection. |
15 | GND | | | shield GND in cavities |