Pinout of the 12-pin special connector on Nokia 16xx, 3110, and 8110 mobile phones, used by third-party data, sync, and charging cables.
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12 pin Nokia 8110 cell phone special connector at the cellular phone
This page documents the connector used by third-party data, sync, and charging cables for the Nokia 16xx, 3110, and 8110 family of handsets. The pin layout is specific to this model family and their shared 12-pin special connector. Only the pins utilised by the cable are listed below.
Pin
Name
Description
1
GND
Charger/System Ground
2
V_OUT
Accessory Output Supply. (3.4V…10V - 50mA)
3
XMIC
External Microphone Input and Accessory Identification
4
EXT_RF
External RF Control Input
5
TX
FBUS Transmit (N/C in 1610?)
6
MBUS
Serial Control Bus
7
BENA
Not Connected
8
SGND
Signal Ground
9
XEAR
External Speaker and Mute Control
10
Hook
Hook Signal
11
RX
FBUS Receive (N/C in 1610?)
12
V_IN
Charging Supply Voltage (Max 16V)
XMIC: External Microphone Input and Accessory Identification
U low
U high
Description
1.15 V
1.4 V
Compact Handsfree Unit Connected
1.7 V
2.05
Headset Adapter Connected
2.22 V
2.56 V
Infra Red Link Conneceted
EXT_RF: External RF Control Input
U low
U high
Description
0.0 V
0.5 V
External RF in use
2.4 V
3.2 V
Internal Antenna in use
MBUS: Serial Control Bus
U low
U high
Description
0.0 V
0.5 V
Logic Low Level
2.4 V
3.2 V
Logic High Level
XEAR: External Speaker and Mute Control
U low
U high
Description
0.0 V
0.5 V
Mute ON (HF Speaker Mute)
1.0 V
1.7 V
Mute OFF (HF Speaker Active)
Hook: Hook Signal
U low
U high
Description
0.0 V
0.5 V
Hook Off (Handset in Use)
2.4 V
3.2 V
Hook On (Handset in Use)
Notes
Pin numbers refer to the connector on the handset; pins not listed are unused by the cable.
12 pin Nokia 8110 cell phone special connector at the cellular phone