Pin
Function
Description
4
GPIO_3
GCAI PIN 2 GPIO
5
VBUS_1B
+5 V Supply,
Connected to Pin 6 of Mobile Microphone Port
6
REAR_D -
Rear handset D+ line
7
Rear handset D- line
8
GPIO_0
GCAI Pin 10 GPIO
9
EXT_PWR_12V
External power supply,
12 V or 24 V for External Speaker
10
1_Wire
1-wire
®
bi-directional serial bus,
Connected to GCAI Pin 1 of Mobile Microphone Port
11
MIC_HF1_GND
Ground for external microphone MIC_HF_1
12
MIC_HF1
External microphone input (MIC_HF1),
Nominal sensitivity: 80 mV rms, Bias voltage: 9.3 V or 2.1 V (Selec-
ted accessory dependent)
13
GND
GND Common Ground
14
GPIO_5
Control Head GPIO1 (CPS configured/enabled)
15
GPIO_7
4 Level Analogue Input, 33k to 5.0V PU
16
1_WIRE
1-wire
®
bi-directional serial bus,
Dedicated to power-up detection of IMPRES Visor Mic (input
MIC_HF1)
17
REAR_AUDIO
Handset VOL controlled audio output,
Min RL = 150 Ohm unbalanced,
Connected to GCAI Pin 3 Mobile Microphone Port Connector
18
GND
GND,
Connected to GCAI Pin 5 Mobile Microphone Port
19
MIC_MMP_REAR
Rear microphone input MIC_MMP_REAR,
Input 80 mV rms, Bias voltage 7.7 V,
Connected to GCAI Pin 7 Mobile Microphone Port
20
GPIO_4
GPIO, Hook Input,
Connected to GCAI Pin 9 Mobile Microphone Port.
21
SPK +
Speaker positive line
WARNING:
Do not ground!
22
SPK –
Speaker negative line
WARNING:
Do not ground!
Table continued…
68015000553-KC
Chapter 5: Connectors and PIN Assignment
106
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