Table 86: 25-Pin Back Connector
Pin Function Description
1 GPIO_9 Output: Active for duration of call (car radio mute)
2 GPIO_6 External PTT for MIC_HF1,
Ethernet Control Head GPIO6
3 GPIO_8 Control Head GPIO2 (CPS configurable)
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_D + 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
®
bidirectional 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 (Selected
accessory dependant)
13 GND GND Common Ground
14 GPIO_5 Control Head GPIO1 (CPS configured/enabled)
15 GPIO_7 4 Level Analog Input, 33 k to 5.0 V PU
16 1_WIRE 1-wire
®
bidirectional 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 Ω 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
: Do not ground!
MN009998A01-AA
Chapter 4: Connectors and PIN Assignment
110
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