Table 58: 25-Pin Back Connector - Motorola Malux MTM5x00 Series Installation Manual

Pin Function
3 BUS +
4 AUDIO -
5 NC
6 GND
7 Radio On/Off
Control
8 SCI_TX
9 FLT_A +
10 Analog Ground

Table 58: 25-Pin Back Connector

Pin Function
1 GPIO_9
2 GPIO_6
3 GPIO_8
4 GPIO_3
5 VBUS_1B
6 REAR_D -
7 REAR_D +
8 GPIO_0
9 VBUS_2
10 TX
11 RX
12 MIC_REAR_2
Send Feedback
Description
This is used for communication between the radio and an Enhanced
Control Head.
Balanced Audio - (Bidirectional)
Not Connected
Ground
This is the Enhanced Control Head service request input. A level of 5 V
indicates that the Enhanced Control Head needs to communicate with
the radio. In addition it switches on the radio's voltage regulators. The
idle state is a level below 0.6 V.
This if for communication between the radio and the Enhanced Control
Head.
This voltage is at battery voltage level and is available as long as the
radio is connected to the supply voltage. The maximum current is 300
mA. A fuse in the radio prevents further circuit damage in case of short-
ing this pin to ground.
Analog Ground
Description
NGCH GPIO4
External PTT for MIC_REAR_2
NGCH GPIO2 (CPS configurable)
GCAI PIN 2 Mobile Microphone Port, Exter-
nal PTT or MIC_REAR_1, Ground Pin 8 to
activate MIC_REAR_1
GCAI PIN 6: 5V Supply
GCAI PIN 4: USB D -, GPIO_2 (Shared with
the front MMP)
GCAI PIN 8: USB D +, GPIO_1 (Shared with
the front MMP)
GCAI PIN 10: GPIO
Second USB 5 V Supply
4-wire RS232 TX
4-wire RS232 RX
2nd Microphone Input (MIC_REAR_2), Nomi-
nal sensitivity 80 mV rms, Bias voltage 9.3 V
Chapter 5: Connectors and PIN Assignment
Default
Output: Active for dura-
tion of call (car radio
mute). Can be used as
a trigger to a local log-
ger device.
PTT Input, TX audio
from MIC_REAR_2
Disabled
PTT Input, TX audio
from MIC_REAR_1
Disabled
Disabled
Disabled
Input: GCAI detec-
tion / Select Line
Disabled
Disabled
68015000181-LB
Table continued...
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