Motorola MTM800 User Manual page 224

A - 10
Figure A-8 Rear View of the Motorcycle Enhanced Control Head
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
13 GND
14 GPIO_5
15 GPI_7
16 1_WIRE
Table A-9 Pin assignment of the 25pin back connector – for RMC and MCC
Description
GPIO, open collector, 4.7k to FLT_A+ PU Output: 200mA @ low,
0,5mA @ high Input: high > 2V, low < 0.5V
GPIO, open collector, 4k7 to 5V PU Output: 1mA @ low, 0,5mA @
high Input: high > 2V, low < 0.5V
GPIO, open collector, 4k7 to 5V PU Output: 1mA @ low, 0,5mA @
high Input: high > 2V, low < 0.5V
GCAI PIN 2: 15k to 3V3 PU, 5V tol. Output: see GCAI spec. 1.20
Input: high > 2V, low < 0.5V
GCAI PIN 6: 5V Supply
GCAI PIN 4: USB D-, GPIO_2 shared with front MMP
GCAI PIN 8: USB D+, GPIO_1 shared with front MMP
GCAI Pin 10 GPIO, open coll., 15k to 3V3 PU, 5V tol. Output: see
GCAI spec. 1.20 Input: high > 2V, low < 0.5V
Second USB, 5V Supply
4 wire RS232 TX, EIA/TIA-232 level
4 wire RS232 RX, EIA/TIA-232 level
2nd REAR MIC Input 80mVrms Bias 9V= / 600Ohm
GND
GPIO, open collector, 4k7 to 5V PU Output: 1mA @ low, 0,5mA @
high Input: high > 2V, low < 0.5V
4 Level Analogue Input, 33k to 5,0V PU (refer to graphic below)
GCAI PIN 1, 1-Wire® bi-directional serial bus
CONNECTOR PIN FUNCTIONS
Default
Output: Active for duration of
call (car radio mute)
PTT Input, TX audio from
MIC_REAR_2
Disabled
PTT Input, TX audio from
MIC_REAR_1
Disabled
Disabled
Disabled
Input, GCAI etection/Select
Line
Disabled
Disabled
Disabled
Enabled
Disabled