Motorola MTM800 - Page 224

A - 10 CONNECTOR PIN FUNCTIONS
Figure A-8 Rear View of the Motorcycle Enhanced Control Head
Pin Function Description Default
1 GPIO_9 GPIO, open collector, 4.7k to FLT_A+ PU Output: 200mA @ low,
0,5mA @ high Input: high > 2V, low < 0.5V
Output: Active for duration of
call (car radio mute)
2 GPIO_6 GPIO, open collector, 4k7 to 5V PU Output: 1mA @ low, 0,5mA @
high Input: high > 2V, low < 0.5V
PTT Input, TX audio from
MIC_REAR_2
3 GPIO_8 GPIO, open collector, 4k7 to 5V PU Output: 1mA @ low, 0,5mA @
high Input: high > 2V, low < 0.5V
Disabled
4 GPIO_3 GCAI PIN 2: 15k to 3V3 PU, 5V tol. Output: see GCAI spec. 1.20
Input: high > 2V, low < 0.5V
PTT Input, TX audio from
MIC_REAR_1
5 VBUS_1B GCAI PIN 6: 5V Supply Disabled
6 REAR_D- GCAI PIN 4: USB D-, GPIO_2 shared with front MMP Disabled
7 REAR_D+ GCAI PIN 8: USB D+, GPIO_1 shared with front MMP Disabled
8 GPIO_0 GCAI Pin 10 GPIO, open coll., 15k to 3V3 PU, 5V tol. Output: see
GCAI spec. 1.20 Input: high > 2V, low < 0.5V
Input, GCAI etection/Select
Line
9 VBUS_2 Second USB, 5V Supply Disabled
10 TX 4 wire RS232 TX, EIA/TIA-232 level
11 RX 4 wire RS232 RX, EIA/TIA-232 level
12 MIC_REAR_2 2nd REAR MIC Input 80mVrms Bias 9V= / 600Ohm Disabled
13 GND GND
14 GPIO_5 GPIO, open collector, 4k7 to 5V PU Output: 1mA @ low, 0,5mA @
high Input: high > 2V, low < 0.5V
Disabled
15 GPI_7 4 Level Analogue Input, 33k to 5,0V PU (refer to graphic below) Enabled
16 1_WIRE GCAI PIN 1, 1-Wire® bi-directional serial bus Disabled
Table A-9 Pin assignment of the 25pin back connector – for RMC and MCC
6866539D31.book Page 10 Tuesday, March 20, 2007 6:32 PM