Motorola MTM800 - Data Expansion Head Enhanced - Pin Function

CONNECTOR PIN FUNCTIONS A - 7
Data Expansion Head Enhanced - Pin Function
Figure A-6 View of the Data Expansion Head Enhanced Connectors
Pin Function Description
1 Audio + Balanced Audio + (Bidirectional)
2 Speaker + Positive output of the radio's audio PA.
3 BUS+ This is used for communication between the radio and an Enhanced
Control Head.
4 Audio- Balanced Audio - (Bidirectional)
5 Speaker - Negative output of the radio’s audio PA.
6 Ground Ground
7 Radio On/Off Control This is the Enhanced Control Head service request input. A level of 5
volts 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 0.6V.
8 SCI_TX This if for communication between the radio and the Enhanced Con-
trol Head.
9 FLT_A+ 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
300mA. A fuse in the radio prevents further circuit damage in case of
shorting this pin to ground.
10 Analog Ground Analog Ground
Table A-6 Pin Assignment of the 10 Pin TELCO Connector of the Data Expansion Head Enhanced
Front View
CAUTION:
NOT
NOT
a Microphone Connector
25-Pin subD
Connector
9-Pin subD
Connector
1
13
14
25
1
5
6
9
10-Pin TELCO
Connector
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6866539D31.book Page 7 Tuesday, March 20, 2007 6:32 PM