Data Expansion Head Enhanced - Pin Function - Motorola MTM800 User Manual

CONNECTOR PIN FUNCTIONS

Data Expansion Head Enhanced - Pin Function

Front View
CAUTION:
NOT NOT a Microphone Connector
1 2 3 4 5 6 7 8 9 10
J302
Figure A-6 View of the Data Expansion Head Enhanced Connectors
Pin Function
1 Audio +
2 Speaker +
3 BUS+
4 Audio-
5 Speaker -
6 Ground
7 Radio On/Off Control
8 SCI_TX
9 FLT_A+
10 Analog Ground
Table A-6 Pin Assignment of the 10 Pin TELCO Connector of the Data Expansion Head Enhanced
13
25
10-Pin TELCO 25-Pin subD
Connector Connector
Description
Balanced Audio + (Bidirectional)
Positive output of the radio's audio PA.
This is used for communication between the radio and an Enhanced
Control Head.
Balanced Audio - (Bidirectional)
Negative output of the radio's audio PA.
Ground
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.
This if for communication between the radio and the Enhanced Con-
trol 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
300mA. A fuse in the radio prevents further circuit damage in case of
shorting this pin to ground.
Analog Ground
1
1
5
9 6
14
9-Pin subD
Connector
A - 7