25-Pin Subd Connector - Motorola MTM800 Installation Manual

INSTALLATION
Pin Function
10 Analog Ground
9 FLT_A+
8 SCI_TX
7 Radio On/Off Control
6 Ground
5 Speaker -
4 Audio-
3 BUS+
2 Speaker +
1 Audio +

25-Pin subD Connector

Data Expansion Head Enhanced:
The radio must be turned ON/OFF via the Ignition Sense Cable HKN9327, which has to be
connected on Pin 10 of the Accessory Connector on the rear side of the radio.
Pin Function
1 GND
2 RS232_SCI_TX
3 RS232_SCI_RX
4 RS232_RTS
5 RS232_CTS
6 FLT_A+
7 Ground
8 SB9600_BUSY
9 NC
MTM800 Enhanced Mobile Terminal Installation Manual
Table 11 10-Pin TELCO Connector
Analog Ground
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.
This if for communication between the radio and the Enhanced Control Head.
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.
Ground
Negative output of the radio's audio PA.
Balanced Audio - (Bidirectional)
This is used for communication between the radio and an Enhanced Control Head.
Positive output of the radio's audio PA.
Balanced Audio + (Bidirectional)
Table 12 25-Pin subD Connector
Ground
Transmit Data (4-wire RS232 with RS232 level)
Receive Data (4-wire RS232 with RS232 level)
Request to Send (4-wire RS232 with RS232 level)
Clear to Send (4-wire RS232 with RS232 level)
This voltage is at battery voltage level and is available as long as the radio is
connected to the supply voltage. A fuse in the radio prevents further circuit
damage in case of shorting this pin to ground. This pin is only used together
with the pins 14, 20, and 23 to select flashing and programming mode, or to
switch the radio on.
Ground for RS232
SB9600 Busy
Not Connected
Description
Description
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