Motorola MTM700 Detailed Service Manual page 321

CONNECTOR PIN FUNCTIONS
Pin Name
1 N.C.
2 EMC_KEYLOAD
3 RESET
4 BUS-
5 N.C.
6 N.C.
7 GND
8 RX_AUDIO
9 MIC_ON_OFF
10 N.C.
11 EMC_KEYFAIL
12 N.C.
13 GND
14 BUSY
15 BUS+
16 N.C.
17 A+
18 SWB+
MTM700 Mobile Radio / Detailed Service Manual
Function Input/Output
Keyload In
SB9600 In/Out
Reset
SB9600 Bus- In/Out
Ground In/Out
Received In
Audio
Mic On/Off In
Keyfail In/Out
Ground In/Out
SB9600 Busy In/Out
SB9600 Bus+ In/Out
Battery In
Battery Switch In
Table 26 Motorcycle Control Head Connector Pin Functions
Description
Not connected.
Used for encryption key loading.
This is part of the Motorola Bus to connect external
devices.
This is part of the Motorola Bus to connect external
devices.
Not connected
Not connected
Used as ground.
The nominal input level of this low level audio is 80mV.
The input impedance is 560 ohms.
Used as an audio for earpiece.
This Microphone input is parallel to the Microphone
input of the control head microphone connector.
The nominal input level is 80 mV.
The DC impedance is 20 k
560 ohms.
Pulling this line low (below 0.6 VDC) will switch the
radio on or off, depending of the previous state.
Note: Only one microphone should be active at the
same time, to make sure that no on/off function is
detected by the radio.
Not connected.
Used for encryption data.
Not connected.
Used as ground.
This is part of the Motorola Bus to connect external
devices.
This is part of the Motorola Bus to connect external
devices.
Not connected
The voltage is 13.2 V nominal. Available when the
radio is connected to the battery.
The voltage is 13 V, nominal. It is available when the
radio is switched on.
A - 11
Ω
and the AC impedance is