Expansion Head - Pin Function - Motorola MTM700 Detailed Service Manual

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Expansion Head - Pin Function

Front View
Caution:
NO Microphone Connector
9 8 7 6 5 4 3 2 1 10
Pin Function
1 FLT_A+
2 5V
3 ON_OFF_CONTROL
4 GROUND
5 SPEAKER -
6 INT_MIC
7 BUS +
8 SPEAKER +
9 HANDSET_AUDIO
10 EXPANSION_PTT
Table 23 Pin Assignment of the 10 Pin TELCO Connector of the Expansion Head
Pin Function
1 DCD
2 RXD
3 TXD
4 DTR
5 GND
Table 24 Pin Assignment of 9 Pin subD Connector of the Expansion Head
MTM700 Mobile Radio / Detailed Service Manual
Figure 6 View of the Expansion Head Connectors
Description
Filtered A+
+ 5V regulated / 100mA
Radio On/Off Control
Ground
Analogue Speaker output +;Speaker impedance has to be > 20Ohms
Microphone analogue input of 80mVRMS,600 Ohm impedance,9V=
SBEP Bus
Analogue Speaker output +;Speaker impedance has to be > 20 Ohms
Handset audio to earpiece impedance has to be > 200 Ohms
Expansion PTT, works together with INT_MIC
Description
Data Carrier Detect
Received Data
Transmitted Data
Data Terminal Ready
Ground
13 1
25
14
25 Pin subD
Connector
CONNECTOR PIN FUNCTIONS
1
5
9 6
9 Pin subD
Connector
PC direction
Input
Serial IN
Serial OUT
Output
Output