TM8100/TM8200 Service Manual
TMAA02-02 DTMF Microphone
491
© Tait Electronics Limited
June 2006
20.4
Interface Specification
The following table and diagram summarizes the signals used for the DTMF
microphone on the radio’s microphone connector and shows the interface
between the DTMF microphone and the radio.
.
Table 20.2
DTMF microphone connector—pins and signals
Pin
Signal
Colour
Description
1
—
—
not connected
2
13V8_SW
red
power supply (switched)
3
—
yellow
not connected
4
MIC_PTT
black
PTT and hookswitch
5
MIC_AUD
white
audio from the microphone
6
AGND
blue
analogue ground
7
—
—
not connected
8
MIC_GPIO1
green
mute out
Figure 20.2
DTMF microphone to radio interface
Summary of Contents for TM8235
Page 1: ...TM8100 mobiles TM8200 mobiles Service Manual MMA 00005 04 Issue 4 June 2006...
Page 10: ...10 TM8100 TM8200 Service Manual Tait Electronics Limited June 2006...
Page 62: ...62 Description TM8100 TM8200 Service Manual Tait Electronics Limited June 2006...
Page 148: ...148 Disassembly and Reassembly TM8100 TM8200 Service Manual Tait Electronics Limited June 2006...
Page 162: ...162 Servicing Procedures TM8100 TM8200 Service Manual Tait Electronics Limited June 2006...
Page 178: ...178 Interface Fault Finding TM8100 TM8200 Service Manual Tait Electronics Limited June 2006...
Page 258: ...258 Receiver Fault Finding TM8100 TM8200 Service Manual Tait Electronics Limited June 2006...
Page 446: ...446 Spare Parts TM8100 TM8200 Service Manual Tait Electronics Limited June 2006...