Interface Specification - Tait TM8100 mobiles Service Manual

20.4

Interface Specification

Figure 20.2 DTMF microphone to radio interface
TM8100/TM8200 Service Manual
© Tait Electronics Limited November 2007
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
1
2
3
4
5
6
7
8
.
Signal Colour
— —
13V8_SW red
— yellow
MIC_PTT black
MIC_AUD white
AGND blue
— —
MIC_GPIO1 green
TMAA02-02 DTMF Microphone
Description
not connected
power supply (switched)
not connected
PTT and hookswitch
audio from the microphone
analogue ground
not connected
mute out
509