TM9100 Mobiles: 110 W Mobile Installation Guide Installing the Radio 19
© Tait Electronics Limited October 2005
Emergency Switch The radio allows for connection of an emergency switch to any input line
to enter the emergency mode. If the switch is connected to the AUX GPI2
input line, the radio can also use ‘emergency power sense’ to power up the
radio to enter the emergency mode.
Note The selected input line must be programmed to ‘Enter Emergency
Mode’ and active to ‘Low’. To use ‘emergency power sense’,
hardware link LK3 must be fitted (factory default), and AUX GPI2
Table 4.2 Auxiliary connector (radio)—pins and signals
Pinout Pin Signal name Description Signal type
12 AUX GPI1
1
1. Used by the 100W RF amplifier
General purpose digital
input. Programmable
function
Digital,
3V3 CMOS.
5 AUX GPI2
4 AUX GPI3 General purpose input
(ignition sense)
3V3 levels.
Protected for
+13.8V.
10 AUX GPIO4 Programmable function and
direction
Pads available to fit a higher
power driver transistor on
GPIO4 line
Digital, 3V3
CMOS input;
open collector
output with
pullup
2 AUX GPIO5
1
9 AUX GPIO6
1
1 AUX GPIO7
1
11 AUX TXD Asynchronous serial port -
Transmit data
Digital,
3V3 CMOS
3 AUX RXD Asynchronous serial port -
Receive data
Digital,
3V3 CMOS
7 AUD TAP IN Programmable tap point into
the Rx or Tx audio chain.
DC-coupled
Analog
13 AUD TAP OUT Programmable tap point out
of the Rx or Tx audio chain.
DC-coupled
Analog
14 AUX MIC AUD Auxiliary microphone input.
Electret microphone biasing
provided. Dynamic
microphones are not
supported
Analog
6 RSSI Analog RSSI output Analog
8 +13V8 SW Switched 13.8V supply.
Supply is switched off when
radio body is switched off
Power
15 AGND Analog ground Ground
rear view
J
B
C
D
E
F
G
H
I
1)
1!
1@
1#
1$
1%