34 Installing the Radio TM9300/TM9400 Installation Guide
© Tait Limited December 2015
The space for a mating plug is limited to 1 5/8 inch (41mm) in width
and 11/16 inch (18 mm) in height. Although most plugs will fit this
space, it is recommended that you test the plug to be used before man-
ufacturing a cable.
Some input levels of the auxiliary connector depend on how the internal
hardware links are fitted (refer to Table 4.3). For more information on
hardware links refer to “Power Sense Options” on page 19.
Table 4.2 Auxiliary connector (radio) - pins and signals
Pinout Pin Signal name Description Signal type
12 AUX GPI1 General purpose digital input.
Programmable function
Digital, 3.3V CMOS.
5AUXGPI2
4 AUX GPI3 General purpose input (ignition sense) 3.3V levels. Protected for
+13.8V (refer to Table 4.3).
10 AUX GPIO4 Programmable function and direction
Pads available to fit a higher power
driver transistor on GPIO4 line
Digital, 3.3V CMOS input;
open collector output with
pullup
2AUXGPIO5
9AUXGPIO6
1AUXGPIO7
11 AUX TXD Asynchronous serial port -
Transmit data
Digital, 3.3V CMOS
3 AUX RXD Asynchronous serial port -
Receive data
Digital, 3.3V CMOS
7 AUD TAP IN Programmable tap point into the Rx or
Tx audio chain. DC-coupled
Analog
13 AUD TAP OU
T
Programmable tap point out of the Rx
or Tx audio chain. DC-coupled
Analog
14 AUX MIC AU
D
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%
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