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
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.
5
AUX GPI2
4
AUX GPI3
General purpose input (ignition sense) 3.3V levels. Protected for
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
2
AUX GPIO5
9
AUX GPIO6
1
AUX GPIO7
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%