Tait TM9100 Service Manual

40 Description TM9100 Service Manual
© Tait Electronics Limited August 2005
2.3.6 Control-Head Connectors
The control-head loom connects the connector on the front of the radio
body to the connector on the rear of the control head.
The connector on the front of the radio body is an 18-way two-row right-
angled IDC (insulation displacement connector) SMD header socket.
The connector on the rear of the control head is an 18-way 0.1 inch pitch
Micro-MaTch SMD socket.
Table 2.5 Control-head connectors – pins and signals
Pinout Pin Signal Description Signal type
1 RX_AUD Receive audio output. Post volume
control. AC-coupled.
Analog
2+13V8
a
Power supply output from radio body
power source.
Power
3 CH_TXD Asynchronous serial port -
Transmit data.
Digital. 3V3 CMOS.
4 CH_PTT PTT input from microphone.
Also carries the hookswitch signal.
Digital
5 CH_MIC_AUD Fist microphone audio input. Analog
6 AGND Analog ground. Ground
7 CH_RXD Asynchronous serial port - Receive data. Digital. 3V3 CMOS.
8 DGND Digital ground. Ground
9 CH_ON_OFF Hardware power on/software-
controlled power off input. Active low.
Digital
10 VOL_WIP_DC DC signal from volume pot wiper
(not used, connected to AGND).
Analog
11 CH_SPI_DO Data output signal to control head. Digital. 3V3 CMOS.
12 CH_LE Latch enable output to control head. Digital. 3V3 CMOS.
13 CH_GPIO1 General purpose digital input/output. Digital. 3V3 CMOS
input.
Open collector
output with pullup.
14 +3V3 Power supply to control head digital
circuits.
Power
15 CH_SPI_DI Data input from control head. Digital. 3V3 CMOS.
16 CH_SPI_CLK Clock output to control head. Digital. 3V3 CMOS.
17 SPK– Speaker audio output for non-remote
control head. Balanced load
configuration.
Analog
18 SPK+ Speaker audio output for non-remote
control head. Balanced load
configuration.
Analog
a. Can be switched or unswitched. For more information refer to “Connector Power Supply Options” on page 85.
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front view
of radio body
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top view of
control-head
board

Tait TM9100 Specifications

General

Brand	Tait
Model	TM9100
Category	Radio
Language	English