Tait TM9100 Service Manual

82 Circuit Descriptions TM9100 Service Manual
© Tait Electronics Limited August 2005
Power-Sense
Options
The radio allows the configuration of different power-sense options to
control how the radio is powered up and down:
■ battery power sense
■ auxiliary power sense (ignition sense)
■ internal-options power sense
■ no power sense
■ emergency power sense
The emergency power-sense option can be used in conjunction with any of
the other four options.
The different power-sense options have to be facilitated by hardware means,
as the software cannot act before it is powered up. The radio provides four
hardware links (LK1 to LK4) on the top-side of the main board which can
be configured to attain the power-sense option desired.
Figure 3.7 shows a block diagram of the hardware links LK1 to LK4.
The radio can be programmed to be either on, or to return to its previous
state when the power sense signal is removed. For information on
programming the power-on mode refer to the online help of the
programming software.
The
ON/OFF key can be used with any of the of the power-sense options to
turn the radio on and off.
Figure 3.7 Block diagram of hardware links LK1 to LK4
IOP GPIO7
13V8 BATT
LK2
Auxiliary Power
AUX GPI3
13.8V Battery
13V8 BATT
Power-up
Circuit
Sense (Ignition)
AUX GPI2
LK3
Emergency
Sense
LK4
Internal Options
Power Sense
ON/OFF Key
LK1
Power Sense

Tait TM9100 Specifications

General

Brand	Tait
Model	TM9100
Category	Radio
Language	English