Power Save; Controller Mode - Sony Ericsson GT47 Technical Description

6.4 Power Save

6.5 Controller Mode

LZT 123 7607 R1B
6. OPERATION
The GT47 can power down the main RS232 IC when not needed in order
to minimise power consumption. The IC is powered up automatically at
start-up but can be powered down by setting the output of IO2 on the
embedded GR47 (pin22) to low via AT command or embedded
application. Once powered down, the IC can be woken up by setting the
output of IO2 high on the GR47 via AT Command.
Even when powered down the IC is able to pass a DTR signal received on
the serial interface. Therefore an embedded application that monitors
DTR, while the IC is powered down, can be made to wake up the IC, if a
signal is received, by setting IO2 on the GR47 high.
The GT47, when powered up, will normally start up its GSM signalling
software and look to register on the GSM network. Any embedded
application script runs as a background process as and when the GSM
software is idle. As a feature available via embedded applications the GT47
can be placed in 'controller mode' whereby the GT47 powers up with a
minimal subset of radio functionality. The GSM signalling software is
halted and the embedded applications script has full control of the
processor.
Controller mode allows an application to run with more predictable
response times.
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