Sony Ericsson GR47/GR48 - Manual (Page 78)

14. USING THE DEVELOPER’S KIT
78
LZT 123 7589 R1A
14.4 Switches
All switches are mounted on the front panel of the developer’s box.
Switch Default Description
Vcc
(SW1)
N/C This switch chooses the voltage source that the radio
device will use. The default state N/C makes the
voltage path to the radio device open circuit.
Choosing INT connects the internal +3.6V DC supply
to the VCC pins of the radio device. Choosing EXT
connects the external +3.6V DC supply to the VCC
pins of the radio device.
Note: The external +3.6V DC supply is a user provided
source through the EXT VCC connector.
ON/OFF
(SW2)
- This is a momentary push-button switch to enable the
user to manually turn the module on and off. The
radio device is turned on by pressing and holding the
ON/OFF switch for at least 1 second before
releasing.The radio device is turned off by pressing
and holding the ON/OFF switch for at least 2 second
before releasing. The module will detect the OFF
request and the software will perform all the
necessary shutdown tasks (e.g. SIM power
management and network detach) before the VIO
LED is extinguished.
Note: In the event of the radio device locking up and
being unrecoverable under software control, the ON/
OFF switch provides an alternative HARD SHUTDOWN
control. To initiate the HARD SHUTDOWN feature press
and hold the ON/OFF switch for at least 10 seconds or
until the module powers down and VIO LED is no
longer illuminated.