Integrator's Manual GR47/GR48

14. USING THE DEVELOPER’S KIT

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.