Sony Ericsson GR47 Integrator's Manual page 29

Turning the Radio Device Off
LZT 123 7589 R2B
SYSTEM CONNECTOR INTERFACE
Figure 5.3 Off timings and VIO performance
Symbol Parameters
t Time for software
SPD
pulse detection
which initiates a
software shutdown
t
Application
PULSE
ON/OFF pulse
width
t Software controlled
SCSD
shutdown
deactivates VIO
t
Time when VCC
OFF
power supply can
be disabled
(2) It is a requirement from most GSM network providers that GSM products
properly detach from the network during a power-down sequence. In order
to achieve this it is important that the VCC supply is not removed or turned off
before VIO has been deactivated by the module.
Conditions
(2)
VIO is
DISABLED
Min. Typ Max Unit
800 - - ms
100 - - ms
0
) ) (3)
- 2.5 10 s
0 - - ms
)
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