Technical data

SYSTEM CONNECTOR INTERFACE
28
LZT 123 8020 R1A
Turning the Radio Device Off
Figure 5.3 Off timings and VIO performance
Symbol Parameters Conditions Min. Typ Max Unit
t
SPD
Time for software
pulse detection
which initiates a
software shutdown
800 - - ms
t
PULSE
Application
ON/OFF pulse
width
100
0
- - ms
t
SCSD
Software controlled
shutdown
deactivates VIO
(2)
-
)
2.5
)
10
(3)
s
)
t
OFF
Time when VCC
power supply can
be disabled
VIO is
DISABLED
0 - - ms
(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.