User's Manual

page 39/51
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User Manual 2012/06/28
Figure 25: Diagram for the sleep mode
Ksleep = 1 OR
( Ksleep = 0
AND
DTR = High)
Module is ready to
receive and send AT
VGPIO remains at 2.8V
RI signal
connected
and
programmed?
Module is in
sleep m
Sleep mode request
Delay to enter the sleep
mode
CTS is High
The wakes up
periods are set by
the network DRX
or the OS
DTE could
also
be in sleep
mode
Wake up incoming event such as:
• Network event.
• Alarm interruption.
• DTR interruption.
• RTS interruption.
RI wakes the DTE
DTE is in idle mode