User's Manual

GE910 Hardware User Guide
1vv0300962 Rev.12 2013-10-22
Reproduction forbidden without Telit Communications S.p.A. written authorization - All Rights Reserved
page 21 of 83
Mod. 0805 2011-07 Rev.2
4.2. Turning OFF the GE910
Turning OFF of the device can be done in two ways:
• via AT command (see GE910 Software User Guide, AT#SHDN)
• by tying low pin ON_OFF* for at least 2s
Either ways, the device issues a detach request to network informing that the device will not
be reachable any more.
To turn OFF the GE910 the pad ON-OFF* must be tied low for at least 2 seconds and then
released.
The same circuitry and timing for the power on must be used.
The device shuts down after the release of the ON-OFF* pad.
TIP:
To check if the device has been powered off, the hardware line PWRMON must be monitored.
The device is powered off when PWRMON goes low.
NOTE:
In order to avoid a back powering effect it is recommended to avoid having any HIGH logic
level signal applied to the digital pins of the GE910 when the module is powered off or during
an ON/OFF transition.