GL865 Hardware User Guide
1vv0300910 Rev.1 – 2011-07-22
Reproduction forbidden without Telit Communications S.p.A. written authorization - All Rights Reserved
page 20 of 79
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 GL865 when the module is powered OFF or during an
ON/OFF transition.
Modem OFF
Proc.
PWRMON = OFF?
Place AT command
AT#SYSHALT
N
Disconnect PWR
supply
Y
Disconnect PWR
supply
Wait
PWRMON =OFF
or
15s timeout
Modem ON
Proc.
Delay 1.5s