User's Manual

UL865-N3G Hardware User Guide
1VV0301177 Rev 2– 2015-04-20
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Reserved. Page 21 of 70
Mod. 0805 2011-07 Rev.2
5.2. Turning OFF the UL865-N3G V2
The following flow chart shows the proper turnoff procedure:
NOTE:
In order to prevent a back powering effect it is recommended to avoid having any HIGH
logic level signal applied to the digital pins of the UL865-N3G V2 when the module is
powered off or during an ON/OFF transition.
Modem OFF Proc.
AT#SYSHALT
Disconnect PWR supply
10s timeout
Modem ON Proc.
Delay 1.5s