GL865-DUAL V3 Hardware User Guide
1vv0301018 Rev.5 – 2013-08-05
Reproduction forbidden without written authorization from Telit Communications S.p.A. - All Rights Reserved.
Page 20 of 76
Mod. 0805 2011-07 Rev.2
5.2.
Turning OFF the GL865-DUAL V3
Turning off of the device can be done in two ways:
•
General turn OFF
•
Processor turn OFF
General turn OFF
– disconnect the power supply from the both power pins VBATT and
VBATT_PA at the same time. In this case all parts of the module are in OFF condition, no
power consumption is present.
Processor turn OFF
– disconnect the power supply only from the power pin VBATT, the
power pin VBATT_PA can be connected to power supply, in this case a low, about 30uA,
power consumption is present
Before either of both OFF procedures is applied, the AT#SYSHALT AT command must be
sent (see AT Commands Reference Guide, 80000ST10025a), after the OK response message,
wait for 10 seconds, then the module can be consider fully not operating and at this moment is
possible disconnect the Power Supply.
The following flow chart shows the proper turnoff procedure:
Modem OFF
Proc.
AT#SYSHALT
Disconnect PWR
supply
10s timeout
Modem ON Proc
.
Delay 1.5s