User's Manual

CL865-DUAL Hardware User Guide
1vv0301104 Rev.1 – 2014-03-07
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Reserved. Page 20 of 70
Mod. 0805 2011-07 Rev.2
5.2. Turning OFF the CL865
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), 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.