User's Manual

GL865 Hardware User Guide

1vv0300910 Rev.1 – 2011-07-22

page 19 of 79

5.2. Turning OFF the GL865

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, any 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 any of both OFF procedure will be applied, the AT#SYSHALT

AT command must be send (see AT Commands Reference Guide,

80000ST10025a), after the OK response message, check the

V_AUX /

PWRMON

pin, when the logic level is low 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: