Motorola Mobility LLC T56KT1 User Manual

The G30 incorporates an optional low power mode, called Sleep Mode, in which it operates in 
minimum functionality, and therefore draws significantly less current. During low power mode 
the G30 network connection is not lost. G30 continues to monitor the GSM network constantly 
for any incoming calls or data.

During low power mode, all of the G30 interface signals are inactive and are kept in their 
previous state, prior to activating low power mode. To save power, all the G30 internal clocks and 
circuits are shut down, and therefore serial communications is limited.

By default, the G30 powers on in Idle mode. In this mode the G30 interfaces and features are 
functional and the module is fully active.

Low power mode is activated by the ATS24 command. The value set by this command 
determines the inactive state duration required by G30, in seconds, after which G30 will enter 
sleep mode.

For example:

ATS24 = 1 activates low power mode after 1 second of inactivity.
ATS24 = 5 activates low power mode after 5 seconds of inactivity.
ATS24 = 0 disables low power mode (default).

 illustrates the ATS24 command operation.

G30 will not enter low power mode in any case when there is data present on the 
serial interface or incoming from the GSM network or an internal system task is 
running. Only when processing of any external or internal system task has 
completed, and G30 is inactive for the duration of ATS24, it will enter low power 
mode.

During low power mode the G30 serial interfaces are disabled. This is indicated by the CTS 
signal high state.