Activating Sleep Mode; Serial Interface During Sleep Mode - Fibocom G610 Hardware User Manual

G610 interface signals are inactive and are kept in their previous state, prior to activating low power
mode. To save power, all the G610 internal clocks and circuits are shut down, and therefore serial
communications is limited.
The CTS_N signal is alternately enabled (LOW level) and disabled (HIGH level) synchronously
with Sleep Mode and Idle mode. At the same time this indicates the G610 serial interfaces are
active.
Important:
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, G610 will enter Sleep mode
according to the ATS24 command settings.
Important:
command.

3.5.1 Activating Sleep Mode

By default, the G610 powers on in Idle Mode. The ATS24 default is 0. In this mode the G610
interfaces and features are functional and the module is fully active. Sleep mode is activated by the
ATS24 command. Such as ATS24 would be activated Sleep mode at soon.
CTS
RXD

3.5.2 Serial Interface during Sleep Mode

The G610 wakes up periodically from Sleep mode to page the GSM network for any incoming
G610 GPRS Module Hardware User Manual
G610 will not enter Sleep mode in any case when there is data present on the
All of the description about CTS_N, it must be set the UART to HW control by AT
ATS24=1 return OK
HIGH: disable, Sleep Mode
LOW: enable, Idle Mode
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