Serial Interface During Sleep Mode; Terminating Sleep Mode - Fibocom G510 Hardware User Manual

Figure 3- 5 ats24=2, set module to sleep Mode after 2s
Note: In sleep mode, AVDD voltage switches to low power consumption mode, subsequent sleep status
can be referenced by this pin. AVDD is the internal signal of the module.

3.5.2 Serial Interface during Sleep Mode

The module wakes up periodically from Sleep mode to page the GSM network for any incoming calls or
data. After this short paging is completed, module returns to sleep mode. In the Sleep Mode, the UART is
limited.

3.5.3 Terminating Sleep Mode

Terminating the Sleep mode, or wake-up, is defined as the transition of the module operating state from
Sleep mode to Idle mode. There are several ways to wake-up module from Sleep mode as described
below.
During Sleep mode the G510 internal clocks and circuits are disabled, in order to minimize power
consumption. When terminating the Sleep mode, and switching to Idle mode, nG510 requires a minimal
delay time to reactivate and stabilize its internal circuits before it can respond to application data. This
delay is typically of 5 ms. The delay guarantees that data on the serial interface is not lost or
misinterpreted.
3.5.3.1 Temporary Termination of Low Power Mode
Temporary termination of Sleep mode occurs when module switches from Sleep mode to Idle mode for a
defined period, and then returns automatically to Sleep mode.
Low power mode may be terminated temporarily by several sources, some of which are user initiated and
G510 Hardware User Manual Page 19 of 42