Terminating Sleep Mode - Fibocom G610 Hardware User Manual

calls or data. After this short paging is completed, G610 returns to sleep mode. During this short
awake period, the serial interfaces are enabled and communications with the module is possible.
The CTS_N signal is alternately enabled and disabled synchronously with the network paging
cycle. CTS_N is enabled whenever G610 awakes to page the network. The period based on the
DRX parameter of the network.
4.615 ms (TDMA frame duration) * 51 (number of frames) * DRX value.
At the same time, the CTS_N indicates the G610 serial interfaces are active or inactive.
CTS
(DRX=2)

3.5.3 Terminating Sleep Mode

Terminating the Sleep mode, or wake-up, is defined as the transition of the G610 operating
state from Sleep mode to Idle mode. There are several ways to wake-up G610 from Sleep mode as
described below.
Important:
minimize power consumption. When terminating the Sleep mode, and switching to Idle mode, G610
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, and is also indicated by the CTS_N signal inactive
(high) state. 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 G610 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 others are initiated by the system.
G610 GPRS Module Hardware User Manual
During Sleep mode the G610 internal clocks and circuits are disabled, in order to
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