HUAWEI MU609 HSPA LGA Module
Application Guide
Sleeping and Waking Up Application Scenarios
Issue 02 (2013-09-18)
Huawei Proprietary and Confidential
Copyright © Huawei Technologies Co., Ltd.
80
Figure 10-3
SLEEP_STATUS output sequence
SLEEP_STATUS:
Module status:
Low level
Sleep State
High level
Operating state
10.3 Software Interfaces
10.3.1
Principle
The module runs on a multi-task software system. The sleep task is granted with the
lowest priority and assigned to detect whether the module can enter sleep mode.
Other tasks (such as the RF, SIM card, USB, and UART) have voting rights. They
vote to decide whether the module can enter sleep mode. When no other tasks are
running, the sleep task is executed. If the sleep task detects that all other tasks agree
on the module's sleep, the module enters sleep mode, as shown in Figure 10-4 . At
this time, the baseband chip reduces the work frequency, and the RF enters the
Discontinuous Reception (DRX) mode.
Figure 10-4
Currency state when the module is in sleep mode
T2(S EE
L
P)
T1(Wakeup)
For more information about the module's sleep procedure, see Figure 10-5 .
