HUAWEI MU739 HSPA+ LGA Module
Hardware Guide
Description of the Application Interfaces
Issue 01 (2011-08-24)
Huawei Proprietary and Confidential
Copyright © Huawei Technologies Co., Ltd.
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MU739 doesn’t support hardware shut down, can only be powered off by software.
WAKEUP_IN Signal
The AP controls the sleep and wakeup status of the MU739 module through the
WAKEUP_IN signal.
If there is no external WAKEUP_IN signal, the wireless module keeps in the wakeup
status by default. After receiving the WAKEUP_IN signal, the wireless module
determines whether to enter the sleep mode according to the level status of the
WAKEUP_IN signal.
Table 3-3 shows the definition of the WAKEUP_IN signal.
3.4.3
Output Signal Control Pins
The MU739 module provides two LED controlling signals: LED_STATUS and
LED_MODE.
Different blinking modes of the status LED indicate different network status. Table 3-5
describes the status of the LED_STATUS pin and LED_MODE pin.
Table 3-5
List of the LED_STATUS pin and LED_MODE pin
No. Operating Status
LED_STATUS
LED_MODE
1
The 3G network is
successfully registered.
The indicator blinks
once each time.
Light off
2
The dial-up connection is
set up for accessing 3G
data services.
Light on
Light off
3
The software is being
downloaded or upgraded.
Light off
The indicator blinks fast.
4
The network is being
searched for or no
network is detected.
Light off
The indicator blinks
twice each time.
5
The 2G network is
successfully registered.
Light off
The indicator blinks
once each time.
6
The dial-up connection is
set up for accessing 2G
data services.
Light off
Light on
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