Huawei MG323 manual Signal Control Interface, Power-Off Time Sequence, Reset, Overview

HUAWEI MG323 GSM M2M Module
Hardware Guide	Description of the Application Interfaces

Fetch Ext Code in the figure is a file system in the MG323 module.

Before powering on the MG323, make sure that TERM_ON is in High-Z condition.

3.4.3Power-Off Time Sequence

The MG323 module supports power-off through the TERM_ON interface or the AT^SMSO command. Figure 3-5shows the power-off time sequence.

Figure 3-5Power-off time sequence

The processing of the power-off event depends on the normal stop time of the file system in the MG323 module. The processing varies with the capacity of the file system.

Do not suddenly turn off the VBAT power when the module is working. It is recommended to power-off the module before turning off the VBAT power.

3.4.4RESET

The MG323 module supports hardware reset function. If the software of the MG323 module stops responding, you can reset the hardware through the RESET signal. After the hardware is reset, the software starts powering on the module and reports relevant information according to the actual settings. For example, the AT command automatically reports ^SYSSTART. In this case, the external VIO interface is enabled and supplies 2.8 V power.

3.5 Signal Control Interface

3.5.1Overview

The signal control part of the B2B interface in the MG323 module consists of:

Power-on/off (TERM_ON) pin

Hardware reset (RESET) pin

Issue 06 (2013-06-13)	Huawei Proprietary and Confidential	20
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