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

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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
		Copyright © Huawei Technologies Co., Ltd.

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Contents Issue Date Hardware GuideNo Warranty About This Document HistoryVersion Date Chapter Descriptions CreationVersion Date Chapter Descriptions Specifications of the antenna interface Updated .8 Audio InterfaceUpdated -3 Recommended Contents Electrical and Reliability Features Introduction OverviewFeature Description Overall DescriptionAbout This Chapter Function OverviewDRX=2 DRX=5 DRX=9SMS Gprs Gprs ClassApplication Block Diagram Circuit Block Diagram2Circuit block diagram of the MG323 module B2B Connector Interface Description of the Application InterfacesPin Pin Name Description DC Characteristics Normal Min Tpy MaxReset TermonUART1DCD LedstatusPower Interface OverviewVIO VbatPin No Signal Name Description Vbat InterfaceGND Vcoin DCEVIO Interface Power-On and Power-Off Time SequenceVcoin Interface Pin for resetting the hardware Power-On Time SequencePin for controlling power-on and power-off Reset Signal Control InterfacePower-Off Time Sequence Input Signal Control Pins Pin for network status LEDWorking or Network Status Output Signal Control PinApplication Device Pin No Signal Name Description Feature Direction Uart InterfaceCircuit Recommended for the Uart Interface DCE receive DTE transmits DTE to DCE Data Serial dataDCE data DTE is ready DTE to DCE Terminal ready DCE data set DCE is ready DCE to DTE ReadyClock signal of the SIM card Power supply of the SIM cardData signal of the SIM card Reset signal of the SIM cardGround signal of the SIM card Circuit Recommended for the SIM Card Interface12External circuit for 32 Ω handsets/16 Ω headsets Audio Interface13External circuit for the microphone interface Antenna Installation Antenna InterfaceCoaxial Cable and RF Connector Environmental Type Material ConditionHuawei MG323 GSM M2M Module Hardware Guide Antenna Interface RF Specifications of the Antenna Interface Specification Minimum Typical Maximum Unit ValueESD Protection for the Antenna Interface Uplink frequency range GSM 824 849 MHzSpecification Minimum Typical Maximum Unit Value Specifications of the Antenna Interface Polarization Linear polarization Pattern OmnidirectionalElectrical and Reliability Features Symbol Specification Minimum Value Maximum Value UnitExternal power voltage Extreme Working ConditionsOperating and Storage Temperatures and Humidity Specification Minimum Value Maximum Value UnitPin No Signal Name Electrical Criteria of Application InterfacesFunction Signal Name Waveform Remarks Level Power supplyVoltage great drop. The Vbat power voltage Than 3.3Pins 41, 43, 45, 47, and 49 are power GND External Power pinVBAT=0 LedstatuUART1DSR UART1RTS UART1DTR UART1CTS UART1DCD UART1 UART1RDUART1RIN Power Supply Features Input Power SupplyWorking Current Parameter Minimum Value Typical Value Maximum Value UnitBand Typical Unit Working Mode Typical value Unit RemarkConfiguration Reliability Features Configuration ValueUp/1 Down 123 Test Condition StandardTest Condition Standard EN61000-4-2 ±4 kV ±8 kV ESD FeaturesESD Test Standard Contact Discharge Air Discharge Dimensions L x W x H 35 mm x 32.5 mm x 3.05 mm Mechanical SpecificationsDimensions Dimensions of the B2B Connector 1Dimensions of the MG323 module unit mmModel Stacking HRS Number Height mm MG323 Module Installation Description 5Structure fixing hole6MG323 module installation Specification Selection for Fasteners 7Machine screw dimensions8Nut dimensions Appendix a Circuits of Typical Interfaces 1Circuits of typical interfaces in the MG323 moduleAppendix B Acronyms and Abbreviations Acronym or Abbreviation ExpansionPbcch PCBPDU RTC

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