Huawei MG323 manual Uart Interface, Pin No Signal Name Description Feature Direction

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

Figure 3-7Driving circuit

3.6 UART Interface

3.6.1Overview

The MG323 module provides the UART1 (8-wire UART) interface for one asynchronous communication channel. As the UART1 interface supports signal control through standard modem handshake, AT commands are entered and serial communication is performed through the UART1 interface. The UART1 has the following features:

Full-duplex

Baud rate clock generated by the system clock

Direct memory access (DMA) transmission

Baud rate ranging from 9600 bit/s to 230400 bit/s (115200 bit/s by default)

Self-adapted baud rate ranging from 9600 bit/s to 115200 bit/s

Table 3-6lists the UART1 interface signals.

Table 3-6UART1 interface signals

Pin No.	Signal Name	Description	Feature	Direction

29	UART1_RD	DCE transmit	The data terminal	Data circuit-
		data	equipment (DTE)	terminating
			receives serial	equipment
			data.	(DCE) to DTE

	Issue 06 (2013-06-13)	Huawei Proprietary and Confidential	23
		Copyright © Huawei Technologies Co., Ltd.

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Contents Hardware Guide Issue DateNo Warranty Creation About This DocumentHistory Version Date Chapter DescriptionsVersion Date Chapter Descriptions Specifications of the antenna interface Updated .8 Audio InterfaceUpdated -3 Recommended Contents Electrical and Reliability Features Overview IntroductionFunction Overview Feature DescriptionOverall Description About This ChapterGprs Gprs Class DRX=2DRX=5 DRX=9 SMSCircuit Block Diagram Application Block Diagram2Circuit block diagram of the MG323 module Description of the Application Interfaces B2B Connector InterfaceMin Tpy Max Pin Pin Name Description DC Characteristics NormalLedstatus ResetTermon UART1DCDVbat Power InterfaceOverview VIODCE Pin No Signal Name DescriptionVbat Interface GND VcoinVIO 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 Pin for network status LED Input Signal Control PinsWorking or Network Status Output Signal Control PinApplication Device Uart Interface Pin No Signal Name Description Feature DirectionDCE data set DCE is ready DCE to DTE Ready Circuit Recommended for the Uart InterfaceDCE receive DTE transmits DTE to DCE Data Serial data DCE data DTE is ready DTE to DCE Terminal readyReset signal of the SIM card Clock signal of the SIM cardPower supply of the SIM card Data signal of the SIM cardCircuit Recommended for the SIM Card Interface Ground signal of the SIM cardAudio Interface 12External circuit for 32 Ω handsets/16 Ω headsets13External circuit for the microphone interface Antenna Interface Antenna InstallationEnvironmental Type Material Condition Coaxial Cable and RF ConnectorHuawei MG323 GSM M2M Module Hardware Guide Antenna Interface Uplink frequency range GSM 824 849 MHz RF Specifications of the Antenna InterfaceSpecification Minimum Typical Maximum Unit Value ESD Protection for the Antenna InterfaceSpecification Minimum Typical Maximum Unit Value Polarization Linear polarization Pattern Omnidirectional Specifications of the Antenna InterfaceExtreme Working Conditions Electrical and Reliability FeaturesSymbol Specification Minimum Value Maximum Value Unit External power voltageElectrical Criteria of Application Interfaces Operating and Storage Temperatures and HumiditySpecification Minimum Value Maximum Value Unit Pin No Signal NameThan 3.3 Function Signal Name Waveform Remarks LevelPower supply Voltage great drop. The Vbat power voltageLedstatu Pins 41, 43, 45, 47, and 49 are power GND ExternalPower pin VBAT=0UART1DSR UART1RTS UART1DTR UART1CTS UART1DCD UART1 UART1RDUART1RIN Parameter Minimum Value Typical Value Maximum Value Unit Power Supply FeaturesInput Power Supply Working CurrentBand Typical Unit Working Mode Typical value Unit RemarkConfiguration Test Condition Standard Reliability FeaturesConfiguration Value Up/1 Down 123Test 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 1Dimensions of the MG323 module unit mm Dimensions of the B2B ConnectorModel Stacking HRS Number Height mm 5Structure fixing hole MG323 Module Installation Description6MG323 module installation 7Machine screw dimensions Specification Selection for Fasteners8Nut dimensions 1Circuits of typical interfaces in the MG323 module Appendix a Circuits of Typical InterfacesAcronym or Abbreviation Expansion Appendix B Acronyms and AbbreviationsRTC PbcchPCB PDU

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