Circuit Recommended for the Uart Interface | Huawei MG323 guide

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

	Pin No.	Signal Name	Description	Feature	Direction

	33	UART1_TD	DCE receive	The DTE transmits	DTE to DCE
			data	serial data.

	38	UART1_RING	DCE ring	The DCE notifies	DCE to DTE
			indicator	the DTE of a
				remote call.

	32	UART1_DTR	DCE data	The DTE is ready.	DTE to DCE
			terminal ready

	34	UART1_RTS	DCE request to	The DTE requests	DTE to DCE
			send	the DCE to send
				data.

	36	UART1_DSR	DCE data set	The DCE is ready.	DCE to DTE
			ready

	28	UART1_CTS	DCE clear to	The DCE has	DCE to DTE
			send	switched to the
				data receiving
				mode.

	24	UART1_DCD	DCE data	A data link is set	DCE to DTE
			carrier detect	up.

3.6.2Circuit Recommended for the UART Interface

Figure 3-8shows the connection of the UART1 interface in the MG323 module (DCE) with the host (DTE).

Figure 3-8Connection of the UART1 interface in the MG323 module (DCE) with the host (DTE)

When an MG323 module receives an SM (Short Message), a low-level signal is output through the RING (pin 38) for 1s, as shown in Figure 3-9 .

	Issue 06 (2013-06-13)	Huawei Proprietary and Confidential	24
		Copyright © Huawei Technologies Co., Ltd.

Image 24

Huawei MG323 manual Circuit Recommended for the Uart Interface, DCE receive DTE transmits DTE to DCE Data Serial data

Contents

Issue Date Hardware Guide No Warranty About This Document HistoryVersion Date Chapter Descriptions Creation Version Date Chapter Descriptions Updated .8 Audio Interface Updated -3 RecommendedSpecifications of the antenna interface Contents Electrical and Reliability Features Introduction Overview Feature Description Overall DescriptionAbout This Chapter Function Overview DRX=2 DRX=5 DRX=9SMS Gprs Gprs Class Application Block Diagram Circuit Block Diagram 2Circuit block diagram of the MG323 module B2B Connector Interface Description of the Application Interfaces Pin Pin Name Description DC Characteristics Normal Min Tpy Max Reset TermonUART1DCD Ledstatus Power Interface OverviewVIO Vbat Pin No Signal Name Description Vbat InterfaceGND Vcoin DCE Power-On and Power-Off Time Sequence Vcoin InterfaceVIO Interface Power-On Time Sequence Pin for controlling power-on and power-offPin for resetting the hardware Signal Control Interface Power-Off Time SequenceReset Input Signal Control Pins Pin for network status LED Output Signal Control Pin Application DeviceWorking or Network Status Pin No Signal Name Description Feature Direction Uart Interface Circuit 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 Ready Clock signal of the SIM card Power supply of the SIM cardData signal of the SIM card Reset signal of the SIM card Ground signal of the SIM card Circuit Recommended for the SIM Card Interface 12External circuit for 32 Ω handsets/16 Ω headsets Audio Interface 13External circuit for the microphone interface Antenna Installation Antenna Interface Coaxial Cable and RF Connector Environmental Type Material Condition Huawei 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 MHz Specification Minimum Typical Maximum Unit Value Specifications of the Antenna Interface Polarization Linear polarization Pattern Omnidirectional Electrical and Reliability Features Symbol Specification Minimum Value Maximum Value UnitExternal power voltage Extreme Working Conditions Operating and Storage Temperatures and Humidity Specification Minimum Value Maximum Value UnitPin No Signal Name Electrical Criteria of Application Interfaces Function Signal Name Waveform Remarks Level Power supplyVoltage great drop. The Vbat power voltage Than 3.3 Pins 41, 43, 45, 47, and 49 are power GND External Power pinVBAT=0 Ledstatu UART1 UART1RD UART1RINUART1DSR UART1RTS UART1DTR UART1CTS UART1DCD Power Supply Features Input Power SupplyWorking Current Parameter Minimum Value Typical Value Maximum Value Unit Working Mode Typical value Unit Remark ConfigurationBand Typical Unit Reliability Features Configuration ValueUp/1 Down 123 Test Condition Standard Test Condition Standard ESD Features ESD Test Standard Contact Discharge Air DischargeEN61000-4-2 ±4 kV ±8 kV Mechanical Specifications DimensionsDimensions L x W x H 35 mm x 32.5 mm x 3.05 mm Dimensions of the B2B Connector 1Dimensions of the MG323 module unit mm Model Stacking HRS Number Height mm MG323 Module Installation Description 5Structure fixing hole 6MG323 module installation Specification Selection for Fasteners 7Machine screw dimensions 8Nut dimensions Appendix a Circuits of Typical Interfaces 1Circuits of typical interfaces in the MG323 module Appendix B Acronyms and Abbreviations Acronym or Abbreviation Expansion Pbcch PCBPDU RTC