矩阵键盘与液晶显示器外文文献翻译Word文件下载.docx

矩阵键盘与液晶显示器外文文献翻译Word文件下载.docx

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英文原文及中文译文）

文献出处：

CarlPoy

英文原文

THEDESIGNOFMATRIXKEYBOARDANDLCDDISPLAYBASEDONMCU

CarlPoy

Abstract

Thedevelopmentofmicroelectronicstechnologyandindustrialmeasurerequirementbringagoodopportunityfordevelopmentandresearchsystem,whichmakesitabroadprospects.Theequipmenthastheadvantagesofsmallsize,singlepowersupplyandavarietyofoutputvoltageleadsithasaspecialmodule.Throughtheanalysisofthehardwarestructure,wecansummarizeseachmoduleneeds.Forexample,weoftengothroughthekeystorealizethecontroloftheelectronicdevice.Smalltowatchmobilephone,totheTVcomputer,toavarietyofcomplexinstruments,allneedtorealizevariousoperationsthroughthebuttons.Thisdesignisanimportantpartofstepforthefurtherresearch,usingbuttonstocontrolthedisplay,includesomemoduleslikeLCD1602liquidcrystaldisplay,4*4matrixkeyboard,STC89C52single-chipmicrocomputerandotherchips.CombinewiththeProteussoftware,thesimulationresultsaredisplayedontheLCDin1602typeofdata.

KEYWORDS:

Single-chip;

LCD1602liquidcrystaldisplay;

4*4Matrixkeyboard

1Introduction

Withthedevelopmentofeconomyandtheprogressofscienceandtechnology,Microprocessorsandperipheralchipshavedevelopedrapidly.ThenewestdevelopmentoftheintegratedtechnologyistheCPUchipandexternal.Liketheprogrammemory,datamemory,parallel,serial,I/Otiming/counter,interruptcontrollerandothercontrolcomponentsareintegratedinachip—singlechip.SCM2hasamanufacturingprocessCMOS,Thesmallerlithographyprocessimprovesintegrationwhichmakethechipspacesmaller,lowercost,lowerworkingvoltage,lowerpowerconsumption.AdoptsdoubleCPUstructure,increasingthewidthofdatabus,improvethespeedandtheabilityofdataprocessing,apipelinestructure,improvetheprocessingandcomputingspeed,inordertomeettheneedsofreal-timecontrolandprocessing.Toincreasethestoragecapacity,theinternalEPROMEPPROM,secureprogram,toimprovethedrivingcapabilityofparallelport,inordertoreducetheperipheraldrivingchip,increasethelogicfunctionandcontroltheexternalI/Oportflexibility.Peripheralinserialmodebasedexpansion;

peripheralcircuitinternalinstallationisanobvioustrendtoconnecttheinternet.Reliabilityandapplicationlevelisgettinghigherandhigher.Somehigh-endmicrocontrollerandlaunchedinrecentyearsalsocontainsmanyspecialfunctionunit,SuchasA/Dconverter,modem,communicationcontroller,PLL,DMA,floatingpointunitetc.So,asweaddsomeexternalexpansionofthecircuitandchannelinterfaceitcanconstituteavarietyofcomputerapplications,suchasindustrialcontrolsystems,dataacquisitionsystem,automatictestsystem,intelligentinstrument,intelligentinterface,functionmoduleetc.WithMCUdevelopmentandcompletestructure,SCMhasbecomeapowerfultoolandwillhaveahigherlevelandbroaderdevelopment.

2Designofthewholestructureofsystem

Thisdesignisbasedonsingle-chip,includematrixkeyboardandLCDdisplaymodule.Single-chipisthefirstmodeltoselecttheappropriatetarget,function,reliability,cost,accuracyandspeedcontrolsystem.Accordingtotheactualsituationofthetopicselection,configurationmanagementmodeldifferentmainlyfromthefollowingtwoaspects:

First,supplychainmanagementhasstronganti-interferenceability;

second,SCMhasahigherprice.Forinformationinputmodule,keyboardselectioncanuseeconomicbenefitsandmeettherequirementsofthe4*4keymatrixkeyboardcanrealizemultifunctionkeyrequirements.Asfortheoutputmodule,usingLCD1602liquidcrystaldisplaymodule,liquidcrystaltoachievekeyinformationprocessingfunctionsaftertheshow.ThecircuitofthesystemisrequiredbyAT89C51chip,clockcircuit,resetcircuit,drivingcircuit,scanninglinedrivingcircuitandLCD1602LCDscreen.4*4matrixkeyboardaccessofP1.0—P1.7,LCD1602screentoaccessP0.0—P0.7.

3Systemhardwarecircuitdesign

3.1Liquidcrystalmodule

Theprincipleofliquidcrystaldisplayistheuseofphysicalpropertiesofliquidcrystal,Thedisplaycontrolareavoltage,powerisdisplayed,itcandisplaygraphics.Liquidcrystaldisplaywiththinthickness,suitableforlargescaleintegratedcircuitdirectlydriven,easytorealizefullcolordisplaycharacteristics,hasbeenwidelyusedinmanyfieldsofportablecomputer,digitalcamera,PDAmobilecommunicationtoolsetc.

1602liquidcrystalisalsocalledthe1602characterLCD,whichisaspecialusedtodisplayletters,numbers,symbolsoftheLCDmodule.Itiscomposedofapluralityof5X7or5X11dotmatrixcharactercomponents,eachdotmatrixcharacterwhocandisplayacharacter,thereisadistancebetweentheintervalofeach,thereareintervalsbetwee