MCUdevelopmentandapplicationstatusInthisKeywords:asingle-chipmicrocomputer,development,applicationChinastartedtouseMCUisin1982,justfiveyearsveryquickly.Thecurrentworldeachbigchipmanufacturingcompanieshavelaunchedtheirownmicrocontroller,from8bits,16to32bits,etc,buttheyhavetheirspecialfeatures,complementarytoeachother,fortheapplicationofthesinglechipmicrocomputerprovidevastheavenandearth.Singlechipmicrocomputer,alsocalledasingle-chipmicrocomputerorsinglechipcomputer.Itisthecentralprocessingunit(CPU),randomaccessmemory(RAM),readonlymemory(ROM),input/outputport(I/0)andothermajorcomputerfunctionscomponentsareintegratedintoapieceofintegratedcircuitchipmicrocomputer.MCUdevelopmentandapplicationstatusAbstractKeyWords:MCU,development,applicationStudyonMCS5IMieroController’sReverseAnatomizationandToDownDesignAbstraetTheworldwideeleetroniesindustry15raPidlymovingforwardovethePastdeeades.Assilieonteehnologyhaserossedthedeesubmieronthreshold,eeandesigntensofmillionsoftransistorsonsingleehiP.That15tosaysemieonduetorhasenteredintotherealm“SystemonaChip(SoC)”.TheresearehontheteehnoloofIpeordesign15eoneernedbybothresearehsoeietyandindustryworl.BeeauseofthewideuseofMCS51MieroControllerandtheimPortanmeaningofMCUeoredesign,westudyonMCS51reverseanatomiztionandToPDownDesignThegoalofthisartiele15todesignaMCS51MieroControllerehiTheMainworkandaehievementsareasfollows.EyerecordedInthisIABSTRACTII1.Thesinglechipmicrocomputerprofile21.1.Microcomputerinthepopularityofourcountry................21.2.Thestructureofthesinglechipmicrocomputer................22.MCUdevelopment42.1.Singlechipmicrocomputerlonglife.........42.2.8bits,16,32-bitSCMcommondevelopment................42.3.Singlechipmicrocomputerfaster................42.4.Lowvoltageandlowpowerconsumption................53.Thereliabilityofthemicrocomputerapplicationtechnology53.1.EFT(ELLECTRICALFASTTRANSIENT)technology...53.2.Lownoisewiringtechnologyanddrivetechnology...53.3.Thelowfrequencyclock......64.MCUdevelopment64.1.LowpowerconsumptionCOSMchange.........64.2.Miniaturemonolithicchange................64.3.Themainstreamandmanyvarietiescoexistence................74.4.Largecapacityandhighperformance................74.5.Theserialextensiontechniques................7Reference81.Thesinglechipmicrocomputerprofile1.1.MicrocomputerinthepopularityofourcountryChinastartedtouseMCUisin1982,justfiveyearsveryquickly.InShanghaiin1986tothefirstsinglechiphasheldanationaldevelopmentandapplicationofexchange,andinsomeareashasalsoestablishedthesinglechipcomputerapplicationassociation,thatistheformationofthefirstwave.Bynow,microcomputerapplicationtechnologyrapiddevelopment,theInternetweenterasinglechipsearch,willseethousandsofsinglechipmicrocomputerwebsiteintroduced,notincludingforeign.Anditscorrespondingprofessionalmagazinenowalsohasalotof,forexamplebysingle-chipmicrocomputer,theauthorityoftheworldHeLiMinthesingle-chipmicrocomputerandembeddedsystemapplicationmagazinenowispopularelectronicindustry,inJuly2003,91student.CominShanghai,guangzhouandBeijingandthebigcitiesdoaprofessionalpersonnelneedsreport,thesinglechipmicrocomputertalentwasfirstdemand.1.2.ThestructureofthesinglechipmicrocomputerSinglechipmicrocomputer,alsocalledasingle-chipmicrocomputerorsinglechipcomputer.Itisthecentralprocessingunit(CPU),randomaccessmemory(RAM),readonlymemory(ROM),input/outputport(I/0)andothermajorcomputerfunctionscomponentsareintegratedintoapieceofintegratedcircuitchipmicrocomputer.Webytheshrewdarecalculatedanarithmeticproblem.Example:36+163x156-166÷34.Nowtooperations,firstneedsanabacus,followedbythepaperandpen.Weputthequestiontocountdown,andthenthefirststepwastobe163x156,with36totalsumofthewritteninthepaper,andthenthe166÷34,andputitintheresultfromthelastminus,getthefinalresults.Now,weusethesinglechipmicrocomputertocompletetheaboveprocess,obviously,itmustfirsthaveinsteadofabacusoperationsparts,itisalogic;Next,wanttohavecanplaythepaperandpenintheroleofthedevice,whichcanmemoryoriginaltitle,rawdataandintermediateresult,alsorememberthatmakeSCMcanautomaticoperationandtheestablishmentofcommand.ThiskindofdeviceiscalledCunZhuQi.Inaddition,stillneedtohaveeffectofthecontrollercantaketheplaceofpeople,itcanaccordingtothecommandofthegiveninadvancesendallcontrolsignal,makethewholecalculationprocesscanstepbystep.Butlightthesethreepartisnotenough,theoriginaldatawithorderstoinput,theresultsofthecalculationtooutput,allneedintheorder,sometimesneedtowait.Asanexample,thecalculationin163x156,digitalandcannotatthesametimeintotheunit.Becausethisneedstobesetupinthesingleaccordingtothecommandofthecontrollerforactiondoor,whentheunitneed,letnewdatainto.Or,togetthelastresultswhenunit,thentheoutput,butamongtheresultscan'tliterallyslipoutofthesinglechipmicrocomputer.ThiskindofinputandoutputdataofcertainmanagementdoorcircuitintheSCMcalledthemouth(Port).IntheSCM,therearebasicallythreetypesofinformationflowin,onekindisdata-allkindsofrawdata(asanexampleofthe36,163,,etc.),intermediateresults(suchas166÷34incomecommercial4,suchasaremnant30),program(commandset),e