最新版毕业设计英文文献51单片机中英文文献翻译Word文件下载.docx

最新版毕业设计英文文献51单片机中英文文献翻译Word文件下载.docx

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最新版毕业设计英文文献51单片机中英文文献翻译@#@AT89C51的概况@#@TheGeneralSituationofAT89C51@#@Chapter1TheapplicationofAT89C51@#@Microcontrollersareusedinamultitudeofcommercialapplicationssuchasmodems,motor-controlsystems,airconditionercontrolsystems,automotiveengineandamongothers.Thedomainsalsorequirethatthesemicrocontrollersarebeensuredbyarobusttestingprocessandapropertoolsenvironmentforthevalidationofthesemicrocontrollersbothatthecomponentandatthesystemlevel.IntelPlaformEngineeringdepartmentdevelopedanobject-orientedmulti-threadedtestenvironmentforthevalidationofitsAT89C51automotivemicrocontrollers.ThegoalsofthisenvironmentwasnotonlytoprovidearobusttestingenvironmentfortheAT89C51automotivemicrocontrollers,buttodevelopanenvironmentwhichcanbeeasilyextendedandreusedforthevalidationofseveralotherfuturemicrocontrollers.TheenvironmentwasdevelopedinconjunctionwithMicrosoftFoundationClasses（AT89C51）.Thepaperdescribesthedesignandmechanismofthistestenvironment,itsinteractionswithvarious@#@The8-bitAT89C51CHMOSmicrocontrollersaredesignedtoengine-controlsystems,airbags,suspensionsystems,andantilockbrakingsystems（ABS）.TheAT89C51isespeciallywellsuitedtoapplicationsthatbenefitfromitsprocessingspeedandenhancedon-chipperipheralfunctionsset,suchasautomotivepower-traincontrol,vehicledynamicsuspension,antilockbraking,andstabilitycontrolapplications.Becauseofthesecriticalapplications,themarketrequiresareliablecost-effectivecontrollerwithalowinterruptlatencyresponse,abilitytoservicetheintegratedperipheralsneededinrealtimeapplications,andaCPUwithaboveaverageprocessingpowerinasinglepackage.Thefinancialandlegalriskofthemarket,particularlyinmissioncriticalapplicationssuchasanautopilotoranti-lockbrakingsystem,mistakesarefinanciallyprohibitive.Redesigncostscanrunasflaw.Inaddition,fieldreplacementsofcomponentsisextremelyexpensive,asthedevicesaretypicallysealedinmoduleswithatotalvalueseveraltimesthatofthecomponent.Tomitigatetheseproblems,itisessentialthatcomprehensivetestingofthecontrollersbecarriedoutatboththecomponentlevelandsystemlevelunderworstcaseenvironmentalandvoltageconditions.Thiscompleteandthoroughvalidationnecessitatesnotonlyawell-definedprocessbutalsoaproperenvironmentandtoolstofacilitateandexecutethemissionsuccessfully.IntelChandlerPlatformEngineeringgroupprovidespostsiliconsystemvalidation（SV）ofvariousmicro-controllersandprocessors.Thesystemvalidationprocesscanbebrokenintothreemajorparts.Thetypeofthedeviceanditsapplicationrequirementsdeterminewhichtypesoftestingareperformedonthedevice.@#@1.2TheAT89C51providesthefollowingstandardfeatures:

@#@@#@4KbytesofFlash,128bytesofRAM,32IOlines,two16-bittimercounters,afivevectortwo-levelinterruptarchitecture,afulldupleser-ialport,on-chiposcillatorandclockcircuitry.Inaddition,theAT89C51isdesignedwithstaticlogicforoperationdowntozerofrequencyandsupportstwosoftwareselectablepowersavingmodes.TheIdleModestopstheCPUwhileallowingtheRAM,timercounters,serialportandinterruptsys-temtocontinuefunctioning.ThePower-downModesavestheRAMcontentsbutfreezestheoscil–latordisablingallotherchipfunctionsuntilthenextDescription@#@VCCSupplyvoltage.@#@GNDGround.@#@Port0：

@#@Port0isan8-bitopen-drainbi-directionalIOport.Asanoutputport,eachpincansinkeightTTLinputs.When1sarewrittentoport0pins,thepinscanbeusedasthismodeP0.Externalpullupsarerequiredduringprogramverification.@#@Port1：

@#@Port1isan8-bitbi-directionalIOportwithinternalpullups.ThePort1outputbufferscansinkso-urcefourTTLinputs.When1sarewrittentoPort1pinstheyarepulledbeusedasinputs.Asinputs,Port1pinsthatareexternallybeingpulledlowwillsourcecurrent（IIL）becauseoftheinternalpullups.Port1alsoreceivesthelow-orderaddressbytesduringFlashprogrammingandverification.@#@Port2：

@#@Port2isan8-bitbi-directionalIOportwithinternalpullups.ThePort2outputbufferscansinksourcefourTTLinputs.When1sarewrittentoPort2pinstheyarepulledbeusedasinputs.Asinputs,Port2pinsthatareexternallybeingpulledlowwillsourcecurrent（IIL）becauseoftheinternalpullups.Port2emitsthethisapplication,itusesstronginternalpull-upswhenemitting1s.Duringaccessestoexternaldatamemorythatuse8-bitaddresses（MOVX@RI）,Port2emitsthecontentsoftheP2SpecialFunctionRegister.Port2alsoreceivestheFlashprogrammingandverification.@#@Port3：

@#@Port3isan8-bitbi-directionalIOportwithinternalpullups.ThePort3outputbufferscansinksou-rcefourTTLinputs.When1sarewrittentoPort3p