AT89S52单片机 外文文献 英文文献 外文翻译中英对照Word格式.docx

AT89S52单片机 外文文献 英文文献 外文翻译中英对照Word格式.docx

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AT89S52FeaturesCompatiblewithMCS-51Products8KBytesofIn-SystemProgrammable（ISP）FlashMemory一Endurance:

@#@10,000Write/EraseCycles4.0Vto5.5VOperatingRangeFullyStaticOperation:

@#@0Hzto33MHzThree-levelProgramMemoryLock256x8-bitInternalRAM32ProgrammableI/OLinesThree16-bitTimer/CountersEightInterruptSourcesFullDuplexUARTSerialChannelLow-powerIdleandPower-downModesInterruptRecoveryfromPower-downModeWatchdogTimerDualDataPointerPower-offFlagFastProgrammingTimeFlexibleISPProgramming（ByteandPageMode）Green（Pb/Halide-free）PackagingOption1.DescriptionTheAT89S52isalow-power,high-performanceCMOS8-bitmicrocontrollerwith8Kbytesofin-systemprogrammableFlashmemory.ThedeviceismanufacturedusingAtmeFshigh-densitynonvolatilememorytechnologyandiscompatiblewiththeindus-try-standard80C51instructionsetandpinout.Theon-chipFlashallowstheprogrammemorytobereprogrammedin-systemorbyaconventionalnonvolatilememorypro-grammer.Bycombiningaversatile8-bitCPUwithin-systemprogrammableFlashonamonolithicchip,theAtmelAT89S52isapowerfulmicrocontrollerwhichprovidesahighly-flexibleandcost-effectivesolutiontomanyembeddedcontrolapplications.TheAT89S52providesthefollowingstandardfeatures:

@#@8KbytesofFlash,256bytesofRAM,32I/Olines,Watchdogtimer,twodatapointers,three16-bittimer/counters,asix-vectortwo-levelinterruptarchitecture,afullduplexserialport,on-chiposcillator,andclockcircuitry.Inaddition,theAT89S52isdesignedwithstaticlogicforoperationdowntozerofrequencyandsupportstwosoftwareselectablepowersavingmodes.TheIdleModestopstheCPUwhileallowingtheRAM,timer/counters,serialport,andinterruptsystemtocontinuefunctioning.ThePower-downmodesavestheRAMcon-tentsbutfreezestheoscillator,disablingallotherchipfunctionsuntilthenextinterruptorhardwarereset.2.PinDescriptionVCC:

@#@Supplyvoltage.GND:

@#@Ground.Port0：

@#@Port0isan8-bitopendrainbidirectionalI/Oport.Asanoutputport,eachpincansinkeightTTLinputs.WhenIsarewrittentoport0pins,thepinscanbeusedashigh-impedanceinputs.Port0canalsobeconfiguredtobethemultiplexedlow-orderaddress/databusduringaccessestoexternalprogramanddatamemory.Inthismode,P0hasinternalpull-ups.Port0alsoreceivesthecodebytesduringFlashprogrammingandoutputsthecodebytesdur-ingprogramverification.Externalpull-upsarerequiredduringprogramverification.Port1：

@#@Port1isan8-bitbidirectionalI/Oportwithinternalpull-ups.ThePort1outputbufferscansink/sourcefourTTLinputs.WhenIsarewrittentoPort1pins,theyarepulledhighbytheinter-nalpull-upsandcanbeusedasinputs.Asinputs,Port1pinsthatareexternallybeingpulledlowwillsourcecurrent（IIL）becauseoftheinternalpull-ups.Inaddition,P1.0andPl.lcanbeconfiguredtobethetimer/counter2externalcountinput（P1.0/T2）andthetimer/counter2triggerinput（P1.1/T2EX）,respectively,asshowninthefollow-ingtable.Port1alsoreceivesthelow-orderaddressbytesduringFlashprogrammingandverification.TablelPortPinAlternateFunctionsPl.0T2（externalcountinputtoTimer/Counter2）,clock-outPl.lT2EX（Timer/Counter2capture/reloadtriggeranddirectioncontrol）Pl.5MOSI（usedforIn-SystemProgramming）Pl.6MISO（usedforIn-SystemProgramming）Pl.7SCK（usedforIn-SystemProgramming）Port2：

@#@Port2isan8-bitbidirectionalI/Oportwithinternalpull-ups.ThePort2outputbufferscansink/sourcefourTTLinputs.WhenIsarewrittentoPort2pins,theyarepulledhighbytheinter-nalpull-upsandcanbeusedasinputs.Asinputs,Port2pinsthatareexternallybeingpulledlowwillsourcecurrent（IIL）becauseoftheinternalpull-ups.Port2emitsthehigh-orderaddressbyteduringfetchesfromexternalprogrammemoryanddur-ingaccessestoexternaldatamemorythatuse16-bitaddresses（MOVXDPTR）.Inthisapplication,Port2usesstronginternalpull-upswhenemittingIs.Duringaccessestoexternaldatamemorythatuse8-bitaddresses（MOVXRI）,Port2emitsthecontentsoftheP2SpecialFunctionRegister.Port2alsoreceivesthehigh-orderaddressbitsandsomecontrolsignalsduringFlashprogram-mingandverification.Port3：

@#@Port3isan8-bitbidirectionalI/Oportwithinternalpull-ups.ThePort3outputbufferscansink/sourcefourTTLinputs.WhenIsarewrittentoPort3pins,theyarepulledhighbytheinter-nalpull-upsandcanbeusedasinputs.Asinputs,Port3pinsthatareexternallybeingpulledlowwillsourcecurrent（IIL）becauseofthepull-ups.Port3receivessomecontrolsignalsforFlashprogrammingandverification.Port3alsoservesthefunctionsofvariousspecialfeaturesoftheAT89S52,asshowninthefol-lowingtable.Table2PortPinAlternateFunctionsP3.0RXD（serialinputport）P3.1TXD（serialoutputport）P3.2INTO（externalinterrupt0）P3.3INTI（externalinterrupt1）