基于at89c52单片机的交通灯控制系统设计(外文翻译)

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1、电子与信息工程学院本科毕业论文(设计)外文文献翻译译文题目：8-bitMicrocontrollerWith8KBytesFlashAT89C52学生姓名：吴远超专业：电气工程及其自动化指导教师：倪浩2012年11月外文资料8-bitMicrocontrollerWith8KBytesFlashAT89C52FeaturesCompatiblewithMCS-51™Products8KBytesofIn-SystemReprogrammableFlashMemoryEndurance:1,000Write/EraseCyclesFullySta

2、ticOperation:0Hzto24MHzThree-levelProgramMemoryLock256x8-bitInternalRAM32ProgrammableI/OLinesThree16-bitTimer/CountersEightInterruptSourcesProgrammableSerialChannelLow-powerIdleandPower-downModesDescriptionTheAT89C52isalow-power,high-performanceCMOS8-bitmicrocomputerwith8Kby

3、tesofFlashprogrammableanderasablereadonlymemory(PEROM).ThedeviceismanufacturedusingAtmel’shigh-densitynonvolatilememorytechnologyandiscompatiblewiththeindustry-standard80C51and80C52instructionsetandpinout.Theon-chipFlashallowstheprogrammemorytobereprogrammedin-systemorbyacon

4、ventionalnonvolatilememoryprogrammer.Bycombiningaversatile8-bitCPUwithFlashonamonolithicchip,theAtmelAT89C52isapowerfulmicrocomputerwhichprovidesahighly-flexibleandcost-effectivesolutiontomanyembeddedcontrolapplications.PinConfigurationsBlockDiagramPinDescriptionVCCSupplyvol

5、tage.GNDGround.Port0Port0isan8-bitopendrainbi-directionalI/Oport.Asanoutputport,eachpincansinkeightTTLinputs.When1sarewrittentoport0pins,thepinscanbeusedashigh-impedanceinputs.Port0canalsobeconfiguredtobethemultiplexedlow-orderaddress/databusduringaccessestoexternalprograman

6、ddatamemory.Inthismode,P0hasinternalpull-ups.Port0alsoreceivesthecodebytesduringFlashprogrammingandoutputsthecodebytesduringprogramverification.Externalpull-upsarerequiredduringprogramverification.Port1Port1isan8-bitbi-directionalI/Oportwithinternalpull-ups.ThePort1outputbuf

7、ferscansink/sourcefourTTLinputs.When1sarewrittentoPort1pins,theyarepulledhighbytheinternalpull-upsandcanbeusedasinputs.Asinputs,Port1pinsthatareexternallybeingpulledlowwillsourcecurrent(IIL)becauseoftheinternalpull-ups.Inaddition,P1.0andP1.1canbeconfiguredtobethetimer/counte

8、r2externalcountinput(P1.0/T2)andthetimer/counter2triggerinput(P1.1/T2EX),re