论文_单片机电子时钟的设计

I单片机电子时钟的设计摘要单片机自20世纪70年代问世以来，以其极高的性能价格比，受到人们的重视和关注，应用很广、发展很快。单片机体积小、重量轻、抗干扰能力强、环境要求不高、价格低廉、可靠性高、灵活性好、开发较为容易。由于具有上述优点，在我国，单片机已广泛地应用在工业自动化控制、自动检测、智能仪器仪表、家用电器、电力电子、机电一体化设备等各个方面，而51单片机是各单片机中最为典型和最有代表性的一种。这次毕业设计通过对它的学习、应用，以AT89S51芯片为核心，辅以必要的电路，设计了一个简易的电子时钟，它由4.5V直流电源供电，通过数码管能够准确显示时间，调整时间，从而到达学习、设计、开发软、硬件的能力。关键词：单片机AT89S51电子时钟数码管IIDesignofthesinglechipelectronicsclockAbstractSingleslicemachinefrompublishedin70'sfor20centuries,iscomparewithitsveryhighfunctionprice,isvaluebypeopleandpayattentionto,applyverywidely,developveryquickly.Singleslicethemachinephysicalvolumeissmall,theweightislight,theanti-interferenceabilityisstrong,theenvironmenthaven'thighrequest,thepriceischeap,thecredibilityishigh,vividgood,developmoreeasy.Inordertohavinganabove-mentionedadvantage,attheourcountry,singleslicethemachineisbroadlyappliedalreadytoturnanequipmentatindustrialautomationcontrol,automaticexamination,intelligenceinstrumentappearance,homeappliances,electricpowerelectronics,themachineelectricityintegralwholeetc.eachaspect,but51machinesisisatypicalmodelmostandhavearepresentativemostineachmachineofakind.Thisgraduationdesignpassestoitsstudyandapplication,TaketheAT89S51chipsascore,assistwiththeelectriccircuitofthenecessity,designasimpleelectronicsclock,itfromthe4.5Vdirectcurrentpowersupplypowersupply,passthefigurestubecanaccuratemanifestationtime,adjusttime。Arriveastudyanddesign,developthussoft,theabilityofthehardware.Keywords：MCUAT89S51electronicsclockdigitaltubeIII目录摘要.......................................................................................................................................................IAbstract......................................................................................................................................................II第一章前言.........................................................................................................................................1第二章方案论证与比较.....................................................................................................................22.1数字时钟方案...............................................................................................................................22.2数码管显示方案...........................................................................................................................2第三章系统设计.................................................................................................................................33.1总体设计.......................................................................................................................................33.1.1系统说明............................................................................................................................33.1.2系统框图............................................................................................................................33.2模块设计.......................................................................................................................................43.2.1电源部分............................................................................................................................43.2.2复位电路............................................................................................................................43.2.3程序下载接口....................................................................................................................53.2.4位选部分............................................................................................................................53.2.5数码管的连接电路............................................................................................................63.2.6控制部分............................................................................................................................6第四章原理图与PCB图.....................................................................................................................8第五章软件设计.................................................................................................................................95.1程序流程图...................................................................................................................................95.2源程序.........................................................................................................................................11第六章总结.......................................................................................................................................186.1物品清单与元件特性.................................................................................................................186.2设计总结.....................................................................................................................................19参考文献（References）：......................................................................................................................20致谢....................................................................................................