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1、毕业设计说明书Beyeshejishuomingshu地市:准考证号:010904201533姓名:李伟河南省高等教育自学考试VIII摘要基与51单片机可校时数字时钟电路设计,单片机计算机即单片微型计算机。(Single-ChipMicrocomputer)是集CPU,RAM,ROM,计数和多种接口于一体的微控制器。石英晶体振荡器是高精度的计时工具,而电子钟,石英表,石英钟都采用了石英技术,因此计时精度高,稳定性好,使用方便,不需要经常调校。而数字式电子钟用集成电路计时时,译码代替机械式传动,用LED显示器代替指针显示进而显示时间,减小了计时误差,这种表具
2、有时,分,秒显示时间的功能,还可以进行时和分的校对,片选的灵活性好。本文利用单片机实现数字时钟计时功能的主要内容,其中AT89S51是核心元件同时采用数码管动态显示“时”,“分”,“秒”的现代计时装置。与传统机械表相比,它具有走时精确,显示直观等特点。它的计时周期为24小时,显满刻度为“23时59分59秒”,另外具有校时功能,断电后有记忆功能,恢复供电时可实现计时同步等特点。本设计由单片机AT89S51芯片和LED数码管为核心,辅以必要的电路,构成了一个单片机数字时钟。关键词:单片机数字时钟LED数码管显示按键VIIIABSTRACTThebaseand5
3、1digitalclockwhenthemicrocontrollercanbetheschoolcircuitdesign,single-chipcomputerthatissingle-chipmicro-computer.(Single-ChipMicrocomputer)isaCPU,RAM,ROM,countingandmultipleinterfacesinonemicrocontroller.Quartzcrystaloscillatorisahigh-precisiontimingtools,electronicclock,quartzwa
4、tch,quartzisusedquartztechnology,highprecisiontiming,goodstability,easytouse,doesnotrequirefrequentadjustment.Thedigitalelectronicclockwiththetimeintegratedcircuits,thedecodinginsteadofmechanicaltransmission,withLEDdisplayinsteadofapointerdisplayandthendisplaythetimeandreducetheti
5、mingerror,thistablehasthehours,minutesandsecondsdisplaysthetimefunction,butalsoinprogressandsub-proof-reading,theflexibilityofagoodchipselect.Inthispaper,MCUfunctiondigitalclocktimingthemaincontentsofwhichAT89S51isacoreelementatthesametimetheuseofdigitalcontroldynamicdisplay"time"
6、,"sub","second"moderntimingdevices.Comparedwiththetraditionalmechanicalwatch,ithasatravel-timeaccuracy,displayandintuitiveandsoon.Itisatimeperiodof24hours,substantiallyfull-scaleas"23:59:59",anothertimewithaschoolfunction,memoryfunctionafterpoweroutages,powerrestorationcanberealiz
7、edwhenVIIIthetimesynchronizationandsoon.ThedesignbytheMCUAT89S51chipandLEDdigitaltubeasthecore,supplementedbythenecessarycircuitrytoformasinglechipdigitalclock.KEYWORDS:shrapnel,machine,digital,clock,LED,digital,tube,display,buttonVIII目录摘要………………………………………………………ⅠABSTRACT………………………………
8、……………………Ⅱ前言…………………………………………………………