新型音乐报时数字钟摘要作为可以实现时分秒计时的钟表，数字表要比传统的机械表相比要更加直观与精确使用期限也要比传统的机械表更长，目前已经取代机械表得到钟表用户的广泛使用。设计数字钟电子钟的方法多种多样，可以通过小规模集成电路组成或专用的电子钟芯片配以显示电路加上所需的外围电路组成，同时还可以利用单片机来实现电子钟的运转等方法。利用单片机来设计电视子中具有编程灵活和便于扩展功能等一系列优点。在本次论文中介绍的电子钟系统就是由单片机（AT89C52）为核心，时钟芯片DS1302、数码管显示驱动芯片MAX7219等元器件组成。重点介绍了Proteus的ISIS软件如何通过单片机系统来设计电子钟。这种方法不仅能够验证设计系统的技术层次，才能更好的完善系统设计的质量，同时又在一定程度上降低了开发成本，更加体现其社会价值。在当前社会音乐报时时钟已经成为大部分人生活工作的一部分，时针电路也在计算机系统中提供了技术应用。关键词：数字钟；报时；单片机AbstractAsatimekeepingclock,theclockismoreintuitiveandaccuratethanthetraditionalmechanicalmeter,andtheuseperiodislongerthanthetraditionalmechanicalmeter.Atpresent,ithasreplacedthemechanicalwatchtogetthewideuseoftheclockusers.Therearemanywaystodesignthedigitalclockelectronicclock.Itcanbecomposedofsmallscaleintegratedcircuitorspecialelectronicclockchip,whichiscomposedofdisplaycircuitandperipheralcircuit.Atthesametime,wecanmakeuseofsinglechipcomputertorealizetheoperationofelectronicclock.UsingMCUtodesigntheTVsubhasaseriesofadvantages,suchasflexibleprogrammingandeasyexpansion.Theelectronicclocksystemintroducedinthispaperiscomposedofsinglechipcomputer(AT89C52)asthecore,clockchipDS1302,digitaltransistordisplaydriverchipMAX7219andothercomponents.ThispapermainlyintroduceshowProteus'sISISsoftwaredesignstheelectronicclockthroughthesinglechipmicrocomputersystem.Thismethodcannotonlyverifythetechnicallevelofthedesignsystem,butalsobetterimprovethequalityofthesystemdesign.Atthesametime,itcanalsoreducethecostofdevelopmenttoacertainextent,andmorereflectitssocialvalue.Inthecurrentsociety,musictimeclockhasbecomeapartofmostpeople'slifeandwork,andtheclockcircuithasalsoprovidedtechnicalapplicationincomputersystem.Keywords:digitalclock;timeoftime;singlechipmicrocomputer2目录前言......................................................................31.总体设计方案............................................................41.1电路原理框图...........................................................41.1.1数字钟电路组成框图...................................................41.1.2各部分的作用及要求...................................................51.2数字钟的电路原理图....................................................52．单元模块设计...........................................................72.1MCS51单片机控制电路...................................................72.2电源电路..............................................................92.3按键电路.............................................................102.4时钟电路.............................................................102.5复位电路.............................................................112.6数码管显示电路.......................................................122.7蜂鸣器电路...........................................................133．软件设计..............................................................143.1主程序流程框图.......................................................143.2中断服务程序流程框图....................................
