玩具发音电路设计摘要：音乐播放器常见于各种场合。随着各种场合的不同，要求也要相应的改变。单片机以其独特的结构和性能，越来越普遍地应用到国民经济建设的各个领域。以AT89S51来实现音乐播放，跟以其他的方式来实现相比，电路将更加的简单，适用性更高，通过控制单片机内部的定时器来产生不同频率的方波，驱动喇叭发出不同音调的音乐，再利用延迟来控制发音时间的长短。可以对单片机爱好者产生一定的借鉴价值。关键词：单片机；音乐；C51语言DesignoftoypronunciationcircuitAbstract:Musicplayerisverypopularinmanyoccasions,Alongwithcertainsituationrequest,thetimeprecisionisalsoenhancing.Monolithicintegratedcircuitappliedmoreandmoregenerallytoeachdomainofthenationaleconomyconstructionforitsuniquestructureandtheperformance.AT89S51toachieveamusicplayer.Thiskindofcontrolcircuithassimplestructure,highreliabilityandstrongapplication.Havingthedifferentfrequencysquare-wavethroughthecontrolmonolithicintegratedcircuitinteriortimer,actuatestheloudspeakertosendoutthedifferenttonalitythemusic,againusesretardscontrolsthepronunciationtimethelength.HavingthecertainmodelvaluetotheSCMloves..KeyWords:Monolithicintegratedcircuit；Music；C51language目录TOC\o"1-3"\h\z\uHYPERLINK\l"_Toc294209802"1绪论PAGEREF_Toc294209802\h1HYPERLINK\l"_Toc294209803"1.1课题研究背景PAGEREF_Toc294209803\h1HYPERLINK\l"_Toc294209804"1.2课题研究意义PAGEREF_Toc294209804\h1HYPERLINK\l"_Toc294209805"2整体方案的设计.PAGEREF_Toc294209805\h2HYPERLINK\l"_Toc294209806"2.1方案的选择和设计PAGEREF_Toc294209806\h2HYPERLINK\l"_Toc294209807"2.2核心器件AT89S51介绍PAGEREF_Toc294209807\h2HYPERLINK\l"_Toc294209808"2.2.1AT89S51简介PAGEREF_Toc294209808\h2HYPERLINK\l"_Toc294209809"2.2.2AT89S51芯片的引脚图PAGEREF_Toc294209809\h3HYPERLINK\l"_Toc294209810"3硬件电路的设计PAGEREF_Toc294209810\h4HYPERLINK\l"_Toc294209811"3.1方案总框架图PAGEREF_Toc294209811\h4HYPERLINK\l"_Toc294209812"3.2单片机的复位电路设计PAGEREF_Toc294209812\h4HYPERLINK\l"_Toc294209813"3.3显示电路设计PAGEREF_Toc294209813\h5HYPERLINK\l"_Toc294209814"3.3.1LED基本理论知识PAGEREF_Toc294209814\h5HYPERLINK\l"_Toc294209815"3.3.2发光二极管的检测PAGEREF_Toc294209815\h6HYPERLINK\l"_Toc294209816"3.3.3数码管与单片机的简单接口实验PAGE