基于单片机电子钟的设计与实现.doc

陈薪羽：带日历电子钟的设计 华东交通大学毕业设计 PAGE 52 PAGE 51 电子钟的设计与实现—硬件部分 摘 要 单片计算机即单片微型计算机，是一种集成的电路芯片，是采用超大规模集成电路技术把具有数据处理能力的中央处理器CPU、随机存储器RAM、只读存储器ROM、多种I/O口和中断系统、定时器/计时器等功能（可能还包括显示驱动电路、脉宽调制电路、模拟多路转换器、A/D转换器等电路）集成到一块硅片上构成的一个小而完善的计算机系统。它体积小，成本低，功能强，广泛应用于智能产品和工业自动化上。而51单片机是各单片机中最为典型和最有代表性的一种。本次设计主要为实现一款可正常显示时钟/日历、带有定时闹铃的电子钟。 电子钟主要是利用电子技术将时钟电子化、数字化，拥有时钟精确、体积小、界面友好、可扩展性能强等特点，被广泛应用于生活和工作当中。另外，在生活和工农业生产中，也常常需要电子时钟具有多功能性。 本设计应用AT89S52芯片作为核心，LCD液晶显示，使用DS1302实时时钟日历芯片完成时钟/日历的基本功能。这种实现方法的优点是电路简单，性能可靠，实时性好，时间精度高，操作简单，编程容易。 该电子钟可以应用于一般的生活和工作中，也可通过改装，提高性能，增加新功能，从而给人们的生活和工作带来更多的方便。 关键词：电子钟；时钟日历芯片；AT89S52 The Design and Implementation of Electron Clock The Design of the Hardware Abstract The monolithic computer is a monolithic microcomputer, be one kind of integrated circuit chip, be that the width demonstrating drive circuit , pulse modulates breadboarding adopt the grand scale IC technology central authority processor CPU , random memory RAM , god of the earth read memory ROM , diversified I/O mouths and function (possibility such as interruption system , timer/ calculagraph having a data-handling capacity to be included, multi-path converter, A/D converter and so on circuit) integrated arrive at a piece of silicon slice upper formation one small but perfect computer system. Its volume is small , cost is low , the function is strong, apply to the intelligence product and the industrial automation broadly go ahead. But, 51 monolithic machine are that every representative and a kind of having representativeness most in monolithic machine. Design that being to realize one but to demonstrate the clock/ calendar regularly mainly, as well as electronic clock having noisy bell the regular time time. The electronic clock is to electronize , digitize mainly make use of electron technology with the clock , own the clock is accurate , volume is small , the interface is amicable , expansion the function waits for a characteristic by force , the quilt applies to life and the job broadly middle. Req