1、 摘摘 要要 本系统利用单片机实现具有计时、校时、闹钟、语音播报等功能的数字时 钟， 是以单片机 AT89S51 为核心元件同时采用数码管显示器动态逐次显示 “年” ， “月日” ， “时分” ， “秒”的现代计时装置。与传统机械时钟相比，它具有走时 精确,显示直观等特点。在日常生活和自动控制系统中，经常遇到对时间实时监 控的需求，本系统在对时间监控的同时，若达到预先设定的时间后，能使 LED 不停闪烁提示时间已到。另外本程序还具有校时功能，能够随时调整时间，而 且能够随时方便的扩充扩展其他多功能，因此利用单片机实现的本数字时钟具 有编程灵活，便于功能的扩充等优点。 关键字：AT89S51；单
2、片机；数字钟；LED 数码管 AbstractAbstract This system using the single chip microcomputer timer, the school has, alarm clock, the function such as speech broadcast digital clock, is AT89S51 single-chip microcomputer as the core components as well as using digital tube display dynamic successive shows “year“,
3、“may,“ “time“, “seconds“ modern timing device. Compared with the traditional mechanical clock, it is accurate, when direct display characteristics. In the daily life and the automatic control system, it is time to meet the needs of the real-time monitoring, this system for monitoring in time, and at
4、 the same time, to set time in advance if after all, can make the LED twinkle tip the time has come. In addition the program also has the function, can adjust in time, and at any time convenient to expand the expansion of the other, so using the single chip microcomputer multi-function of the digital clock has programming, facilitate the expansion of the flexible function etc. Key word:AT89S51；single-chip microcomputer；A digital clock；LED digital tube 目目 录录 引
