单片机电子时钟的设计（本科）毕业论文设计.doc

基于单片机的电子时钟设计 摘 要 现今，高精度的计时工具大多数都使用了石英晶体振荡器，由于电子钟，石英表，石英钟都采用了石英技术，因此走时精度高，稳定性好，使用方便，不需要经常调校数字式电子钟用集成电路计时，译码代替机械式传动，用LEDPLC的应用不断地走向深入。同时带动传统的控制检测技术的不断更新。可以采用早期的模拟电路、数字电路或模数混合电路。 本设计利用单片机实现数字时钟计时功能的主要内容，其中AT89C51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。 关键词：单片机，AT89C51，LED，显示器，电子时钟 BASED ON SCM ELECTRONIC CLOCK DISIGN ABSTRACT Now, most of the high precision tools have used quartz crystals oscillator. As the electron clock, quartz watches and quartz have adopted quartz technique，which is empty and high precision,good stability,andconvenience, there is no need to constantly adjust the use of electronic clock. Digital watches, which have reduced the timing errors and hve the houre、minite and second and can also underway and proofreading and slice of flexibility, have used integrated circuit to count time, in which decoding have replaced michical driven, and led display monitors replaced the pointer to display time. In recent years as technology evolved, microcontroller and PLC applications have go fother. promoting traditional control testing technical updating earlier. You can use the earlier digital circuit or circuit and hybrid circuit . In this complment, we have used the microcontroller to make true the timing of the digital clocks, in which has a core element of AT89c2051, with the morden counting michine digital to display at the time, points and seconds. Compared to the conventional mechanical watch, it is empty and intuitive . Its characteristics of the time period is 24 hours, and full scale as a 23’59’ 59, and other functions of the school after the electricity supply, to have time to achieve credible a synchronous. KEY WORDS: MICROCONTROLLER，，，， 毕业设计（论文）原创性声明和使用授权说明 原创性声明 本人郑重承诺：所呈交的毕业设计（论文），是我个人在指导教师的指导下进行的研究工作及取得的成果。尽我所知，除文中特别加以标注和致谢的地方外，不包含其他人或组织已经发表或公布过的研究成果，也不包含我为获得 及其它教育机构的学位或学历而使用过的材料。对本研究提供过帮助和做出过贡献的个人或集体，均已在文中作了明确的说明并表示了谢意。 作 者 签 名：　　 　 　　日　 期：