基于51单片机的数字时钟.doc

课 程 设 计 题目 基于51单片机的数字时钟  摘 要 数字钟已成为人们日常生活中必不可少的必需品，广泛用于个人家庭以及办公室等公共场所，给人们的生活、学习、工作、娱乐带来极大的方便。由于数字集成电路技术的发展和采用了先进的石英技术，使数字钟具有走时准确、性能稳定、携带方便等优点，它还用于计时、自动报时及自动控制等各个领域。尽管目前市场上已有现成的数字钟集成电路芯片出售，价格便宜、使用也方便，但鉴于单片机的定时器功能也可以完成数字钟电路的设计，因此进行数字钟的设计是必要的。在这里我们将已学过的比较零散的数字电路的知识有机的、系统的联系起来用于实际，来培养我们的综合分析和设计电路，写程序、调试电路的能力。 单片机具有体积小、功能强可靠性高、价格低廉等一系列优点，不仅已成为工业测控领域普遍采用的智能化控制工具，而且已渗入到人们工作和和生活的各个角落，有力地推动了各行业的技术改造和产品的更新换代，应用前景广阔。 关键词:数字时钟 智能 电路  A digital clock has become necessary in Peoples Daily life necessities, widely used in personal homes and offices in public places, give people life, study, work, entertainment bring great convenience. As digital integrated circuit technology development and the use of advanced quartz technology, make a digital clock has keeps good time, stable performance, carry convenience etc, it is also used in automatic timer, time and automatic control, etc. Despite already on the market at present the ready-made integrated circuit chip digital clock sale, price cheap, use convenient, but with single-chip microcomputer timer function can also completed a digital clock circuit design of digital clock, so the design is necessary. Here we will have already learned comparative scattered digital circuit knowledge organic, system for actual, linked to develop our comprehensive analysis and design circuits, writing programs, debugging circuit ability. SCM has small, strong function high reliability, low prices and so on a series of advantages, not only has become widely used industry measurement and control field of intelligent control tool, and has penetrated into people work and and each corners of the life, effectively promote the various sectors of technical transformation and upgrading of products and broad prospect of application. Keywords: digital clock intelligent circuit 目 录 摘 要 1 目 录 3 第一章 数字时钟设计的意义及目的 5 1.1数字时钟设计的意义 5 1.2数字时钟设计的目的 5 第二章 系统总体方案设计 6 2.1 实现时钟计时的基本方法 6 2.2 电子钟的时间显示 6 2.3 电子钟的时间调整 6 2.4 总体方案介绍 7 2.4.1 计时方案 7 2.4.2 控制方案 7 第三章 系统硬件