多功能定时器的设计参考.doc

编号： 　毕业设计说明书 题 目： 多功能定时器的设计 题目类型：?理论研究 ?实验研究 ?工程设计 ?工程技术研究 ?软件开发 摘 要 在日常生活和工作中，我们常常用到定时控制，早期常用的一些时间控制单元都使用模拟电路设计制作的，其定时准确性和重复精度都不是很理想，现在基本上都是基于数字技术的新一代产品，随着单片机性能价格比的不断提高，新一代产品的应用也越来越广泛，大可构成复杂的工业过程控制系统，完成复杂的控制功能。小则可以用于家电控制，甚至可以用于儿童电子玩具。它功能强大，体积小，质量轻，灵活好用，配以适当的接口芯片，可以构造各种各样、功能各异的微电子产品。 随着电子技术的飞速发展，家用电器和办公电子设备逐渐增多，不同的设备都有自己的控制器，使用起来很不方便。根据这种实际情况，设计了一个单片机多功能定时系统，它可以避免多种控制器的混淆，利用一个控制器对多路电器进行控制，可以任意设置控制时间长度，同时又可以进行时钟校准和定点打铃。这种具有人们所需要的智能化特性的产品减轻了人的劳动，扩大了数字化的范围，为家庭数字化提供了可能。 关键词：单片机；定时器 Abstract Time-controller is often used in our daily life and working time. Some time-control units used in the past are all designed by analog circuit, which timing accuracy and repeatability precision aren’t very good. Nowadays, with the increasing property and decreasing price of the Single-Chip Computer, the new generation products based on the digital technology are more widely applied from the complicated industrial processing control system which can accomplish the sophisticated control function to home appliance controller, even the children’s electronic toys. Thanks to its powerful and complex function associated with small size and light weigh ,the chip attached the proper interconnected chip can create various type of microelectronic products which has different function. With the rapidly development of the microelectronic technology, home appliances and office electronic instruments are growing step by step. It is unconvenient for using them because different apparatus has its own time-controller. Taken into account the real situation, a multi-purpose time-controller SCM has been designed, which can avoid the confusion of different time-controller and use a controller to regulate alternative apparatus, furthermore, time length can be set freely, check the clock as well as time-control belling at the same time. This kind of product needed by people is featured with intellectualized reduce the people labor pressure, expand the usage of digital scope and make