多功能电子时钟系统设计大学毕设论文.doc

多功能电子时钟系统设计 学院名称： 专 业： 班 级： 姓 名： 学 号： 指导教师姓名： 俞 洋 2013年月系统设计 摘要人们对数字钟的要求也越来越高，多功能数字钟不管在性能还是在样式上都发生了质的变化。因此本系统采用单片机作为数字钟的核心控制器，读取时钟芯片的值，并通过显示器显示出来，而且，可以通过按键电路给单片机执行信号，。采用AT89S52作为主控单片机，时钟模块选用DS作为时钟芯片，显示模块选用LCD1602，设置部分选用按键电路。关键词：Multifunction electronic clock system design Abstract With the fast-paced development of society , time becomes a essential tool which to be used in our daily routine , in order to complete the work more efficiently, in order to accelerate progress and development of society, it is particularly important to grasp and control the time. multi-functional digital clock regardless of the style or performance on both a qualitative change . Digital clock design There are many ways , for example , can be composed of small and medium- scale integrated circuits electronic bell ; also be used with a dedicated chip electronic clock display circuit and its peripheral circuit required electronic bell ; chip can also be used to implement electronic bell and so on. These methods have their own characteristics , including the use of electronic clock with MCU programming flexibility , functionality and ease of expansion. But here in order to learn digital circuits, including combinational logic circuits and sequential circuits of study, using small and medium scale integrated circuits digital clock . Therefore, the system uses the MCU as the core controller digital clock , clock chip to read the values ??displayed by the display , and can be performed through the key signal to the microcontroller circuit to achieve normal display, clock and stopwatch calibration switch . Using AT89S52 microcontroller as the master clock module selection as the DS1302 clock chip, display module selection LCD1602, setting part of the selection key circuit . This design is a microcontroller as the core , the additional necessary peri