基于51单片机的电子时钟设计与实现-学士学位论文.doc

摘要 单片机自20世纪70年代问世以来，以其极高的性能价格比，受到人们的重视和关注，应用很广、、、、、、、、、、、、、、、、、，因此得到了广泛的使用。 ABSTRACT Since the 1970 s chip since the advent, with its high cost performance and attention by people and attention, it is widely used and fast development. SCM small volume, light weight, strong anti-jamming capability, environmental demand is not high, low cost, high reliability, flexibility is good, development more easy. Because of the above features, in our country, the microcontroller is widely used in industrial automation control, automatic detection, intelligent instrument and apparatus, household appliances, power electronics, mechanical and electrical equipment, and other aspects, and 51 SCM is the most typical chip and most representative one. The graduation design through to its study, application to AT89S51 chips as the core, with the necessary circuit, design of a simple electronic clock, it by 4.5 V dc power supply, through the electronic tube can show time, adjust the time, thus to learning, the design, the development of software and hardware in the ability. Electronic Clock is a electronic circuit implementation of the when, sub, seconds The figures show the timing device. Electronic clock precision, stability, far more than the old mechanical clock. In this design, we use LED electronic display hours, minutes, seconds, to 24-hour time mode, according to electronic control theory to dynamic display to display, use the 12MHz crystal oscillation pulse, the timer count. In this design, the circuit has a display time of the this function, you can also realize the time adjustment. Electronic clock is its compact, low cost, travel time and high precision, easy to use, features and more, easy integration and loved by the general consumer, so widely used. Key words: Single-chip microcomputer ; AT89S51 独 创 声 明 本人郑重声明：所呈交的毕业设计(论文)，是本人在指导老师的指导下，独立进行研究工作所取得的成果，成果不存在知识产权争议。尽我所知，除文中已经注明引用的内容外，本设计（论文）不含任何其他个人或集体已经发表或撰写过的作品成果。对本文的研究做出重要贡献的个人和集体均已在文中以明确方式标明。 本声明的法律后果由本人承担。 ? 作者签名: