毕业设计（论文）基于单片机的电子钟设计.doc

基于单片机的电子时钟设计 摘 要 20世纪末，电子技术获得了飞速的发展，在其推动下，现代电子产品几乎渗透了社会各个领域，有力地推动了社会生产力的发展和社会信息化程度的提高，同时也使现代电子产品性能进一步提高，产品更新换代的节奏也越来越快。，因此得到了广泛的使用。Abstract  The late 20th century, electronic technology has been rapid development in its promotion, penetration of modern electronic products will almost Fields, a strong impetus to the development of social productive forces and social improvement in the level of information, while also further improve the performance of modern electronic products, replacement products have become increasingly fast pace. ??? Growing emphasis on modern life from the time the concept of time and money can be said to draw the equal sign. For those who are very strict and accurate grasp of time and things, time will not exactly bring a very big trouble, so as to control the display of digital clock than the clock pointer showed a big advantage. Digital display of time reading simple and fast, accurate display of time to seconds. The mechanical oscillator depends on the crystal may lead to errors.  Digital Clock is a digital circuit implementation of the when, sub, seconds The figures show the timing device. Digital clock precision, stability, far more than the old mechanical clock. In this design, we use LED digital display hours, minutes, seconds, to 24-hour time mode, according to digital 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. Digital 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. Keywords: digital electronic clock SCM 目 录 第一章 绪论1 数字电子钟的背…………………………………………………………………… 4 1.2 数字电子钟的意义……………………………………………………………………数字钟的应用……………………………………………………………………二章 整体设计方案 2.1 单片机的选择……………………………………………………………………………2.2 单片机的基本结构………………………………………………………………………第三章 数字钟的硬件设计 3.1 最小系统