说明：  这次毕业设计通过对它的学习、应用，以AT89C51芯片为核心，辅以必要的电路，设计了一个简易的电子时钟，是以单片机AT89C51为核心元件同时采用LED数码管显示器动态显示“时”，“分”，“秒”的现代计时装置。它由单片机作为数字钟的核心控制器，通过它的时钟信号进行实现计时功能，将其时间数据经单片机输出，利用显示器显示出来。通过键盘可以进行校时、定时等功能。输出设备显示器可以用液晶显示技术和数码管来显示技术。 模块化的设计和调试方法在整个课题研究过程中至关重要，事实上在任何设计中也同样关键和有效。
(The graduation design based on the study and application, it is the core, with AT89C51 chips with the necessary circuit design, a simple electronic clock, based on single-chip AT89C51 as the core element using LED digital display dynamic display of the tube, "" points", "second" modern timing devices. It consists of single chip microcomputer as the core controller, digital clock through its clock signal timing function, will realize its time, using SCM outputs data display. Through the keyboard can be reset, timing etc. Function. Output devices with LCD monitors can technology and digital tube to display technology. Modular design and debug method in the research process, in fact is crucial in any design is also the key and effective. )