摘要

随着电子通信技术的发展，电子产品已被广泛的用于社会的各个领域，成为推动社会发展的技术动力一种。而在电子产品应用中，单片机的作用十分突出，单片机已经发展成为电子技术的核心，主导着电子产品的开发和电子技术市场的进一步的开拓。电子产业已成为社会电子信息化进程中的一个战略性产业。在电子技术的应用中，单片机的开发技术尤其是应用型电子产品的开发技术成了重中之重。不断开发适应用户需求、市场需要的新型电子产品。随着社会的发展，单片机也在不断的更新换代。AT89C51是一个低电压，高性能CMOS 8位单片机，利用AT89C51单片机控制发光二极管点亮来表现一按键多种功能。文章对AT89C51单片机芯片，晶体振荡器，涉及到的各元器件以及按键控制模型做了详细的介绍。

Along with the electronic communications technology's development, the electronic products widespread have used in social each domain, becomes the impetus social development the technical power one kind. But in the electronic products application, monolithic integrated circuit's function is very prominent, the monolithic integrated circuit already developed into the electronic technology core, is leading the electronic products development and the electronic technology market further development. The electronic industry has become in the social electron informationization advancement a strategic industry. In electronic technology's application, monolithic integrated circuit's development technology application electronic products' development technology has become the most important particularly. Develops the adaptation user's needs, the market requirement new electronic products unceasingly. Along with society's development, monolithic integrated circuit also in unceasing renewal. AT89C51 is a low voltage, the high performance CMOS 8 monolithic integrated circuits, lightens using at89C51 monolithic integrated circuit control light emitter diode displays pressed key many kinds of functions. The article to at89C51 monolithic integrated circuit chip, the crystal oscillator, various primary devices which as well as the pressed key control model involved has made the detailed introduction.