This paper introduces the single-chip microcomputer 89C52, and mainly describes the application of single-chip microcomputer and its future history. This paper introduces the function setting of clock, alarm clock and stopwatch by using 89C52 single chip microcomputer. There are about 7447 chips, digital control devices and other hardware peripherals scattered in it.

With the development of society, automation is becoming more and more popular, and single chip microcomputer and PLC will be widely used. After the development of several generations of single-chip microcomputer, it is now relatively mature. No matter in daily life or industrial application, the figure of single chip microcomputer can be seen everywhere. Moreover, the cost of single chip microcomputer is low and the development cost is very low. If equipped with appropriate peripheral equipment, single-chip microcomputer can realize many functions. The language of single-chip microcomputer can be C language or assembly language. As long as you have studied advanced languages, single-chip microcomputer programming will become very easy.