In recent years, with the rapid development of science and technology, the application of SCM is continuously, and drive to the deepening traditional control test rapidly updated. In real-time detection and automatic control of microcomputer application system, microcontroller is often used as a core component knowledge, only microcontroller is not enough, still should according to the specific hardware structure, and the view of the specific application object characteristics, combining improved software.
Today, using single-chip microcomputer control ShengJu music playback not more music chip, is also, but using single chip computer storage music, control broadcast the most widely used. It has the function is much, competitive price and the characteristics of outer circuit is simple, very popular music lovers and music chip maker green ignorance. In this paper, with AT89C51 chip, and a few music played outside control circuits.