Single-chip microcontroller that micro-computer (Single-Chip Microcomputer) gathering CPU, RAM, ROM, the timing, number and variety of interface integrated microcontrollers. Widely used in various fields. In this paper, the music alarm clock designed by AT89S53 SCM control. The music alarm clock from SCM system is the smallest system and the expansion of LED display circuit and voice circuit. Using single-chip C programming language, can be set to achieve a number of alarm clocks, alarm clocks on time to play music, and showing the date and other functions. This paper introduces the music alarm clock software and hardware design, and design, debugging process of the problems encountered and solutions. The topics designed music alarm system is simple, cost, low-cost, multifunctional, with a very strong sense of practicality. Keywords : music, simple arrangements, clock timing 题目:SCM Application Development-music electronic clock design 希望对您有所帮助,祝您成功!