总 体 概 述

本设计采用AT89S52单片机作为整个系统的控制核心，具有:音乐琴, 电子钟, LED阵列扫描显示, 液晶字符显示, 循环彩灯 五个模块。音乐琴采用4X4矩阵键盘为输入键盘,共有十六个基本音, 并与其他功能组合, 具有一定的实用性与趣味性, 较好的完成题目要求。

关键词：单片机 矩阵键盘 频率 。

-A general overview of the design using AT89S52 microcontroller as the core of the control of the entire system, with: music piano, digital clock, LED array scanning, LCD character display, cycle Lantern five modules. The music piano 4X4 matrix keyboard input keyboard, a total of 16 basic sound, and in combination with other features, has a certain practicality and fun, the completion of the requirements of the subject. Key words: SCM matrix keyboard frequency.