Description: 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.
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单片机音乐琴系统.doc
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