This paper, through the analysis of the design principle of single chip microcomputer application system, expounds the components part and matters needing attention in the design of the system, aims to provide some suggestions for the design and development of the application system.%本文通过分析单片机应用系统设计的原则，简单介绍单片机应用系统的组成部分以及在系统设计中应该注意的事项，以此为单片机应用系统的设计与开发提供相应的建议。
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