本文章总体介绍了51单片结构和功能，而且例举了一些例子，很好的说明了其很适合初学者学习，容易入门，是初学者的福音。-This article describes the overall 51 monolithic structure and function, but also cites some examples of very good descr iption of it is suitable for beginners to learn, easy to get started, g