单片机各种总线介绍。全面介绍了各种总线接口及其一些使用方法，有了他，就不用再去网上找其他资料了，有图片，直观真实-Introduction of single-chip bus. Comprehensive descr iption of the various bus interfaces and some of its use, with him, do not go online to find other information, and there are pictures, intu