说明：   单片机控制RTL8019AS实现以太网接口实例，改程序用C编写。原理图用protel设计。 包括以太网初始化程序、发送程序和接收数据程序。 单片机系统为整个电路的主处理部分，其作用主要包括对以太网接口芯片的初始化配置 以及以太网数据的发送和接收控制。
(SCM RTL8019AS Ethernet interface, an instance, change program written with C. With protel schematic design. Initialization procedures, including Ethernet, send and receive data process procedures. SCM system for the entire circuit of the main processing part, the role includes the initialization of the Ethernet interface chip configuration and the Ethernet data to send and receive control.)