互联网络硬件、软件的迅猛发展，使得网络用户呈指数增长，在使用计算机进行网络互联的同时，各种家电设备、仪器仪表以及工业生产中的数据采集与控制设备在逐步地走向网络化，以便共享网络中庞大的信息资源。在电子设备日趋网络化的背景下，利用廉价的51单片机来控制RTL8019AS实现以太网通讯具有十分重要的意义-Internet hardware, software, rapid development of the exponential growth of Internet users in the use of computer networking at the same time, various appliances, instrumentation, and industrial production data acquisition and control equipment in gradually moving toward network-based, in order to sharing network in the huge information resources. Electronic equipment in an increasingly networked context, the use of low-cost single-chip microcomputer 51 to control RTL8019AS Ethernet communications of great significance