说明：  W5100 是一款多功能的单片网络接口芯片，内部集成有10/100 以太网控制器，主要应用于高集 成、高稳定、高性能和低成本的嵌入式系统中。这是中文资料我找了很长时间，现在和大家分享一下。
(W5100 is a versatile single-chip network interface chip, the internal integrated 10/100 Ethernet controller, mainly used in highly integrated, high stability, high performance and low-cost embedded systems. This is the Chinese data, I find a very long time now and share with you.)