说明：  该资料为lan91c111芯片的英文原版数据手册，详细介绍了LAN91C111的结构，功能特性，软件驱动流程等。LAN91C111为SMSC公司生产的以太网控制芯片，为第三代高速以太网连接提供嵌入式解决方案。
(The datasheet of LAN91C111.The SMSC LAN91C111 is designed to facilitate the implementation of a third generation of Fast Ethernet connectivity solutions for embedded application.)