The W5100 is a full-featured, single-chip Internet-enabled 10/100 Ethernet controllerdesigned for embedded applications where ease of integration, stability, performance, areaand system cost control are required. The W5100 has been designed to facilitate easyimplementation of Internet connectivity without OS. The W5100 is IEEE 802.3 10BASE-T and802.3u 100BASE-TX compliant.The W5100 includes fully hardwired, market-proven TCP/IP stack and integrated EthernetMAC & PHY. Hardwired TCP/IP stack supports TCP, UDP, IPv4, ICMP, ARP, IGMP and PPPoEwhich has been proven in various applications for several years. 16Kbytes internal buffer isincluded for data transmission. No need of consideration for handling Ethernet Controller, butsimple socket programming is required.