WIZnet W5500 Ethernet hardware TCP / IP protocol stack (LQFP-48)
10BaseT/100BaseTX Ethernet MAC/PHY
Hardware TCP/IP Protocol Handling
8 TCP/UDP Sockets
32KB RAM Buffer
Power-Down, Wake-On-LAN, Auto-Negotiation
Fast SPI Interface
Single 3.3V Power Supply, 5V Tolerant I/O
48-Pin LQFP Lead-Free Package
W5500 Documents
http://wizwiki.net/wiki/doku.php?id=products:w5500:datasheet
W5500 Driver
http://wizwiki.net/wiki/doku.php?id=products:w5500:driver
W5500 Reference Schematic
http://wizwiki.net/wiki/doku.php?id=products:w5500:refschematic
W5500 Reference Board Designs
http://wizwiki.net/wiki/doku.php?id=osh