W5100S (W5100S-L & W5100S-Q) Version 1.2.5 W5100S W5100S WIZnet Hardwired TCP/IP Embedded Internet Controller Chip . W5100S Internet protocol (TCP/IP) Full Hardwired Logic, Ethernet MAC(Media Access Control), 10Base-T/100Base-TX Ethernet PHY Internet connectivity One-chip Solution . W5100S Host( MCU) TCP, UDP, ICMP, IPv4, IGMP, ARP, PPPoE Hardwired Logic , Low-end Host / 8KB . W5100S Hardwired SOCKET 4 Internet . W5100S Host Serial SPI Interface Parallel System BUS Interface . , / , WOL (Wake On LAN) Ethernet PHY Power Down mode . W5100S W5100 . W5100S W5100 Firmware , W5100 48 Pin LQFP & QFN Lead-Free Package . 2 / 109 W5100S Datasheet Version1.2.5