The 7100A device is an Ethernet controller SoC featuring an 'un-attackable' hardware network engine for preventing network attacks such as flooding, spoofing and injection. The W5200 device does not have the on-chip microcontroller and needs to be connected to an external host via an SPI serial bus.

iMCU W7100A Ethernet Controller SoC
8051-core SoC with hardwired TCP/IP protocol stack, MAC and PHY
Hardwired TCP/IP Protocols: TCP, UDP, ICMP, IPv4 ARP, IGMP, PPPoE
Support for ADSL connection (PPPoE Protocol with PAP/CHAP Authentication mode support)
10BaseT/100BaseTX Ethernet PHY Embedded
Support for Auto-Negotiation (Full/Half Duplex)
Support for Auto-MDIX
Code memory: 2KB Boot ROM, 64KB Flash EPROM
Data Memory: 256B Flash EPROM, 64KB RAM
Memory Lock Function
Up to 4 x 8-bit GPIO Ports (3.3V logic level, 5V tolerant, with Pull-Up/Pull-Down)
Full-duplex UART
Programmable Watchdog Timer
DoCD & trade compatible debugger
Power-Down mode
Power supply: +3.0V to +3.6Vdc
Operating temperature range: -40 to +80°C
Package: QFN64 (RS 758-1045)

iEthernet W5200 Ethernet Controller
Hardwired TCP/IP Protocols: TCP, UDP, ICMP, IPv4 ARP, IGMP, PPPoE
Support for ADSL connection (PPPoE Protocol with PAP/CHAP Authentication mode support)
10BaseT/100BaseTX Ethernet PHY Embedded
Support for Auto-Negotiation (Full/Half Duplex)
Support for Auto-MDIX
Host Communication: High Speed Serial Peripheral Interface (SPI Mode 0,3)
Internal 32KB RAM memory for TCP/IP packet processing
Power-Down mode with Wake-on-LAN
Power supply: +3.0V to +3.6Vdc
Operating temperature range: -40 to +85°C
Package: QFN48 (RS 758-1048)

Ethernet Communications

A range of Ethernet communications controllers, transceivers and switching ICs