The LAN9221/LAN9221i is a full-featured, single-chip 10/100 Ethernet controller designed for embedded applications where performance, flexibility, ease of integration and system cost control are required. The LAN9221/LAN9221i has been specifically designed to provide high performance and throughput for 16-bit applications. The LAN9221/LAN9221i is fully IEEE 802.3 10BASE-T and 802.3u 100BASE-TX compliant, and supports HP Auto-MDIX. The variable voltage I/O signals of the LAN9221/LAN9221i accommodate lower voltage I/O signalling without the need for voltage level shifters.

The LAN9221/LAN9221i includes an integrated Ethernet MAC and PHY with a high-performance SRAM-like slave interface. The simple, yet highly functional host bus interface provides a glue-less connection to most common 16-bit microprocessors and microcontrollers as well as 32-bit microprocessors with a 16-bit external bus. The integrated checksum offload engines enable the automatic generation of the 16-bit checksum for received and transmitted Ethernet frames, offloading the task from the CPU. The LAN9221/LAN9221i also includes large transmit and receive data FIFOs to accommodate high latency applications. In addition, the LAN9221/LAN9221i memory buffer architecture allows highly efficient use of memory resources by optimizing packet granularity.

The 93AA46AE48 EEPROM device from Microchip comes with a factory programmed, globally unique EUI-48™ MAC Address. This Ethernet controller will automatically detect and load the EUI-48™ node address from the 93AA46AE48 EEPROM at start-up or reset. 

Highlights

• Optimized for high performance applications
• Efficient architecture with low CPU overhead
• Easily interfaces to most 16-bit embedded CPU's
• 1.8V to 3.3V variable voltage I/O accommodates wide range of I/O signaling without voltage level shifters
• Integrated PHY with HP Auto-MDIX support
• Integrated checksum offload engine helps reduce CPU load
• Low pin count and small body size package for small form factor system designs

Target Applications

• Cable, satellite, and IP set-top boxes
• Digital video recorders and DVD recorder/players
• Digital TV
• Digital media clients/servers and home gateways
• Video-over IP solutions, IP PBX & video phones
• Wireless routers & access points
• High-end audio distribution systems

Key Benefits

• Non-PCI Ethernet controller for high performance applications
  • 16-bit interface with fast bus cycle times
  • Burst-mode read support
• Minimizes dropped packets
  • Internal buffer memory can store over 200 packets
  • Automatic PAUSE and back-pressure flow control
• Minimizes CPU overhead
  • Supports Slave-DMA
  • Interrupt Pin with Programmable Hold-off timer
• Reduces system cost and increases design flexibility
• SRAM-like interface easily interfaces to most Embedded CPU's or SoC's
• Reduced-Power Modes
  • Numerous power management modes
  • Wake on LAN
  • Magic packet wakeup
  • Wakeup indicator event signal
  • Link Status Change
• Single chip Ethernet controller
  • Fully compliant with IEEE 802.3/802.3u standards
  • Integrated Ethernet MAC and PHY
  • 10BASE-T and 100BASE-TX support
  • Full- and Half-duplex support
  • Full-duplex flow control
  • Backpressure for half-duplex flow control
  • Preamble generation and removal
  • Automatic 32-bit CRC generation and checking
  • Automatic payload padding and pad removal
  • Loop-back modes
• Flexible address filtering modes
  • One 48-bit perfect address
  • 64 hash-filtered multicast addresses
  • Pass all multicast
  • Promiscuous mode
  • Inverse filtering
  • Pass all incoming with status report
  • Disable reception of broadcast packets
• Integrated 10/100 Ethernet PHY
  • Supports HP Auto-MDIX
  • Auto-negotiation
  • Supports energy-detect power down
• Host bus interface
  • Simple, SRAM-like interface
  • 16-bit data bus
  • 16Kbyte FIFO with flexible TX/RX allocation
  • One configurable host interrupt
• Miscellaneous features
  • Small form factor, 56-pin QFN RoHS Compliant package
  • Integrated 1.8V regulator
  • Integrated checksum offload engine
  • Mixed endian support
  • General Purpose Timer
  • Optional EEPROM interface
  • Support for 3 status LEDs multiplexed with Programmable GPIO signals
• Single 3.3V Power Supply with Variable Voltage I/O
• Commercial and Industrial Temperature Support