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  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  EEPROM at start-up or reset. 

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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