GENERAL DESCRIPTION

The LAN91C100 FEAST is a high-speed network controller designed to facilitate the implementation of Fast Ethernet adapters and connectivity products. It contains a dual speed CSMA/CD engine that implements the MAC portion of the CSMA/CD protocol at 10 and 100 Mbps and couples it with a lean and fast data and control path system architecture to ensure data movement with no bottlenecks at 100 Mbps.

Memory management is handled using a unique MMU (Memory Management Unit) architecture and a 32-bit wide data path. This I/O mapped architecture can sustain back-to-back frame transmission and reception for superior data throughput and optimal performance.

FEATURES

· Dual Speed CSMA/CD Engine (10 Mbps and 100 Mbps)

· Compliant with IEEE 802.3 100BASE-T Specification

· Supports 100BASE-TX, 100BASE-T4, and 10BASE-T Physical Interfaces

· 32 Bit Wide Data Path (Into Packet Buffer Memory)

· Support for 32 and 16 Bit Buses

· Support for 32, 16 and 8 Bit CPU Accesses

· Synchronous, Asynchronous and Burst DMA Interface Mode Options

· 128 Kbyte External Memory

· Built-in Transparent Arbitration for Slave

Sequential Access Architecture

· Flat MMU Architecture with Symmetric

Transmit and Receive Structures and Queues

· MII (Media Independent Interface)

Compliant MAC-PHY Interface (Compliant with Emerging MII Standard Interface)

· MII Management Serial Interface

· Seven Wire Interface to 10 Mbps ENDEC (LAN83C694)

· EEPROM-Based Setup

· 208 Pin PQFP and TQFP Package