General Description

The EA-218E provides eight 10Mbps Ethernet network access interface ports.

The EA-218E provides the Ethernet MAC protocols, handles the local buffer memory interface and management, arbitrates among multiple priority queues, and interfaces with the XpressFlow Engine and other Access Controllers through the XpressFlow message passing protocol.

Distinctive Characteristics

◆ 8 10Mbps Ethernet Access Ports

◇ Direct interface with 10BaseT transceiver

◆ 0.5 micron 3.3 Volt CMOS process

◆ 352-BGA package

◆ Operating frequency

◇ -33 33 MHz maximum

◇ -40 40 MHz maximum

◇ -50 50 MHz maximum

◇ -66 66.66 MHz maximum

◆ 32-bit Local Buffer Memory Interface

◇ Supports 128k to 1M bytes

◇ Utilize high performance 32-bit Synchronous Burst SRAM

◆ Hardware assisted Buffer and Queue Management

◆ 16-bit Management Bus I/O Interface

◇ Allows host to access Control Registers & Local Buffer Memory

◇ Big and Little Endian CPUs

◇ Direct interface to standard microprocessors, including 386, 486 families and Motorola MPC series embedded processors

◆ 32-bit XpressFlow Bus Interface

◇ Uses Granule for frame transferring between Access Controllers

◆ Unicast, multicast, and broadcast frames

◇ Also detects IEEE 802.3X MAC Control frames

◆ Works together with SC-220 XpressFlow Engine

◇ Forwards frames at full line-rate

◇ Distributed Flow Caching? to reduce frame forwarding latency

◆ Half and Full Duplex operation

◆ Programmable Flow Control

◇ Jam Collision for Half Duplex Mode

◇ Transmit Flow Control Frame for IEEE 802.3x Full Duplex Mode