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EA218EC6B

EA218E – 8-Port Ethernet Access Controller XpressFlow 2020 Ethernet Routing Switch Chipset

Zarlink Semiconductor Inc 

PRELIMINARY INFORMATION

Distinctive Characteristics

8 10Mbps Ethernet Access Ports

9 Direct interface with 10BaseT

transceiver

0.5 micron 3.3 Volt CMOS process

352-BGA package

Operating frequency

9 -33

33 MHz maximum

9 -40

40 MHz maximum

9 -50

50 MHz maximum

9 -66

mum

66.66 MHz maxi-

32-bit Local Buffer Memory Interface

9 Supports 128k to 1M bytes

9 Utilize high performance 32-bit

Synchronous Burst SRAM

Hardware assisted Buffer and Queue

Management

16-bit Management Bus I/O Interface

9 Allows host to access Control

Registers & Local Buffer Memory

9 Big and Little Endian CPUs

9 Direct interface to standard micro-

processors, including 386, 486

families and Motorola MPC series

embedded processors

32-bit XpressFlow Bus Interface

9 Uses Granule for frame transfer-

ring between Access Controllers

Unicast, multicast, and broadcast

frames

9 Also detects IEEE 802.3X MAC

Control frames

Works together with SC-220 Xpress-

Flow Engine

9 Forwards frames at full line-rate

9 Distributed Flow Caching™ to re-

duce frame forwarding latency

Half and Full Duplex operation

Programmable Flow Control

9 Jam Collision for Half Duplex

Mode

9 Transmit Flow Control Frame for

IEEE 802.3x Full Duplex Mode

Supports Store-&-Forward frame forward-

© 1998 Zarlink Semiconductor, Inc.

EA218E – 8-Port Ethernet Access Controller

XpressFlow 2020 Ethernet Routing Switch Chipset

LOCAL

BUFFER

MEMORY

XPRESSFLOW BUS

MANAGEMENT BUS

16

32

EA-218E

8-Port Ethernet

Access Controller

Port Port Port Port Port Port Port Port

01234567

10BaseT

Phyiscal Layer

Transceiver

8 10BaseT Ports

Block Diagram-

EA218E 8-Port Ethernet Access Controller

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.

Related Components:

SC220 – XpressFlow Engine

EA218 – 6-port 10 + 2-port 10/100 Ethernet Access Controller

EA234 – 4-port 10/100Mbps Ethernet Access Controller

1

Rev.2.1 – February, 1999

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