CS8920A datasheet(1/144 Pages) CIRRUS

部件名	CS8920A

功能描述	CRYSTAL LAN ISA PLUG-AND-PLAY ETHERNET CONTROLLER

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制造商	CIRRUS [Cirrus Logic]

网页	http://www.cirrus.com

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CS8920A

Advanced Product Databook

&U\VWDO /$1TM ISA

Plug-and-Play Ethernet

Controller

FEATURES

s Single-Chip IEEE 802.3 Ethernet Controller with

Direct ISA-Bus Interface

s Implements Industry-Standard Plug and Play

s Full Duplex Operation

s Auto-Negotiation of Full and Half duplex Modes

s Recognizes Received Magic Packet™ Frames and

Requests the Processor to Power Up

s Supported by Complete Family of Device Drivers

s Efficient PacketPage™ Architecture Operates in

I/O and Memory Space, and as DMA Slave

s On-Chip RAM Buffers Transmit & Receive Frames

s 10BASE-T Port with Internal Analog Filters

s AUI Port for 10BASE2, 10BASE5 and 10BASE-F

s Programmable Receive Features:

— StreamTransfer

™ for Reduced CPU Overhead

— Auto-Switch Between DMA and On-Chip Memory

— Early Interrupts for Frame Pre-Processing

s Four LED Drivers for Link Status, Full Duplex, and

LAN Activity

s Small 144-pin TQFP package, and minimal exter-

nal components (transformer, crystal and

optional EEPROM)

DESCRIPTION

The CS8920A is a low-cost Ethernet LAN Control-

ler optimized for Industry Standard Architecture

(ISA) Personal Computers. Its highly-integrated

design eliminates the need for costly external com-

ponents required by other Ethernet controllers.

In addition to high integration, the CS8920A offers

a broad range of performance features and config-

uration

options.

Its

unique

PacketPage

architecture automatically adapts to changing net-

work

traffic

patterns

and

available

system

resources. The result is increased system efficien-

cy and minimized CPU overhead.

The CS8920A is available in a thin 144-pin TQFP

package ideally suited for small form-factor, cost-

sensitive Ethernet applications, such as desktop

and portable motherboards. With the CS8920A,

system engineers can design a complete Plug-

and-Play Ethernet circuit that occupies less than

2.0 square inches (14 sq. cm) of board space.

ORDERING INFORMATION

Contact Cirrus to check on the availability of CS8920A

for use in ISA form-factor adapter-card applications.

CS8920A-CQ0 to 70É C

144-pin TQFP

CDK8920A

Developer's Kit

EEPROM

RJ-45

10BASE-T

Attachment

Unit

Interface

(AUI)

20 MHz

XTAL

CS8920 ISA Ethernet Controller

I

S

A

ISA

Bus

Logic

&

Plug

and

Play

EEPROM

Control

RAM

Memory

Manager

802.3

MAC

Engine

and Auto

Negotiation

LED

Control

Clock

Power

Manager

10BASE-T

RX Filters &

Receiver

AUI

Receiver

AUI

Transmitter

AUI

Collision

10BASE-T

TX Filters &

Transmitter

Encoder/

Decoder

&

PLL

SEP ‘97

DS238PP2

Crystal LAN is a trademark of Cirrus Logic, Inc.

Magic Packet is a trademark of Advanced Micro Devices, Inc.

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