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CS8900-CQ

Highly-Integrated ISA Ethernet Controller

Cirrus Logic 

CS8900

Highly-Integrated ISA Ethernet Controller

Features

• Single-Chip IEEE 802.3 Ethernet Controller with

Direct ISA-Bus Interface

• Efficient PacketPageTM Architecture Operates in I/O

and Memory Space, and as DMA Slave

• Full Duplex Operation

• On-Chip RAM Buffers Transmit & Receive Frames

• 10BASE-T Port with Analog Filters, Provides:

- Automatic Polarity Detection and Correction

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

• Programmable Transmit Features:

- Automatic Re-transmission on Collision

- Automatic Padding and CRC Generation

• Programmable Receive Features:

- StreamTransferTM for Reduced CPU Overhead

- Auto-Switch Between DMA and On-Chip Memory

- Early Interrupts for Frame Pre-Processing

- Automatic Rejection of Erroneous Packets

• EEPROM Support for Jumperless Configuration

• Boot PROM Support for Diskless Systems

• Boundary Scan and Loopback Test

• LED Drivers for Link Status and LAN Activity

• Standby and Suspend Sleep Modes

Description

The CS8900 is a low-cost Ethernet LAN Controller op-

timized for Industry Standard Architecture (ISA) Per-

sonal Computers. Its highly-integrated design elimi-

nates the need for costly external components required

by other Ethernet controllers. The CS8900 includes

on-chip RAM, 10BASE-T transmit and receive filters,

and a direct ISA-Bus interface with 24 mA Drivers.

In addition to high integration, the CS8900 offers a

broad range of performance features and configuration

options. Its unique PacketPage architecture automat-

ically adapts to changing network traffic patterns and

available system resources. The result is increased

system efficiency and minimized CPU overhead.

The CS8900 is available in a thin 100-pin TQFP pack-

age ideally suited for small form-factor, cost-sensitive

Ethernet applications, such as desktop and portable

motherboards and adapters. With the CS8900, system

engineers can design a complete Ethernet circuit that

occupies less than 1.5 square inches (10 sq. cm) of

board space.

ORDERING INFORMATION:

CS8900-CQ 0 to 70° C

CRD8900-1

100-pin TQFP

Evaluation Kit

EEPROM

20 MHz

XTAL

CS8900 ISA Ethernet Controller

EEPROM

Control

RAM

LED

Control

Clock

10BASE-T

RX Filters &

Receiver

I

ISA

S

Bus

A

Logic

Encoder/

Decoder

&

PLL

10BASE-T

TX Filters &

Transmitter

AUI

Transmitter

Memory

Manager

802.3

MAC

Engine

Boundary

Scan

Test Logic

Power

Manager

AUI

Collision

AUI

Receiver

RJ-45 10BASE-T

Attachment

Unit

Interface

(AUI)

Preliminary Product Information

This document contains information for a new product. Crystal

Semiconductor reserves the right to modify this product without notice.

Crystal Semiconductor Corporation

P.O. Box 17847, Austin, TX 78760

(512) 445-7222 Fax: (512) 445-7581

Copyright © Crystal Semiconductor Corporation 1995

(All Rights Reserved)

DEC ’95

DS150PP2

1

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