CS8920A Datasheet, PDF (1/144 Pages) Cirrus Logic – CRYSTAL LAN ISA PLUG-AND-PLAY ETHERNET CONTROLLER

CS8920A
Advanced Product Databook
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)
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
&U\VWDO /$1^TM ISA
Plug-and-Play Ethernet
Controller
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.
Crystal LAN is a trademark of Cirrus Logic, Inc.
Magic Packet is a trademark of Advanced Micro Devices, Inc.
EEPROM
20 MHz
XTAL
CS8920 ISA Ethernet Controller
EEPROM
Control
RAM
LED
Control
Clock
10BASE-T
RX Filters &
Receiver
ISA
Bus
I
Logic
S
&
A
Plug
and
Encoder/
Decoder
&
PLL
10BASE-T
TX Filters &
Transmitter
AUI
Play
802.3
Transmitter
Memory
Manager
MAC
Engine
and Auto
Negotiation
Power
Manager
AUI
Collision
AUI
Receiver
RJ-45 10BASE-T
Attachment
Unit
Interface
(AUI)
SEP ‘97
Copyright © Cirrus Logic, Inc. 1997
(All Rights Reserved)
DS238PP2