am79c970 Advanced Micro Devices, am79c970 Datasheet

am79c970

Manufacturer Part Number

am79c970

Description

Pcnettm-pci Single-chip Ethernet Controller For Pci Local Bus

Manufacturer

Advanced Micro Devices

Datasheet

1.AM79C970.pdf (168 pages)

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Am79C970

PCnet

DISTINCTIVE CHARACTERISTICS

GENERAL DESCRIPTION

The PCnet-PCI single-chip 32-bit Ethernet controller is

a highly integrated Ethernet system solution designed to

address high-performance system application require-

ments. It is a flexible bus-mastering device that can be

used in any application, including network-ready PCs,

printers, fax modems, and bridge/router designs. The

bus-master architecture provides high data throughput

in the system and low CPU and system bus utilization.

The PCnet-PCI controller is fabricated with AMD’s ad-

vanced low-power CMOS process to provide low oper-

ating and standby current for power sensitive

applications.

1-868

Single-chip Ethernet controller for the Periph-

eral Component Interconnect (PCI) local bus

Supports ISO 8802-3 (IEEE/ANSI 802.3) and

Ethernet Standards

Direct interface to the PCI local bus

Compliant to PCI local bus specification

(Revision 2.0)

Software compatible with AMD’s Am7990

LANCE, Am79C90 C-LANCE, Am79C960

PCnet-ISA, Am79C961 PCnet-ISA

PCnet-32, and Am79C900 ILACC

descriptor architecture

Compatible with Am2100/Am1500T and Novell

NE2100/NE1500

driver

software

High-performance Bus Master architecture with

integrated DMA Buffer Management Unit for

low CPU and bus utilization

Big endian byte alignment supported

Single +5 V power supply operation

Low-power, CMOS design with sleep modes

allows reduced power consumption for critical

battery powered applications and Green PCs

Microwire

jumperless design

Individual 136-byte transmit and 128-byte

receive FIFOs provide frame buffering for

increased system latency, and support the

following features:

PRELIMINARY

This document contains information on a product under development at Advanced Micro Devices, Inc.

The information is intended to help you to evaluate this product. AMD reserves the right to change or

discontinue work on this proposed product without notice.

-PCI Single-Chip Ethernet Controller for PCI Local Bus

EEPROM interface supports

, Am79C965

The PCnet-PCI controller is a complete Ethernet node

integrated into a single VLSI device. It contains a bus in-

terface unit, a DMA buffer management unit, an IEEE

802.3-defined Media Access Control (MAC) function, in-

dividual 136-byte transmit and 128-byte receive FIFOs,

an IEEE 802.3-defined Attachment Unit Interface (AUI)

and Twisted-Pair Transceiver Media Attachment Unit

(10BASE-T MAU), and a Microwire EEPROM interface.

The PCnet-PCI controller is also register compatible

with the LANCE (Am7990) Ethernet controller, the

C-LANCE (Am79C90) Ethernet controller, the ILACC

(Am79C900) Ethernet controller, and all Ethernet

— Automatic retransmission with no FIFO

— Automatic receive stripping and transmit

— Automatic runt packet rejection

— Automatic deletion of received collision frames

Look-Ahead Packet Processing (LAPP)

concept allows protocol analysis to begin

before end of receive frame

Integrated Manchester Encoder/Decoder

Provides integrated Attachment Unit Interface

(AUI) and 10BASE-T transceiver with automatic

port selection

Automatic Twisted-Pair receive polarity detec-

tion and automatic correction of the receive

polarity

Optional byte padding to long-word boundary

on receive

Dynamic transmit FCS generation programma-

ble on a frame-by-frame basis

Internal/external loopback capabilities

Supports the following types of network

interfaces:

— AUI to external 10BASE2, 10BASE5,10BASE-T

— Internal 10BASE-T transceiver with Smart

NAND Tree test mode for connectivity testing

on printed circuit boards

132-pin PQFP package

reload

padding (individually programmable)

or 10BASE-F MAU

Squelch to Twisted-Pair medium

Publication# 18220

Issue Date: June 1994

Rev. C

Advanced

Devices

Amendment /0

Micro

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