AM79C970A Advanced Micro Devices, AM79C970A Datasheet

AM79C970A

Manufacturer Part Number

AM79C970A

Description

PCnet-PCI II Single-Chip Full-Duplex Ethernet Controller for PCI Local Bus Product

Manufacturer

Advanced Micro Devices

Datasheet

1.AM79C970A.pdf (219 pages)

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Am79C970A

PCnet

for PCI Local Bus Product

DISTINCTIVE CHARACTERISTICS

GENERAL DESCRIPTION

The 32-bit PCnet-PCI II single-chip full-duplex Ethernet

controller is a highly integrated Ethernet system solution

designed to address high-performance system applica-

tion requirements. It is a flexible bus-mastering device

that can be used in any application, including network-

ready PCs, printers, fax modems, and bridge/router de-

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.

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 (Revision

2.0 compliant)

High-performance 32-bit Bus Master architec-

ture with integrated DMA buffer Management

Unit for low CPU and bus utilization

Software compatible with AMD PCnet Family,

LANCE/C-LANCE, and Am79C900 ILACC regis-

ter and descriptor architecture

Compatible with PCnet Family driver software

Full-duplex operation for increased network

bandwidth

Big endian and little endian byte alignments

supported

3.3 V/5 V signaling for PCI bus interface

Low-power CMOS design with two sleep

modes allows reduced power consumption for

critical battery powered applications and Green

PCs

Integrated Magic Packet

wake up of Green PCs

Individual 272-byte transmit and 256-byte re-

ceive FIFOs provide frame buffering for in-

creased system latency and support the

following features:

— Automatic retransmission with no FIFO reload

— Automatic receive stripping and transmit pad-

— Automatic runt frame rejection

— Automatic selection of received collision frames

Microwire EEPROM interface supports

jumperless design and provides through-chip

programming

ding (individually programmable)

PRELIMINARY

-PCI II Single-Chip Full-Duplex Ethernet Controller

support for remote

signs. The bus-master architecture provides high data

throughput in the system and low CPU and system bus

utilization. The PCnet-PCI II controller is fabricated with

AMD’s advanced low-power CMOS process to

provide low operating and standby current for power

sensitive applications.

Supports optional Boot PROM for diskless

node applications

Look-Ahead Packet Processing (LAPP) data

handling technique reduces system overhead

by allowing 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 inter-

faces:

— AUI to external 10BASE2, 10BASE5,

— Internal 10BASE-T transceiver with Smart

JTAG Boundary Scan (IEEE 1149.1) test access

port interface and NAND Tree test mode for

board-level production connectivity test

Supports LANCE General Purpose Serial Inter-

face (GPSI)

Supports External Address Detection Interface

(EADI)

4 programmable LEDs for status indication

132-pin PQFP package

10BASE-T or 10BASE-F MAU

Squelch to Twisted-Pair medium

Publication# 19436

Issue Date: April 1995

Rev. A

Advanced

Devices

Amendment /+1

Micro

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