AM79C976 datasheet(2/309 Pages) AMD

2 / 309 page

Am79C976

8/01/00

P R E L I M INARY

s Dual-speed CSMA/CD (10 Mbps and 100 Mbps)

Media Access Controller (MAC) compliant with

IEEE/ANSI 802.3 and Blue Book Ethernet

standards

s Programmable internal/external loopback

capabilities

s Supports patented External Address Detection

Interface (EADI) with receive frame tagging

support for internetworking applications

s EEPROM interface supports jumperless design

and provides through-chip programming

— Supports full programmability of all internal

registers through EEPROM mapping

s Programmable PHY reset output pin capable of

resetting external PHY without needing

buffering

s Integrated oscillator circuit is controlled by

external crystal

s Extensive programmable LED status support

s Supports up to 16 Mbyte optional Boot PROM or

Flash for diskless node application

s Look-Ahead Packet Processing (LAPP) data

handling technique reduces system overhead

by allowing protocol analysis to begin before

the end of a receive frame

s Optional delayed interrupt feature reduces CPU

overhead

s Programmable Inter Packet Gap (IPG) to

address less aggressive network MAC

controllers

s Offers the Modified Back-Off algorithm to

address the Ethernet Capture Effect

s Optionally sends and receives non-standard

frames of up to 64K octets in length

s IEEE 1149.1-compliant JTAG Boundary Scan

test access port interface for board-level

production connectivity test

s Provides built-in self test (MBIST) for the

external SSRAM

s Software compatible with AMD PCnet Family

and LANCE/C-LANCE register and descriptor

architecture

s Compatible with the existing PCnet Family

driver and diagnostic software (except for

statistics)

s Available in 208-pin PQFP package

s +3.3-V power supply with 5-V tolerant I/Os

enables broad system compatibility

s Support for operation in Industrial temperature

range (-40° C to +85

C) available.

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