AM79C983A datasheet, PDF - EEWORLD Datasheet

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AM79C983A: DescriptionIntegrated Multiport Repeater 2 (IMR2⑩); File Size337KB，60 Pages; ManufacturerAMD; Websitehttp://www.amd.com

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AM79C983A Overview

Integrated Multiport Repeater 2 (IMR2⑩)

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PRELIMINARY

Am79C983A

Integrated Multiport Repeater 2 (IMR2™)

DISTINCTIVE CHARACTERISTICS

Repeater functionality compliant with IEEE

802.3 Repeater Unit speciﬁcations

Hardware implementation of Management

Information Base (MIB) with all of the counters,

attributes, actions, and notiﬁcations speciﬁed

by IEEE 802.3 Section 19

(Layer Management)

Twelve pseudo AUI (PAUI™) ports to support

multiple media types via direct connection to

external transceivers

One IEEE-compliant AUI port

One reversible AUI (RAUI™) port that can be

programmed as a second AUI port or used to

connect directly to a media access controller

(MAC)

Direct interface with the AMD Am79C988A

QuIET™ (Quad Integrated Ethernet Transceiver)

to support 10BASE-T repeater designs

Port switching support to allow individual ports

to be switched between multiple Ethernet

backplanes under software control

Remote Monitoring (RMON) Register Bank to

provide direct support for etherStatsEntry and

etherStatsHistory object groups of the RMON

MIB (IETF RFC1757)

Packet Report Port to provide packet

information for deriving objects in the Host,

HostTopN, and Matrix groups of the RMON MIB

(IETF RFC1578)

Two user-selectable expansion bus modes:

IMR/IMR+ compatible mode and asynchronous

mode

Simple 8-bit microprocessor interface

Full LED support

132-pin PQFP CMOS device with a single 5-V

supply

GENERAL DESCRIPTION

The Am79C983A Integrated Multiport Repeater 2

(IMR2) chip is a VLSI integrated circuit that provides a

system-level solution to designing intelligent (man-

aged) multiport repeaters. When the IMR2 device is

combined with the Quad Integrated Ethernet Trans-

ceiver (QuIET) device, it provides a cost-effective

solution to designing 10BASE-T managed repeaters.

The IMR2 device integrates the repeater functions

speciﬁed by Section 9 (Repeater

Unit)

and Section19

(Layer

Management for 10 Mb/s Baseband Repeaters)

of the IEEE 802.3 standard.

The Am79C983A IMR2 device provides 1 standard

Attachment Unit Interface (AUI) port, 12 Pseudo

Attachment Unit Interface (PAUI) por ts, and 1

Reversible AUI (RAUI) port for direct connection to

a media access controller (MAC). The pseudo AUI

ports can be connected to external transceivers to

support multiple media types, including 10BASE2,

10BASE-T, and 10BASE-FL/FOIRL. The pseudo

AUI ports can be turned off individually (without ex-

ternal circuitry) to allow the switching of transceiver

ports between IMR2 devices. This capability allows

multiple IMR2 devices to be connected to a single

set of transceivers, thus allowing straightforward

implementations of port switching applications.

The IMR2 device also provides a Hardware Imple-

mented Management Information Base (HIMIB™),

which is a super set of the functions provided by the

Am79C987 HIMIB device. All of the necessar y

counters, attributes, actions, and notiﬁcations speci-

ﬁed by Section 19 of the IEEE 802.3 standard are

included in the IMR2 device. To facilitate the design

of managed repeaters, the IMR2 device implements

a simple 8-bit microprocessor interface.

Support for an RMON MIB, as speciﬁed by the Internet

Engineering Task Force (IETF) RFC 1757, is provided.

Direct support is from an RMON Register Bank. Addi-

tional support is provided by the Packet Report Port,

which supplies information that can be used in conjunc-

tion with a microprocessor to derive various RMON

MIB attributes. With systems using multiple IMR2 de-

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

is intended to help you evaluate this product. AMD reserves the right to change or discontinue work on this proposed

product without notice.

Publication#

19879

Rev:

Amendment/0

Issue Date:

April 1997

AM79C983A Related Products

	AM79C983A	Am79C983AKC	Am79C983AKCW
Description	Integrated Multiport Repeater 2 (IMR2⑩)	Integrated Multiport Repeater 2 (IMR2⑩)	Integrated Multiport Repeater 2 (IMR2⑩)
Maker	-	AMD	AMD
Parts packaging code	-	QFP	QFP
package instruction	-	PLASTIC, QFP-132	BQFP,
Contacts	-	132	132
Reach Compliance Code	-	unknown	unknown
JESD-30 code	-	S-PQFP-G132	S-PQFP-G132
length	-	24.13 mm	24.13 mm
Number of functions	-	1	1
Number of terminals	-	132	132
Maximum operating temperature	-	70 °C	70 °C
Package body material	-	PLASTIC/EPOXY	PLASTIC/EPOXY
encapsulated code	-	BQFP	BQFP
Package shape	-	SQUARE	SQUARE
Package form	-	FLATPACK, BUMPER	FLATPACK, BUMPER
Certification status	-	Not Qualified	Not Qualified
Maximum seat height	-	4.57 mm	4.57 mm
Nominal supply voltage	-	5 V	5 V
surface mount	-	YES	YES
technology	-	CMOS	CMOS
Telecom integrated circuit types	-	ETHERNET TRANSCEIVER	ETHERNET TRANSCEIVER
Temperature level	-	COMMERCIAL	COMMERCIAL
Terminal form	-	GULL WING	GULL WING
Terminal pitch	-	0.635 mm	0.635 mm
Terminal location	-	QUAD	QUAD
width	-	24.13 mm	24.13 mm
Base Number Matches	-	1	1

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