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IEEE Std 1284-2000(Revision ofIEEE Std 1284-1994)IEEE Standard Signaling Methodfor a Bidirectional Parallel PeripheralInterface for Personal ComputersSponsorMicroprocessor and Microcomputer Standards Committeeof theIEEE Computer SocietyApproved 21 September 2000IEEE-SA Standards BoardAbstract: A signaling method for asynchronous, fully interlocked, bidirectional parallel communications between hosts and printers or other peripherals is defined. A functional subset of thesignaling method may be implemented on personal computers (PCs) or equivalent parallel porthardware with new software. New electrical interfaces, cabling, and interface hardware thatprovides improved performance while retaining backward compatibility with this subset is detailed.Keywords: bidirectional parallel communications, computers, interfaces, PCs, personalcomputers, printersThe Institute of Electrical and Electronics Engineers, Inc.3 Park Avenue, New York, NY 10016-5997, USACopyright 2000 by the Institute of Electrical and Electronics Engineers, Inc.All rights reserved. Published 24 October 2000. Printed in the United States of America.Print:PDF:ISBN 0-7381-2615-2ISBN 0-7381-2616-0SH94880SS94880No part of this publication may be reproduced in any form, in an electronic retrieval system or otherwise, without the priorwritten permission of the publisher.
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Introduction(This introduction is not a part of IEEE Std 1284-2000, IEEE Standard Signaling Method for a Bidirectional ParallelPeripheral Interface for Personal Computers.)This standard was formally started as an IEEE effort in January 1992, but without the advance work done bya loose alliance of printer manufacturers and printer software developers called the Network PrintingAlliance, this standard would not be possible.The following lists the key contributors to the revision of this standard:Forrest D. Wright, ChairLarry Stein, SecretaryLance Spaulding, EditorDarrell CoxLee FarrellRobert GrossLaurie LassloHideki MorozumiBill MynttiFumio NagasakaDavid RoachBill RussellGreg ShueJerry ThrasherRick Vander WegenCraig WhittleThe following members of the balloting committee voted on this standard:Steven R. BardLon CanadayKeith ChowJames R. DavisSourav K. DuttaEdwin Vivian El-KarehLee FarrellThomas M. KuriharaCopyright 2000 IEEE. All rights reserved.Joseph R. MarshallGene E. MilliganRobert MortonsonKlaus-Dieter MuellerAtsushi NakamuraRoman OrzolGary S. RobinsonDavid RockwellJaideep RoyThomas J. SchaalAkihiro ShimuraLarry SteinJoseph TardoMichael G. ThompsonForrest D. WrightOren Yueniii
When the IEEE-SA Standards Board approved this standard on 21 September 2000, it had the followingmembership:Donald N. Heirman, ChairJames T. Carlo, Vice ChairJudith Gorman, SecretarySatish K. AggarwalMark D. BowmanGary R. EngmannHarold E. EpsteinH. Landis FloydJay Forster*Howard M. FrazierRuben D. GarzonJames W. MooreRobert F. MunznerRonald C. PetersenGerald H. PetersonJohn B. PoseyGary S. RobinsonAkio TojoDonald W. ZipseJames H. GurneyRichard J. HollemanLowell G. JohnsonRobert J. KennellyJoseph L. Koepfinger*Peter H. LipsL. Bruce McClungDaleep C. Mohla*Member EmeritusAlso included is the following nonvoting IEEE-SA Standards Board liaison:Alan Cookson, NIST RepresentativeDonald R. Volzka, TAB RepresentativeGreg KohnIEEE Standards Project EditorivCopyright 2000 IEEE. All rights reserved.
Contents1.Overview. 11.1 Scope. 11.2 Purpose. 12.References. 23.Definitions. 23.1 General terminology . 23.2 Communication modes . 43.3 Operating phases. 44.Features and compliance. 74.14.24.34.44.55.Interface overview . 7Features . 7Device compatibility criteria. 7Device compliance criteria . 8Cable compliance criteria . 9Interface signals . 105.1 HostClk/nWrite (nStrobe): host driven. 105.2 AD1.AD8 (Data1.Data8) . 105.3 PtrClk/PeriphClk/Intr (nAck): peripheral driven . 105.4 PtrBusy/PeriphAck/nWait (busy): peripheral driven. 115.5 AckDataReq/nAckReverse (PError): peripheral driven . 115.6 Xflag (Select): peripheral driven . 115.7 HostBusy/HostAck/nDStrb (nAutoFd): host driven. 125.8 Peripheral Logic High: peripheral driven . 125.9 nReverseRequest (nInit): host driven. 125.10 nDataAvail/nPeriphRequest (nFault): peripheral driven . 135.11 1284 Active/nAStrb (nSelectIn): host driven . 135.12 Host Logic High: host driven. 136.Interface concepts . 146.1 Link level and data level separation. 146.2 IEEE 1284 communication options . 146.3 Nibble Mode/Byte Mode transfer . 156.4 Host-initiated transfers. 156.5 Peripheral-initiated transfers. 156.6 Multiple byte transfers . 156.7 Interface errors . 156.8 Peripheral error resolution . 166.9 ECP Mode command/data . 166.10 EPP Mode addressing . 176.11 Device identification. 18Copyright 2000 IEEE. All rights reserved.v
7.Interface operation . 197.17.27.37.47.57.67.77.88.Power-On . 19Initialization . 19Compatibility Mode . 19Negotiation. 20Peripheral-to-host transfer modes . 28Device ID . 52Termination. 53Collisions . 53Mechanical and electrical interface .
PDF: ISBN 0-7381-2616-0 SS94880 No part of this publication may be reproduced in any form, in an electronic retrieval system or otherwise, without the prior written permission of the publisher. IEEE Std 1284-2000 (Revision of IEEE Std 1284-1994) IEEE Standard Signaling Method for a Bidirectional Parallel Peripheral Interface for Personal Computers Sponsor Microprocessor and Microcomputer .
