IEC INTERNATIONAL STANDARD 61523-3 First edition 2004-09 IEEE 1497TM Delayandpowercalculationstandards: Part 3: Standard Delay Format (SDF) for the electronic design process IEC Reference number IEEE IEC 61523-3(E):2004 IEEE Std. 1497(E):2001 Publication numbering As from1 January 1997 all IEC publications are issued with a designation in the Consolidated editions The IEC is now publishing consolidated versions of its publications. For example, edition numbers 1.0, 1.1 and 1.2 refer, respectively, to the base publication, the amendments 1and 2. FurtherinformationonIECpublications The technical content of IEC publications is kept under constant review by the IEC, thus ensuring that the content reflects current technology. Information relating to this.publication,including itsvalidity, is available in the IEC Catalogue of information on the subjects under consideration and work in progress undertaken by the technical committee which has prepared this publication, as well as the list of publications issued, is also available from the following: IEc Web Site (www.iec.ch) Catalogue of IEC publications The on-line catalogue on the IEC web site (www.iec.ch/searchpub) enables you to search by a variety of criteria including text searches, technical committees and date of publication. On-line information is also available on recently issued publications, withdrawn and replaced publications, as well as corrigenda. IECJust Published This summary of recently issued publications (www.iec.ch/online news/ justpub) is also available by, email. Please contact the Customer Service Centre (see below) for further information. CustomerService Centre If you have any questions regarding this publication or need further assistance, please contactthe Customer Service Centre: Email: [email protected] Tel: +41 22 919 0211 +41229190300 Fax: IEC INTERNATIONAL STANDARD 61523-3 First edition 2004-09 IEEE 1497TM Delayandpowercalculationstandards- Part 3: Standard Delay Format (SDF) for the electronic design process IEEE2004—Copyright-all rights reserved IEEE is a registered trademark in the U.S. Patent & Trademark Office, owned by the Institute of Electrical and Electronics Engineers, Inc. No part of this publication may be reproduced or utilized in any form or by any means, electronic or mechanical, including photocopying and'microfilm, without permission in writing from the publisher. International Electrotechnical Commission, 3, rue de Varembe, PO Box 131, CH-1211 Geneva 20, Switzerland Telephone: +41 22 919 02 11 Telefax: +41 22 919 03 00 E-mail: [email protected]: www.iec.ch The Institute of Electrical and Electronics Engineers, Inc, 3 Park Avenue, New York, NY 10016-5997, USA IEC Commission Electrotechnique Internationale International Electrotechnical Commission MexAyHapoAHag nekTpoTexHMyeckan KoMcMs - 2 - IEC61523-3:2004(E) IEEE1497-2001(E) CONTENTS FOREWORD IEEE Introduction... 1. Overview.... 1.1 Scope. 1.2 Organization of this standard 2. 3. Conventions 3.1 Terminology conventions.. 3.2 Syntactic conventions. 4. SDF in the design process 12 4.1 Sharing of timing data..... 12 4.2 Using multiple SDF files in one design. 12 4.3Timing data and constraints. 13 4.4 Timing environments.. 13 4.5 Back-annotation oftimingdatafor design analysis. 4.6 Forward-annotation of timing constraints for design synthesis.. 4.7 Timing models supported by SDF... .16 5. Defining the standard delay format.. 5.1SDFfilecontent. 18 5.2 Header section. 5.3 Cells. 25 5.4 Delays.. .28 5.5Timing checks 46 5.6 Labels... .60 5.7 Timing environment. AnnexA(normative)SyntaxofSDF .74 AnnexB (informative)SDFfile examples. .84 Annex C(informative)List of Participants 89 Published by IEC under licence from IEEE. @ 2004 IEEE. All rights reserved. 3 - IEC 61523-3:2004(E) IEEE1497-2001(E) INTERNATIONALELECTROTECHNICALCOMMISSION DELAYANDPOWERCALCULATIONSTANDARDS- Part 3:StandardDelayFormat(SDF) fortheelectronicdesignprocess FOREWORD The International Electrotechnical Commission (IEC) is a wo