1、ANSI INCITS 369-2003for Information Technology SCSI Signal Modeling-2 (SSM-2)ANSIINCITS 369-2003ANSIINCITS 369-2003American National Standardfor Information Technology SCSI Signal Modeling-2 (SSM-2)SecretariatInformation Technology Industry Council (ITI)Approved June 5, 2003American National Standar
2、ds Institute, Inc.AbstractThis standard defines a common methodology for modeling and simulating SCSI systems accurately andconsistantly. It establishes the requirements for the exchange of perfomance information between com-ponents suppliers and system simulators. It defines the acceptable methods
3、for extracting the electricaland perfomance attributes of the constituent parts of the SCSI parallel interface. It establishes a commonmethodolgy for simulating the SCSI physical environment. It is intended to be used in conjunction with therequirements within the SCSI Parallel Interface (SPI-x) fam
4、ily of standards.Approval of an American National Standard requires review by ANSI that therequirements for due process, consensus, and other criteria for approval havebeen met by the standards developer.Consensus is established when, in the judgement of the ANSI Board ofStandards Review, substantia
5、l agreement has been reached by directly andmaterially affected interests. Substantial agreement means much more thana simple majority, but not necessarily unanimity. Consensus requires that allviews and objections be considered, and that a concerted effort be madetowards their resolution.The use of
6、 American National Standards is completely voluntary; theirexistence does not in any respect preclude anyone, whether he has approvedthe standards or not, from manufacturing, marketing, purchasing, or usingproducts, processes, or procedures not conforming to the standards.The American National Stand
7、ards Institute does not develop standards andwill in no circumstances give an interpretation of any American NationalStandard. Moreover, no person shall have the right or authority to issue aninterpretation of an American National Standard in the name of the AmericanNational Standards Institute. Req
8、uests for interpretations should beaddressed to the secretariat or sponsor whose name appears on the titlepage of this standard.CAUTION NOTICE: This American National Standard may be revised orwithdrawn at any time. The procedures of the American National StandardsInstitute require that action be ta
9、ken periodically to reaffirm, revise, orwithdraw this standard. Purchasers of American National Standards mayreceive current information on all standards by calling or writing the AmericanNational Standards Institute.American National StandardPublished byAmerican National Standards Institute, Inc.25
10、 West 43rd Street, New York, NY 10036Copyright 2003 by Information Technology Industry Council (ITI)All rights reserved.No part of this publication may be reproduced in anyform, in an electronic retrieval system or otherwise,without prior written permission of ITI, 1250 Eye Street NW, Washington, DC
11、 20005. Printed in the United States of AmericaCAUTION: The developers of this standard have requested that holders of patents that may berequired for the implementation of the standard disclose such patents to the publisher. However,neither the developers nor the publisher have undertaken a patent
12、search in order to identifywhich, if any, patents may apply to this standard. As of the date of publication of this standardand following calls for the identification of patents that may be required for the implementation ofthe standard, no such claims have been made. No further patent search is con
13、ducted by the de-veloper or publisher in respect to any standard it processes. No representation is made or impliedthat licenses are not required to avoid infringement in the use of this standard.iPageForeword . ivIntroduction. vii1 Scope .12 References .22.1 Overview .22.2 Approved references .22.3
14、 References under development 23 Definitions, acronyms, symbols, abbreviations, keywords, and conventions .33.1 Definitions .33.2 Acronyms 93.3 Symbols and abbreviations .103.4 Keywords 113.5 Conventions 114 General .134.1 Overview .134.2 Signal modeling purposes .144.2.1 Overview 144.2.2 Physical c
15、omponents and signals 144.2.2.1 Relationship between physical and modeling terminology 144.2.2.2 Elemental components 144.2.2.3 Composite components 154.2.2.4 Systems 154.2.2.5 Signals and measurement points 154.2.2.6 Run length dependent driver signals .164.2.2.7 Interactions between signals on dif
16、ferent signal lines .164.2.3 Viewpoints .174.3 Application to measurement 194.4 Practical considerations for creating models .204.5 Relationship between components of the modeling environment .214.6 Relationship between signal specifications in standards and modeling 224.7 Accuracy and model validat
17、ion considerations .225 Methodologies 235.1 Overview .235.2 Behavioral .235.2.1 IBIS 235.2.1.1 Overview .235.2.1.2 IBIS model creation .245.2.1.3 Pre-modeling activities 245.2.1.4 Data extraction 265.2.1.5 Creating the IBIS file .325.2.1.6 IBIS model validation 405.2.1.7 IBIS model verification 405.
18、2.1.8 Acceptance criteria 415.2.2 Maxwell matrices 425.2.2.1 Overview .425.2.2.2 Empirical extraction .425.2.2.3 Validation 435.2.3 Theoretical extraction .435.2.4 Interpreting Maxwell matrices 445.3 Circuit models .456 Models 476.1 Overview .476.2 General requirements .476.2.1 Applicability 47Conte
19、ntsPageii6.2.2 Documentation .476.2.3 Model name .486.2.4 Model class 486.2.5 Model boundary .486.2.6 Model limitations or dependencies .486.2.7 Model creation methodology 496.2.7.1 Model creation stimuli .496.2.7.2 Amplitude and timing .496.2.7.3 Frequency range .496.2.7.4 Rise time .496.2.8 Model
20、validation .506.2.8.1 Accuracy requirements .506.2.8.2 Model validation stimuli .506.2.8.3 Amplitude and timing .506.2.8.4 Frequency range .516.2.8.5 Rise time .516.2.9 Model support contact information .516.2.10 License agreement .516.3 Interconnect component models .516.3.1 Overview 516.3.2 Cables
21、 516.3.2.1 Description 516.3.2.2 Model boundary 526.3.2.3 Model class .526.3.2.4 Connectors 536.3.3 Printed circuit boards .546.3.3.1 Model boundary 546.3.4 Model class 546.3.4.1 Methodology 556.3.4.2 Validation 556.4 Devices .566.4.1 Overview 566.4.2 Transceivers .566.4.2.1 Model boundary 566.4.2.2
22、 Model class .566.4.2.3 Methodology 566.4.2.4 Validation 566.4.3 Terminators 566.4.3.1 Description 566.4.3.2 Model boundary 566.4.3.3 Model class .566.4.3.4 Description 576.4.4 Methodolog 606.4.5 Validation .606.5 Instrumentation models .616.5.1 Description .616.5.2 Model boundary .616.5.3 Model Cla
23、ss .616.5.4 Probe models .626.5.4.1 Models for Agilent active probe (probe tip) .626.5.4.2 Models for Agilent active differential probe (probe tip) 636.5.5 Methodology .646.5.6 Correlation accuracy 647 Standard model constructions 657.1 Host bus adapter / target board 657.1.1 Description .65iiiPage7
24、.1.2 Model boundary .657.1.3 Model class 657.1.3.1 Methodology 657.2 Cable assemblies 667.2.1 Description .667.2.2 Model boundary .667.2.3 Model class 667.2.4 Methodology .667.2.5 Validation .667.2.6 Correlation accuracy 667.3 Backplane .667.3.1 Description .667.3.2 Model boundary .677.3.3 Model cla
25、ss 677.3.4 Methodology .677.4 System models 677.4.1 SCSI System Model Example 677.4.2 Simulation Overview 677.4.3 Details of Simulation 698 Measurement and validation 718.1 Measurement points 718.1.1 Physical measurement points 718.1.1.1 Transceiver .718.1.1.2 Terminator .718.1.1.3 Transceiver board
26、 .718.1.1.4 Transceiver board assembly .718.1.1.5 Cable assemblies (media, transitions, connectors) .718.1.2 Device connector .718.1.3 Chip to board interface .718.1.4 Terminator connector .718.2 Acceptance criteria 718.3 Model Validation Procedure 728.3.1 Overview 728.3.2 Transceiver 728.3.3 Bulk C
27、able 728.3.4 Cable assemblies .728.3.5 Transceiver boards, target boards, and backplanes 728.4 System model validation procedure 739 Simulation strategy .749.1 System configuration .749.2 Data patterns .749.2.1 Overview 749.2.1.1 TDT DATA IN phase training pattern 759.2.1.2 DATAOUT phase training pa
28、ttern .779.3 Data rates 799.4 Instrumentation models .79AnnexesA Resources81ivForeword (This foreword is not part of ANSI INCITS 369-2003.)This standard defines a common methodology for modeling and simulating SCSIsystems accurately and consistently. It establishes the requirements for the ex-change
29、 of performance information between components suppliers and system sim-ulators. It defines the acceptable methods for extracting the electrical andperformance attributes of the constituent parts of the SCSI parallel interface. It estab-lishes a common methodology for simulating the SCSI physical en
30、vironement. It is in-tended to be used in conjunction with the requirements within the SCSI ParallelInterface (SPI-x) family of standards.Requests for interpretation, suggestions for improvement and addenda, or defect re-ports are welcome. They should be sent to the INCITS Secretariat, ITI, 1250 Eye
31、Street, NW, Suite 200, Washington, DC 20005-3922.This Standard was processed and approved for submittal to ANSI by National Com-mittee for Information Technology Standards (INCITS). Committee approval of thisStandard does not necessarily imply that all committee members voted for approval.At the tim
32、e it approved this Standard, INCITS had the following members:Karen Higginbottom, ChairJennifer Garner, SecretaryOrganization Represented Name of RepresentativeApple Computer, Inc. David MichaelWanda Cox (Alt.)Farance, Inc Frank FaranceRichard Lutz (Alt.)Hewlett-Packard Company. Karen HigginbottomSc
33、ott Jameson (Alt.)Steve Mills (Alt.)EIA Edward Mikoski, Jr.Judith Anderson (Alt.)Suan Hoyler (Alt.)IBM Corporation Ronald F. SillettiInstitute for Certification of Computer Professionals. Kenneth M. ZemrowskiThomas Kurihara (Alt.)IEEE Judith GormanRichard Holleman (Alt.)Robert Pritchard (Alt.)Intel
34、Corporation . Gregory KisorDave Thewlis (Alt.)Microsoft Corporation . Mike KsarJoseph Zajaczkowski (Alt.)National Institute of Standards - Clause 2 enumerates the normative references that apply to this standard;- Clause 3 describes the definitions, symbols, conventions and abbreviationsused in this
35、 report;- Clause 4 provides a general overview of the concepts within this report;- Clause 5 describes the modeling methodologies;- Clause 6 describes the model characteristics;- Clause 7 describes model assembliages;- Clause 8 describes the measurement and validation methodologies;- Clause 9 descri
36、bes the simulation strategies;Annexes A, B, and C form an integral part of this Standard.ANSI INCITS 369-200311 ScopeThis Standard establishes a common methodology for SCSI system signal modeling. Using thismethodology, SCSI systems may be modeled accurately and consistently. This Standard establish
37、es therequirements for the exchange of signal performance information between component suppliers, systemintegrators, and those carrying-out simulations. This Standard defines the acceptable methods forextracting the electrical and signal performance attributes of the constituent parts of a SCSI bus
38、 segment.This Standard establishes the acceptable methods for modeling these parts. It shall be used in conjunctionwith the requirements within the SCSI Parallel Interface (SPI-x) family of standards.The objectives of the SCSI Signal Modeling (SSM-2) Standard are to:a) create a framework that shows
39、how SCSI signal modeling fits within the context of a SCSI bus segment,b) define the modeling parameters of the component sets,c) define a set of elemental components of the SCSI parallel interface,d) define a set of composite components of the SCSI parallel interface,e) define the interface boundar
40、ies of the component sets,f) define the general signal modeling methodologies that apply to the SCSI parallel interface,g) define the only acceptable model types and formats for the exchange of performance information andmodel structure for each component,h) define the methodology for translating be
41、tween physical measurements and necessary modelingparameters, andi) define a method for the exchange of information between component suppliers and system integrators. AMERICAN NATIONAL STANDARD ANSI INCITS 369-2003American National Standard for Information Technology SCSI Signal Modeling-2 (SSM-2)A
42、NSI INCITS 369-200322 References2.1 OverviewThe documents named in this section contain provisions which, through reference in this text, constituteprovisions of this document. At the time of publication, the editions indicated were valid. Parties using thisdocument are encouraged to investigate the
43、 possibility of applying the most recent editions of thestandards indicated below.SCSI clause Approved ANSI standards;Approved and draft regional and international standards (ISO, IEC, CEN/CENELEC and ITUT); andApproved foreign standards (including BIS, JIS and DIN).2.2 Approved referencesANSI Stand
44、ard X3.302:1998, SCSI Parallel Interface 2 (SPI-2)1)EIA-656-A-1999, I/O Buffer Information Specification2)IEEE Std 100-1996, IEEE Standard Dictionary of Electrical and Electronic Terms3)INCITS.336:2000, SCSI Parallel Interface - 3 (SPI-3)4)INCITS TR-23:1999, Enhanced Parallel Interface (EPI)4)INCITS
45、.362-200x, SCSI Parallel Interface - 4 (SPI-4)4)2.3 References under developmentT10/1439-DT Passive Interconnect Performance (PIP)T10/1525-D SCSI Parallel Interface - 5 (SPI-5)1)Available from the ANSI Customer Service Department by telephone at (212) 642-4900, by FAX at (212) 302-1286 or via the wo
46、rld wide web at http:/www.ansi.org.2)Available from the Electronic Industries Alliance, 2500 Wilson Boulevard, Arlington, VA 22201-3834.3)Available from the Institute of Electrical and Electronic Engineers, Inc. 445 Hoes Lane, PO Box1331, Piscataway, NJ 08855-1331 USA.4)Available from Global Enginee
47、ring at (303) 792-2181 or the INCITS Secretariat, 1250 Eye Street, NW Suite 200, Washington, DC 20005.ANSI INCITS 369-200333 Definitions, acronyms, symbols, abbreviations, keywords, and conventions3.1 Definitions3.1.1 Precedence of Definitions Authority: The precedence of authority for definitions i
48、n this section are:1) IEEE Standard Dictionary of Electrical and Electronic Terms3)2) National Committee for Information Technology Standards Draft American National StandardDictionary for Information Technology5)3) ANSI X3.302:1998, SCSI Parallel Interface - 2 (SPI-2)1)3.1.2 Accuracy: The quality o
49、f freedom from mistake or error. The degree of correctness with which ameasured value agrees with the true value. Not to be confused with precision - see 3.1.77.3.1.3 Admittance: In an n-terminal network, the complex current flowing to the i-th terminal divided by thecomplex voltage applied between the j-th terminal with respect to the reference point when all otherterminals have arbitrary terminations. The inverse of impedance.3.1.4 American Wire Gauge: Formerly the Brown that is, the interference is induced in the signal system by anelectric field produced by the interfering source.5
