1、Information technology Small computer system interface (SCSI) Part 112:Parallel Interface-2 (SPI-2)Reference numberISO/IEC 14776-112:2002(E)National Standard of CanadaCAN/CSA-ISO/IEC 14776-112:04(ISO/IEC 14776-112:2002)International Standard ISO/IEC 14776-112:2002 (first edition, 2002-05) has been a
2、dopted without modification(IDT) as CSA Standard CAN/CSA-ISO/IEC 14776-112:04, which has been approved as a National Standard of Canadaby the Standards Council of Canada.ISBN 1-55397-358-5 January 2004The Canadian Standards Association (CSA), The Standards Council of Canada is theunder whose auspice
3、s this National Standard has been coordinating body of the National Standards system, produced, was chartered in 1919 and accredited by a federation of independent, autonomousthe Standards Council of Canada to the National organizations working towards the furtherStandards system in 1973. It is a no
4、t-for-profit, development and improvement of voluntarynonstatutory, voluntary membership association standardization in the national interest.engaged in standards development and certification The principal objects of the Council are to foster activities. and promote voluntary standardization as a m
5、eans CSA standards reflect a national consensus of of advancing the national economy, benefiting theproducers and users including manufacturers, health, safety, and welfare of the public, assisting consumers, retailers, unions and professional and protecting the consumer, facilitating domestic organ
6、izations, and governmental agencies. The and international trade, and furthering internationalstandards are used widely by industry and commerce cooperation in the field of standards.and often adopted by municipal, provincial, and A National Standard of Canada is a standard whichfederal governments
7、in their regulations, particularly in has been approved by the Standards Council ofthe fields of health, safety, building and construction, Canada and one which reflects a reasonableand the environment. agreement among the views of a number of capableIndividuals, companies, and associations across i
8、ndividuals whose collective interests provide to theCanada indicate their support for CSAs standards greatest practicable extent a balance ofdevelopment by volunteering their time and skills to representation of producers, users, consumers, andCSA Committee work and supporting the Associations other
9、s with relevant interests, as may be appropriateobjectives through sustaining memberships. The more to the subject in hand. It normally is a standardthan 7000 committee volunteers and the 2000 which is capable of making a significant and timelysustaining memberships together form CSAs total contribu
10、tion to the national interest.membership from which its Directors are chosen. Approval of a standard as a National Standard ofSustaining memberships represent a major source of Canada indicates that a standard conforms to theincome for CSAs standards development activities. criteria and procedures e
11、stablished by the StandardsThe Association offers certification and testing Council of Canada. Approval does not refer to theservices in support of and as an extension to its technical content of the standard; this remains thestandards development activities. To ensure the continuing responsibility
12、of the accreditedintegrity of its certification process, the Association standards-development organization.regularly and continually audits and inspects products Those who have a need to apply standards arethat bear the CSA Mark. encouraged to use National Standards of CanadaIn addition to its head
13、 office and laboratory complex whenever practicable. These standards are subject in Toronto, CSA has regional branch offices in major to periodic review; therefore, users are cautioned centres across Canada and inspection and testing to obtain the latest edition from the organizationagencies in eigh
14、t countries. Since 1919, the preparing the standard.Association has developed the necessary expertise to The responsibility for approving National Standards meet its corporate mission: CSA is an independent of Canada rests with theservice organization whose mission is to provide an Standards Council
15、 of Canadaopen and effective forum for activities facilitating the 270 Albert Street, Suite 200exchange of goods and services through the use of Ottawa, Ontario, K1P 6N7standards, certification and related services to meet Canadanational and international needs.For further information on CSA service
16、s, write toCanadian Standards Association5060 Spectrum Way, Suite 100Mississauga, Ontario, L4W 5N6CanadaAlthough the intended primary application of this Standard is stated in its Scope, it is importantto note that it remains the responsibility of the users to judge its suitability for their particu
17、lar purpose.Registered trade-mark of Canadian Standards AssociationCAN/CSA-ISO/IEC 14776-112:04 interface (SCSI) Part 112: Parallel Interface-2 (SPI-2)Information technology Small computer systemJanuary 2004 Canadian Standards Association CSA/1CAN/CSA-ISO/IEC 14776-112:04Information technology Small
18、computer system interface (SCSI) Part 112: Parallel Interface-2 (SPI-2)CSA PrefaceStandards development within the Information Technology sector is harmonized with internationalstandards development. Through the CSA Technical Committee on Information Technology (TCIT),Canadians serve as the Canadian
19、 Advisory Committee (CAC) on ISO/IEC Joint Technical Committee 1 onInformation Technology (ISO/IEC JTC1) for the Standards Council of Canada (SCC), the ISO memberbody for Canada and sponsor of the Canadian National Committee of the IEC. Also, as a member of theInternational Telecommunication Union (
20、ITU), Canada participates in the International Telegraph andTelephone Consultative Committee (ITU-T).This International Standard was reviewed by the CSA TCIT under the jurisdiction of the StrategicSteering Committee on Information Technology and deemed acceptable for use in Canada. (Acommittee membe
21、rship list is available on request from the CSA Project Manager.) From time to time,ISO/IEC may publish addenda, corrigenda, etc. The CSA TCIT will review these documents for approvaland publication. For a listing, refer to the CSA Information Products catalogue or CSA Info Update orcontact a CSA Sa
22、les representative. This Standard has been formally approved, without modification, bythe Technical Committee and has been approved as a National Standard of Canada by the StandardsCouncil of Canada.January 2004 Canadian Standards Association 2004All rights reserved. No part of this publication may
23、be reproduced in any form whatsoever without the prior permission ofthe publisher. ISO/IEC material is reprinted with permission. Where the words “this International Standard” appear in thetext, they should be interpreted as “this National Standard of Canada”. Inquiries regarding this National Stand
24、ard of Canada should be addressed to Canadian Standards Association 5060 Spectrum Way, Suite 100, Mississauga, Ontario, Canada L4W 5N6 1-800-463-6727 416-747-4044www.csa.caINTERNATIONALSTANDARDISO/IEC14776-112First edition2002-05Information technology Small computer system interface (SCSI) Part 112:
25、Parallel Interface-2 (SPI-2) ISO/IEC 2002All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized in any form or by anymeans, electronic or mechanical, including photocopying and microfilm, without permission in writing from the publisher.ISO/IEC Cop
26、yright Office Case postale 56 CH-1211 Genve 20 SwitzerlandXDFor price, see current cataloguePRICE CODE14776-112 ISO/IEC:2002(E)ii SCSI Parallel Interface-2 ContentsPageIntroduction xiv1 Scope .12 Normative references .22.1 Normative references 22.2 Approved references .22.3 References under developm
27、ent 33 Definitions, symbols, abbreviations, and conventions 33.1 Definitions .33.2 Symbols and abbreviations .113.3 Keywords 113.4 Conventions 123.5 Notation for Procedures and Functions .134 General .144.1 Overview .144.1.1 Data transfer modes .144.1.2 Cables, Connectors, Signals, Transceivers .144
28、.1.3 Physical architecture of bus .144.1.4 Physical topology details and definitions 154.1.5 Bus loading 174.1.6 Termination requirements 184.1.7 Device Addressing .184.1.8 Protocol 185 SCSI parallel interface connectors .215.1 SCSI parallel interface connectors overview .215.2 Nonshielded connector
29、 .215.2.1 Nonshielded connector alternative 1 - A cable .215.2.2 Nonshielded connector alternative 2 - A cable .215.2.3 Nonshielded connector alternative 3 - P cable and Q cable 215.2.4 Nonshielded connector alternative 4 225.3 Shielded connector .275.3.1 Shielded connector alternative 1 - A cable .
30、285.3.2 Shielded connector alternative 2 - A cable .285.3.3 Shielded connector alternative 3 - P cable and Q cable 285.3.4 Shielded connector alternative 4 - P cable and Q cable 285.4 Connector contact assignments 375.4.1 SE assignments .385.4.2 Differential connector contact assignments .426 SCSI b
31、us interconnect 496.1 SCSI bus interconnect overview .496.2 SCSI bus cables 496.3 Interconnect characteristics for signals .506.4 Decoupling characteristics for TERMPWR and TERMPWRQ lines 526.5 Connection requirements for RESERVED lines 536.6 Cables used with SE transceivers .536.6.1 SE ground offse
32、t 546.7 Cables used with differential transceivers .546.7.1 HVD stub length and spacing .546.7.2 LVD stub length and spacing .557 SCSI parallel interface electrical characteristics .567.1 SCSI parallel interface electrical characteristics overview 567.2 SE alternative 5714776-112 ISO/IEC:2002(E)SCSI
33、 Parallel Interface-2 iii7.2.1 SE termination 577.2.2 SE output characteristics .577.2.3 SE input characteristics 607.2.4 SE input and output characteristics 617.3 LVD alternative 627.3.1 LVD termination .627.3.2 LVD driver characteristics 667.3.3 LVD receiver characteristics 667.3.4 LVD capacitive
34、loads 677.3.4.1 Management of LVD release glitches .697.3.5 SE/HVD transmission mode detection .697.3.5.1 LVD DIFFSENS driver 707.3.5.2 LVD DIFFSENS receiver .707.4 LVD/MSE multimode alternative .727.4.1 LVD/MSE multimode termination .727.4.2 LVD/MSE multimode transceiver characteristics .737.4.3 Po
35、wer for LVD/MSE multimode transceivers .747.4.4 Ground drivers .747.5 HVD alternative .757.5.1 HVD termination .757.5.2 HVD output characteristics .767.5.3 HVD input characteristics .787.5.4 SE driver protection 797.6 Terminator power 808 SCSI bus signals 828.1 SCSI bus signals overview 828.2 Signal
36、 descriptions 838.3 Parity checking rules .848.4 Signal states 848.4.1 SE 848.4.2 Differential 858.5 OR-tied signals 868.6 Signal sources .869 SCSI parallel bus timing .889.1 SCSI parallel bus timing values 889.2 Timing description .899.2.1 Arbitration delay .899.2.2 Bus clear delay .909.2.3 Bus fre
37、e delay 909.2.4 Bus set delay 909.2.5 Bus settle delay 909.2.6 Cable skew .909.2.7 Data release delay .909.2.8 Disconnection delay .909.2.9 Power on to selection .909.2.10 Receive assertion period 909.2.11 Receive hold time .919.2.12 Receive negation period 919.2.13 Receive setup time .919.2.14 Rece
38、ive period tolerance .919.2.15 Reset hold time 919.2.16 Reset to Selection 919.2.17 Selection abort time .919.2.18 Selection time-out delay .919.2.19 Signal Timing Skew 919.2.20 System deskew delay 919.2.21 Transmit assertion period .929.2.22 Transmit hold time 929.2.23 Transmit negation period .921
39、4776-112 ISO/IEC:2002(E)iv SCSI Parallel Interface-2 9.2.24 Transmit setup time 929.2.25 Transmit period tolerance 929.3 Measurement points 929.3.1 SE fast-10 data transfer rates 929.3.2 SE fast-20 data transfer rates 939.3.3 LVD 949.3.4 HVD 959.4 Setup and hold timings 969.4.1 Fast-10 data transfer
40、 rates .969.4.2 Fast-20 data transfer rates .989.4.3 Fast-40 data transfer rates .10010 Removal and insertion of SCSI devices .10210.1 Removal and insertion of SCSI devices overview .10210.2 Case 1 - Power-off during removal or insertion .10210.3 Case 2 - RST signal asserted continuously during remo
41、val or insertion .10210.4 Case 3 - Current I/O processes not allowed during insertion or removal 10210.5 Case 4 - Current I/O process allowed during insertion or removal .10311 Logical characteristics 10411.1 SCSI bus phases 10411.1.1 SCSI bus phase overview 10411.1.2 BUS FREE phase 10411.1.3 Unexpe
42、cted bus free 10411.1.4 ARBITRATION phase 10511.1.5 SELECTION phase 10511.1.6 SELECTION time-out procedure 10611.1.7 RESELECTION phase .10611.1.7.1 RESELECTION phase overview .10611.1.7.2 RESELECTION .10611.1.7.3 RESELECTION time-out procedure 10711.1.8 Information transfer phases .10711.1.8.1 Infor
43、mation transfer phases overview .10711.1.8.2 Asynchronous information transfer .10811.1.8.3 Synchronous data transfer 10811.1.8.4 Wide data transfer .10911.1.9 COMMAND phase .11111.1.10 Data phase .11111.1.10.1 Data phase overview .11111.1.10.2 DATA IN phase .11111.1.10.3 DATA OUT phase .11111.1.11
44、STATUS phase 11111.1.11.1 STATUS phase overview 11111.1.11.2 STATUS phase exception condition handling .11111.1.12 Message phase 11111.1.12.1 Message phase overview 11111.1.12.2 MESSAGE IN phase .11111.1.12.3 MESSAGE IN phase exception condition handling .11211.1.12.4 MESSAGE OUT phase .11211.1.12.5
45、 MESSAGE OUT phase exception condition handling .11211.1.13 Signal restrictions between phases 11211.2 SCSI bus conditions 11311.2.1 SCSI bus conditions overview 11311.2.2 Attention condition 11311.2.3 Hard reset 11311.2.4 Reset events 11411.2.5 Transceiver mode change reset event .11411.3 SCSI bus
46、phase sequences 11411.4 SCSI pointers 11511.5 SCSI interlocked protocol messages 11511.5.1 SCSI interlocked protocol messages overview 11514776-112 ISO/IEC:2002(E)SCSI Parallel Interface-2 v11.5.2 Message protocols and formats .11611.5.2.1 Message protocol rules .11611.5.2.2 Message formats .11611.5
47、.2.2.1 Message formats overview 11611.5.2.2.2 One-byte messages .11711.5.2.2.3 Two-byte messages .11711.5.2.2.4 Extended messages .11711.5.3 Link control messages .11811.5.3.1 Link control message codes 11811.5.3.2 CONTINUE TASK .11811.5.3.3 DISCONNECT 11911.5.3.4 IDENTIFY 11911.5.3.5 IGNORE WIDE RE
48、SIDUE .12011.5.3.6 INITIATOR DETECTED ERROR 12111.5.3.7 MESSAGE PARITY ERROR 12111.5.3.8 MESSAGE REJECT .12111.5.3.9 MODIFY DATA POINTER .12211.5.3.10 NO OPERATION .12211.5.3.11 RESTORE POINTERS .12211.5.3.12 SAVE DATA POINTER .12211.5.3.13 SYNCHRONOUS DATA TRANSFER REQUEST 12211.5.3.13.1 SYNCHRONOU
49、S DATA TRANSFER REQUEST overview 12211.5.3.13.2 Target initiated SDTR negotiation 12511.5.3.13.3 Initiator initiated SDTR negotiation .12511.5.3.14 TARGET TRANSFER DISABLE .12511.5.3.15 TASK COMPLETE 12611.5.3.16 WIDE DATA TRANSFER REQUEST .12611.5.3.16.1 WIDE DATA TRANSFER REQUEST overview .12611.5.3.16.2 Target initiated WDTR negotiation .12811.5.3.16.3 Initiator initiated WDTR negotiation 12811.5.4 Task attribute messages 12911.5.4.1 Task attribute messages overview 12911.5.4.2 ACA .13011.5.4.3 HEAD OF QUEUE 13011.5.4.4 LINKED COMMAND COMPLETE 13111
