1、ANSI INCITS 302-1998 (R2003)(formerly ANSI X3.302-1998)for Information Technology SCSI Parallel Interface-2 (SPI-2)Copyright American National Standards Institute Provided by IHS under license with ANSINot for ResaleNo reproduction or networking permitted without license from IHS-,-,-Copyright Ameri
2、can National Standards Institute Provided by IHS under license with ANSINot for ResaleNo reproduction or networking permitted without license from IHS-,-,-ANSIX3.302-1998American National Standardfor Information Technology SCSI Parallel Interface-2 (SPI-2)SecretariatInformation Technology Industry C
3、ouncilApproved November 11, 1998 American National Standards Institute, Inc.AbstractThis standard defines mechanical, electrical, timing requirements, command, and the task managementdelivery protocol requirements to transfer commands and data between SCSI devices attached to an SCSIparallel interfa
4、ce. This standard is intended to be used in conjunction with the SCSI command sets. Theresulting interface facilitates the interconnection of computers and intelligent peripherals and thus pro-vides a common interface standard for both system integrators and suppliers of intelligent peripherals.Copy
5、right American National Standards Institute Provided by IHS under license with ANSINot for ResaleNo reproduction or networking permitted without license from IHS-,-,-Approval of an American National Standard requires review by ANSI that therequirements for due process, consensus, and other criteria
6、for approval havebeen met by the standards developer.Consensus is established when, in the judgement of the ANSI Board ofStandards Review, substantial agreement has been reached by directly andmaterially affected interests. Substantial agreement means much more thana simple majority, but not necessa
7、rily unanimity. Consensus requires that allviews and objections be considered, and that a concerted effort be madetowards their resolution.The use of American National Standards is completely voluntary; theirexistence does not in any respect preclude anyone, whether he has approvedthe standards or n
8、ot, from manufacturing, marketing, purchasing, or usingproducts, processes, or procedures not conforming to the standards.The American National Standards Institute does not develop standards andwill in no circumstances give an interpretation of any American NationalStandard. Moreover, no person shal
9、l have the right or authority to issue aninterpretation of an American National Standard in the name of the AmericanNational Standards Institute. Requests for interpretations should beaddressed to the secretariat or sponsor whose name appears on the titlepage of this standard.CAUTION NOTICE: This Am
10、erican National Standard may be revised orwithdrawn at any time. The procedures of the American National StandardsInstitute require that action be taken periodically to reaffirm, revise, orwithdraw this standard. Purchasers of American National Standards mayreceive current information on all standar
11、ds by calling or writing the AmericanNational Standards Institute.American National StandardPublished byAmerican National Standards Institute, Inc.11 West 42nd Street, New York, NY 10036Copyright 1999 by Information Technology Industry Council (ITI)All rights reserved.No part of this publication may
12、 be reproduced in anyform, in an electronic retrieval system or otherwise,without prior written permission of ITI, 1250 Eye Street NW, Washington, DC 20005. Printed in the United States of AmericaCAUTION: The developers of this standard have requested that holders of patents that may be re-quired fo
13、r the implementation of the standard disclose such patents to the publisher. However, nei-ther the developers nor the publisher have undertaken a patent search in order to identify which, ifany, patents may apply to this standard. As of the date of publication of this standard, followingcalls for th
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16、er or publisher in respect to any standard it processes. No representation ismade or implied that this is the only license that may be required to avoid infringement in the use ofthis standard.Copyright American National Standards Institute Provided by IHS under license with ANSINot for ResaleNo rep
17、roduction or networking permitted without license from IHS-,-,-iContentsPageForeword . xiii1 Scope 12 Normative references 32.1 Approved references 32.2 References under development . 42.3 Other references 43 Definitions, symbols, abbreviations, and conventions . 43.1 Definitions 43.2 Symbols and ab
18、breviations 83.3 Keywords . 93.4 Conventions . 93.5 Notation for Procedures and Functions 104 General . 114.1 Overview 114.1.1 Data transfer modes 114.1.2 Cables, Connectors, Signals, Transceivers 114.1.3 Physical architecture of bus 114.1.4 Physical topology details and definitions . 124.1.5 Bus lo
19、ading . 154.1.6 Termination requirements . 154.1.7 Device Addressing 154.1.8 Protocol . 155 SCSI parallel interface connectors 185.1 Nonshielded connector 185.1.1 Nonshielded connector alternative 1 - A cable 185.1.2 Nonshielded connector alternative 2 - A cable 185.1.3 Nonshielded connector alterna
20、tive 3 - P cable and Q cable . 185.1.4 Nonshielded connector alternative 4 . 195.2 Shielded connector 245.2.1 Shielded connector alternative 1 - A cable 255.2.2 Shielded connector alternative 2 - A cable 255.2.3 Shielded connector alternative 3 - P cable and Q cable . 255.2.4 Shielded connector alte
21、rnative 4 - P cable and Q cable . 255.3 Connector contact assignments . 345.3.1 SE assignments 355.3.2 Differential connector contact assignments 396 SCSI bus interconnect 466.1 SCSI bus cables . 466.2 Interconnect characteristics for signals 476.3 Decoupling characteristics for TERMPWR and TERMPWRQ
22、 lines . 496.4 Connection requirements for RESERVED lines . 506.5 Cables used with SE transceivers 506.5.1 SE ground offset . 516.6 Cables used with differential transceivers 526.6.1 HVD stub length and spacing 526.6.2 LVD stub length and spacing 53Copyright American National Standards Institute Pro
23、vided by IHS under license with ANSINot for ResaleNo reproduction or networking permitted without license from IHS-,-,-iiPage7 SCSI parallel interface electrical characteristics . 547.1 SE alternative . 557.1.1 SE termination . 557.1.2 SE output characteristics 567.1.3 SE input characteristics . 587
24、.1.4 SE input and output characteristics . 597.2 LVD alternative . 607.2.1 LVD termination 607.2.2 LVD driver characteristics . 647.2.3 LVD receiver characteristics . 657.2.4 LVD capacitive loads . 667.2.4.1 Management of LVD release glitches 687.2.5 SE/HVD transmission mode detection 697.2.5.1 LVD
25、DIFFSENS driver . 697.2.5.2 LVD DIFFSENS receiver 707.3 LVD/MSE multimode alternative 727.3.1 LVD/MSE multimode termination 727.3.2 LVD/MSE multimode transceiver characteristics 737.3.3 Power for LVD/MSE multimode transceivers 757.3.4 Ground drivers 757.4 HVD alternative 757.4.1 HVD termination 757.
26、4.2 HVD output characteristics 777.4.3 HVD input characteristics 787.4.4 SE driver protection . 807.5 Terminator power . 808 SCSI bus signals . 828.1 Signal descriptions . 838.2 Parity checking rules 848.3 Signal states . 858.3.1 SE . 858.3.2 Differential . 858.4 OR-tied signals . 878.5 Signal sourc
27、es 879 SCSI parallel bus timing 889.1 Timing description 909.1.1 Arbitration delay 909.1.2 Bus clear delay 909.1.3 Bus free delay . 909.1.4 Bus set delay . 909.1.5 Bus settle delay . 909.1.6 Cable skew 909.1.7 Data release delay 909.1.8 Disconnection delay 909.1.9 Power on to selection 909.1.10 Rece
28、ive assertion period . 919.1.11 Receive hold time 919.1.12 Receive negation period . 919.1.13 Receive setup time 91Copyright American National Standards Institute Provided by IHS under license with ANSINot for ResaleNo reproduction or networking permitted without license from IHS-,-,-iiiPage9.1.14 R
29、eceive period tolerance . 919.1.15 Reset hold time . 919.1.16 Reset to Selection . 919.1.17 Selection abort time . 919.1.18 Selection time-out delay 919.1.19 Signal Timing Skew . 929.1.20 System deskew delay 929.1.21 Transmit assertion period 929.1.22 Transmit hold time . 929.1.23 Transmit negation
30、period . 929.1.24 Transmit setup time . 929.1.25 Transmit period tolerance 929.2 Measurement points . 929.2.1 SE fast-10 data transfer rates . 929.2.2 SE fast-20 data transfer rates . 939.2.3 LVD . 949.2.4 HVD . 959.3 Setup and hold timings . 969.3.1 Fast-10 data transfer rates 969.3.2 Fast-20 data
31、transfer rates 989.3.3 Fast-40 data transfer rates 10010 Removal and insertion of SCSI devices 10210.1 Case 1 - Power-off during removal or insertion 10210.2 Case 2 - RST signal asserted continuously during removal or insertion 10210.3 Case 3 - Current I/O processes not allowed during insertion or r
32、emoval . 10210.4 Case 4 - Current I/O process allowed during insertion or removal . 10311 Logical characteristics . 10411.1 SCSI bus phases 10411.1.1 BUS FREE phase 10411.1.1.1 Unexpected bus free 10411.1.2 ARBITRATION phase . 10511.1.3 SELECTION phase . 10611.1.3.1 SELECTION time-out procedure 1061
33、1.1.4 RESELECTION phase 10611.1.4.1 RESELECTION 10611.1.4.2 RESELECTION time-out procedure . 10711.1.5 Information transfer phases . 10711.1.5.1 Asynchronous information transfer . 10811.1.5.2 Synchronous data transfer . 10911.1.5.3 Wide data transfer 11011.1.6 COMMAND phase . 11111.1.7 Data phase 1
34、1111.1.7.1 DATA IN phase 11111.1.7.2 DATA OUT phase 11111.1.8 STATUS phase . 11111.1.8.1 STATUS phase exception condition handling 11211.1.9 Message phase . 11211.1.9.1 MESSAGE IN phase 11211.1.9.1.1 MESSAGE IN phase exception condition handling . 11211.1.9.2 MESSAGE OUT phase 112Copyright American
35、National Standards Institute Provided by IHS under license with ANSINot for ResaleNo reproduction or networking permitted without license from IHS-,-,-ivPage11.1.9.2.1 MESSAGE OUT phase exception condition handling . 11211.1.10 Signal restrictions between phases . 11311.2 SCSI bus conditions . 11311
36、.2.1 Attention condition . 11311.2.2 Hard reset . 11411.2.3 Reset events . 11411.2.3.1 Transceiver mode change reset event . 11411.3 SCSI bus phase sequences . 11511.4 SCSI pointers . 11611.5 SCSI Interlocked Protocol messages . 11711.5.1 Message protocols and formats 11711.5.1.1 Message protocol ru
37、les 11711.5.1.2 Message formats 11711.5.1.2.1 One-byte messages 11811.5.1.2.2 Two-byte messages 11811.5.1.2.3 Extended messages 11811.5.2 Link control messages 11911.5.2.1 CONTINUE TASK 11911.5.2.2 DISCONNECT . 12011.5.2.3 IDENTIFY . 12011.5.2.4 IGNORE WIDE RESIDUE 12111.5.2.5 INITIATOR DETECTED ERR
38、OR . 12211.5.2.6 MESSAGE PARITY ERROR . 12211.5.2.7 MESSAGE REJECT 12311.5.2.8 MODIFY DATA POINTER 12311.5.2.9 NO OPERATION 12311.5.2.10 RESTORE POINTERS 12411.5.2.11 SAVE DATA POINTER 12411.5.2.12 SYNCHRONOUS DATA TRANSFER REQUEST . 12411.5.2.12.1 Target initiated SDTR negotiation . 12611.5.2.12.2
39、Initiator initiated SDTR negotiation 12711.5.2.13 TARGET TRANSFER DISABLE 12711.5.2.14 TASK COMPLETE . 12811.5.2.15 WIDE DATA TRANSFER REQUEST 12811.5.2.15.1 Target initiated WDTR negotiation 13011.5.2.15.2 Initiator initiated WDTR negotiation . 13111.5.3 Task attribute messages . 13111.5.3.1 ACA 13
40、211.5.3.2 HEAD OF QUEUE . 13211.5.3.3 LINKED COMMAND COMPLETE . 13311.5.3.4 LINKED COMMAND COMPLETE (WITH FLAG) 13311.5.3.5 ORDERED . 13311.5.3.6 SIMPLE 13311.5.4 Task management messages . 13411.5.4.1 ABORT TASK 13411.5.4.2 ABORT TASK SET 13511.5.4.3 CLEAR ACA . 13511.5.4.4 CLEAR TASK SET . 13511.5
41、.4.5 LOGICAL UNIT RESET . 13511.5.4.6 TARGET RESET 13611.5.4.7 TERMINATE TASK 13611.6 Command processing considerations and exception conditions . 136Copyright American National Standards Institute Provided by IHS under license with ANSINot for ResaleNo reproduction or networking permitted without l
42、icense from IHS-,-,-vPage11.6.1 Asynchronous event notification 13611.6.2 Incorrect initiator connection . 13711.6.3 Unexpected reselection . 13711.7 Use of disconnect-reconnect page parameters 13711.8 SCSI parallel interface services . 13911.8.1 Procedure terms 13911.8.2 Application client SCSI com
43、mand services . 14111.8.2.1 Send SCSI command service 14111.8.3 Device server SCSI command services 14111.8.3.1 Data-in delivery service 14111.8.3.2 Data-out delivery service 14211.8.4 Task management services 14211.8.4.1 Task management function service 14211.8.4.1.1 ABORT TASK 14211.8.4.1.2 ABORT
44、TASK SET 14211.8.4.1.3 CLEAR ACA 14311.8.4.1.4 CLEAR TASK SET 14311.8.4.1.5 LOGICAL UNIT RESET 14311.8.4.1.6 RESET SERVICE DELIVERY SUBSYSTEM 14311.8.4.1.7 TARGET RESET . 14311.8.4.1.8 TERMINATE TASK . 14311.8.4.1.9 WAKEUP . 143AnnexesA Additional requirements for LVD SCSI drivers and receivers . 14
45、4A.1 System level requirements . 144A.2 Driver requirements . 144A.2.1 Differential output voltage, VS 145A.2.2 Offset (common-mode output) voltage, VCM 147A.2.3 Short-circuit currents, IO-S and IO+S . 148A.2.4 Open-circuit output voltages, VO-(OC)and VO+(OC) . 149A.2.5 Output signal waveform 150A.2
46、.6 Dynamic output signal balance, VCM(PP) 151A.3 Receiver characteristics . 153A.3.1 Receiver steady state input voltage requirements 153A.3.2 Compliance test 153A.3.3 Receiver setup and hold times 154A.4 Transceiver characteristics 154A.4.1 Transceiver output/input currents, II-L and II+L 155A.4.2
47、Transceiver maximum input voltages 155B SCSI configured automatically (SCAM) 156B.1 Model . 156B.2 Glossary . 156B.3 SCAM requirements . 156B.3.1 Configuration requirements . 156B.3.2 Timing requirements . 157B.3.2.1 SCAM tolerant power-on to selection delay . 157B.3.2.2 SCAM tolerant reset to selec
48、tion delay 157B.3.2.3 SCAM tolerant selection response time . 158B.3.2.4 SCAM unassigned ID selection response delay 158Copyright American National Standards Institute Provided by IHS under license with ANSINot for ResaleNo reproduction or networking permitted without license from IHS-,-,-viPageB.3.
49、2.5 SCAM power-on to SCAM selection delay 158B.3.2.6 SCAM reset to SCAM selection delay . 158B.3.2.7 SCAM selection response time 158B.3.2.8 Recommended SCAM selection response time 158B.3.2.9 Wide arbitration time 158B.3.3 Device requirements . 158B.3.3.1 SCAM tolerant target . 159B.3.3.2 Level 1 SCAM initiator . 159B.3.3.3 Level 1 SCAM target 159B.3.3.4 Level 2 SCAM initiator . 160B.3.3.5 Level 2 SCAM
