ISO-14776-115-2004.pdf
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1、 INTERNATIONAL STANDARD ISO/IEC 14776-115 First edition 2004-11 Information technology Small computer system interface (SCSI) Part 115: Parallel Interface-5 (SPI-5) Reference number ISO/IEC 14776-115:2004(E) Copyright International Organization for Standardization Provided by IHS under license with
2、ISO Licensee=IHS Employees/1111111001, User=Wing, Bernie Not for Resale, 04/02/2007 21:41:15 MDTNo reproduction or networking permitted without license from IHS -,-,- Copyright International Organization for Standardization Provided by IHS under license with ISO Licensee=IHS Employees/1111111001, Us
3、er=Wing, Bernie Not for Resale, 04/02/2007 21:41:15 MDTNo reproduction or networking permitted without license from IHS -,-,- INTERNATIONAL STANDARD ISO/IEC 14776-115 First edition 2004-11 Information technology Small computer system interface (SCSI) Part 115: Parallel Interface-5 (SPI-5) PRICE CODE
4、 ISO/IEC 2004 All rights reserved. Unless otherwise specified, 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. ISO/IEC Copyright Office Case postal
5、e 56 CH-1211 Genve 20 Switzerland For price, see current catalogue XG Copyright International Organization for Standardization Provided by IHS under license with ISO Licensee=IHS Employees/1111111001, User=Wing, Bernie Not for Resale, 04/02/2007 21:41:15 MDTNo reproduction or networking permitted wi
6、thout license from IHS -,-,- Copyright International Organization for Standardization Provided by IHS under license with ISO Licensee=IHS Employees/1111111001, User=Wing, Bernie Not for Resale, 04/02/2007 21:41:15 MDTNo reproduction or networking permitted without license from IHS -,-,- ISO/IEC 1477
7、6-1153 Contents Page Foreword .19 Introduction.20 1 Scope .21 2 Normative references .22 2.1 Normative references 22 2.2 Approved references .22 2.3 References under development 23 2.4 Other references .23 3 Definitions, symbols, abbreviations, and conventions 23 3.1 Definitions .23 3.2 Symbols and
8、abbreviations .32 3.3 Keywords 33 3.4 Conventions 34 3.5 Notation for Procedures and Functions .35 4 SCSI parallel interface model .36 4.1 SCSI parallel interface model overview 36 4.2 Cables, connectors, signals, transceivers .36 4.3 Physical architecture of bus segment .36 4.4 Driver-receiver conn
9、ections 37 4.5 Physical topology details and definitions .37 4.6 Bus segment loading .39 4.7 Termination requirements .39 4.8 SCSI device Addressing .39 4.9 Clocking methods for data transfers .40 4.10 Paced transfer on a SCSI bus .42 4.11 Data transfers 44 4.11.1 Data transfer modes .44 4.11.1.1 As
10、ynchronous transfers 44 4.11.1.2 Synchronous transfers 44 4.11.1.3 Paced transfers .44 4.11.2 ST DATA phase parallel transfers 44 4.11.3 DT DATA phase parallel transfers .45 4.11.3.1 DT DATA phase parallel transfers format .45 4.11.3.2 Data group transfers .45 4.11.3.3 Information unit transfers 45
11、4.12 Negotiation 46 4.12.1 Negotiation introduction .46 4.12.2 Negotiation algorithm .46 4.12.3 When to negotiate 47 4.12.4 Negotiable fields .48 4.12.4.1 Negotiable fields introduction 48 4.12.4.2 Transfer agreements .49 4.12.4.3 Transfer period factor 49 4.12.4.4 REQ/ACK offset 51 4.12.4.5 Transfe
12、r width exponent 52 4.12.4.6 Protocol options 52 4.12.4.6.1 Protocol options introduction 52 4.12.4.6.2 IU_REQ 53 4.12.4.6.3 DT_REQ .54 14776-115 ISO/IEC:2004(E)3 Copyright International Organization for Standardization Provided by IHS under license with ISO Licensee=IHS Employees/1111111001, User=W
13、ing, Bernie Not for Resale, 04/02/2007 21:41:15 MDTNo reproduction or networking permitted without license from IHS -,-,- 4ISO/IEC 14776-115 4.12.4.6.4 QAS_REQ 54 4.12.4.6.5 HOLD_MCS .54 4.12.4.6.6 WR_FLOW .55 4.12.4.6.7 RD_STRM 55 4.12.4.6.8 RTI .55 4.12.4.6.9 PCOMP_EN .55 4.12.5 Negotiable field c
14、ombinations 56 4.12.6 Message restrictions 57 4.12.7 Negotiation message sequences .58 4.12.7.1 Negotiation message sequences overview .58 4.12.7.2 SCSI initiator port originated PPR negotiation 59 4.12.7.3 SCSI initiator port originated WDTR negotiation .60 4.12.7.4 SCSI initiator port originated S
15、DTR negotiation 62 4.12.7.5 SCSI target port originated WDTR negotiation .64 4.12.7.6 SCSI target port originated SDTR negotiation 67 4.13 Protocol .68 5 SCSI parallel interface connectors .71 5.1 SCSI parallel interface connectors overview .71 5.2 Non-shielded connector 71 5.2.1 Non-shielded connec
16、tor alternative 1 - A cable .71 5.2.2 Non-shielded connector alternative 2 - A cable .71 5.2.3 Non-shielded connector alternative 3 - P cable .72 5.2.4 Non-shielded connector alternative 4 .72 5.3 Shielded connector .78 5.3.1 Shielded connector overview .78 5.3.2 Shielded connector alternative 1 - A
17、 cable .78 5.3.3 Shielded connector alternative 2 - A cable .78 5.3.4 Shielded connector alternative 3 - P cable .78 5.3.5 Shielded connector alternative 4 - P cable .78 5.4 Connector contact assignments 86 5.4.1 Connector contact assignments overview 86 5.4.2 Differential connector contact assignme
18、nts .87 6 SCSI bus segment interconnect .90 6.1 SCSI bus segment interconnect overview 90 6.2 SCSI bus segment cables .90 6.3 Interconnect characteristics for signals .91 6.3.1 SCSI bulk cable 91 6.3.2 Minimum conductor size for signals .92 6.3.3 Local transmission line impedance 92 6.3.4 Extended d
19、istance transmission line impedance .92 6.3.5 Capacitance .92 6.3.6 Differential propagation time and propagation time skew 92 6.3.7 Differential attenuation .92 6.3.8 Crosstalk 93 6.4 Decoupling characteristics for TERMPWR lines .93 6.5 Connection requirements for RESERVED lines 94 6.6 Cables used
20、with LVD transceivers 94 6.7 LVD stub length and spacing 95 7 SCSI parallel interface electrical characteristics .96 7.1 SCSI parallel interface electrical characteristics overview 96 7.2 LVD termination .96 7.2.1 LVD termination overview 96 7.2.2 LVD driver characteristics 101 7.2.3 LVD receiver ch
21、aracteristics 104 414776-115 ISO/IEC:2004(E) Copyright International Organization for Standardization Provided by IHS under license with ISO Licensee=IHS Employees/1111111001, User=Wing, Bernie Not for Resale, 04/02/2007 21:41:15 MDTNo reproduction or networking permitted without license from IHS -,
22、-,- ISO/IEC 14776-1155 7.2.4 LVD capacitive loads 105 7.2.4.1 Management of LVD release glitches .107 7.2.5 SE/HVD transmission mode detection .109 7.2.5.1 SE/HVD transmission mode detection overview .109 7.2.5.2 LVD DIFFSENS driver 109 7.2.5.3 LVD DIFFSENS receiver .110 7.3 Terminator power 112 8 S
23、CSI bus signals 114 8.1 SCSI bus signals overview 114 8.2 Signal descriptions 114 8.3 LVD Signal states 117 8.4 OR-tied signals 118 8.5 Signal sources .118 9 SCSI parallel bus timing .120 9.1 SCSI parallel bus timing values 120 9.2 Timing description .126 9.2.1 Arbitration delay .126 9.2.2 ATN trans
24、mit setup time .127 9.2.3 ATN receive setup time 127 9.2.4 Bus clear delay .127 9.2.5 Bus free delay 127 9.2.6 Bus set delay 127 9.2.7 Bus settle delay 128 9.2.8 Cable skew .128 9.2.9 Chip noise in receiver .128 9.2.10 Clock jitter 128 9.2.11 Crosstalk time shift .128 9.2.12 Flow control receive hol
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