1、VME64bus SpecificationReference numberISO/IEC 15776:2001(E)National Standard of CanadaCAN/CSA-ISO/IEC 15776:04(ISO/IEC 15776:2001)International Standard ISO/IEC 15776:2001 (first edition, 2001-12) has been adopted without modification (IDT)as CSA Standard CAN/CSA-ISO/IEC 15776:04, which has been app
2、roved as a National Standard of Canada by theStandards Council of Canada.ISBN 1-55397-321-6 January 2004The Canadian Standards Association (CSA), The Standards Council of Canada is theunder whose auspices this National Standard has been coordinating body of the National Standards system, produced, w
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4、ion 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 means CSA standards reflect a national consensus of of advancing the national economy, benefiting
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6、ndards 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 in their regulations, particularly in has been approved by the Standards Council ofthe fields of
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9、re 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 contribution to the national interest.membership from which its Directors are chosen. Approval of a stand
10、ard 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 established by the StandardsThe Association offers certification and testing Council of Canada. Ap
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12、ganization.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 office and laboratory complex whenever practicable. These standards are subject in Toronto, CSA
13、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 eight countries. Since 1919, the preparing the standard.Association has developed the necessary exper
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15、change 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 services, write toCanadian Standards Association5060 Spectrum Way, Suite 100Mississauga, Ontario, L4W 5N
16、6CanadaAlthough 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 particular purpose.Registered trade-mark of Canadian Standards AssociationCAN/CSA-ISO/IEC 15776:04 VME64
17、bus SpecificationJanuary 2004 Canadian Standards Association CSA/1CAN/CSA-ISO/IEC 15776:04VME64bus SpecificationCSA PrefaceStandards development within the Information Technology sector is harmonized with internationalstandards development. Through the CSA Technical Committee on Information Technolo
18、gy (TCIT),Canadians serve as the Canadian 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 t
19、heInternational Telecommunication Union (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 accept
20、able for use in Canada. (Acommittee membership 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 catalo
21、gue or CSA Info Update orcontact a CSA Sales 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 r
22、eserved. No part of this publication may 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”
23、. Inquiries regarding this National Standard 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/IEC15776First edition2001-12VME64bus SpecificationReference nu
24、mberISO/IEC 15776:2001(E) 2 15776 ISO/IEC:2001(E)CONTENTSFOREWORD 8INTRODUCTION91 General131.1 Scope and object 131.2 Normative references131.3 VMEbus interface system elements141.4 VMEbus specification diagrams201.5 Specification terminology 221.6 Protocol specification 241.7 System examples and ex
25、planations252 Data transfer bus.252.1 Introduction252.2 Data-transfer-bus lines272.3 DTB modules Basic description .382.4 Typical operation.642.5 Data-transfer-bus acquisition 732.6 DTB timing rules and observations .753 Data transfer bus arbitration1203.1 Bus arbitration philosophy.1203.2 Arbitrati
26、on bus lines.1223.3 Functional modules .1243.4 Typical operation.1323.5 Race conditions between master requests and arbiter grants1414 Priority interrupt bus.1414.1 Introduction1414.2 Priority interrupt bus lines1444.3 Priority interrupt bus modules Basic description 1464.4 Typical operation.1594.5
27、Race conditions.1654.6 Priority interrupt bus timing rules and observations 1665 Utility bus .1835.1 Introduction1835.2 Utility bus signal lines. .1835.3 Utility bus modules 1835.4 System initialization and diagnostics.1865.5 Power and ground pins .1905.6 Reserved line 1915.7 Auto slot ID1915.8 Auto
28、 system controller.1986 Electrical specifications .1996.1 Introduction1996.2 Power distribution2006.3 Electrical signal characteristics .2016.4 Bus driving and receiving requirements 20215776 ISO/IEC:2001(E) 3 6.5 Backplane signal line interconnections .2066.6 User defined signals2106.7 Signal line
29、drivers and terminations 2107 Mechanical specifications2127.1 Introduction2127.2 VMEbus boards.2137.3 Front panels 2177.4 Backplanes2207.5 Assembly of VMEbus subracks.2227.6 Conduction cooled VMEbus systems2237.7 VMEbus backplane connectors and VMEbus board connectors 223Annex A (normative) Glossary
30、 of VMEbus terms 245Annex B (normative) VMEbus Connector/Pin description .251Annex C (normative) Manufacturers board identification255Rule index.257Figure 1 System elements.15Figure 2 Functional modules and buses21Figure 3 Signal timing notation 25Figure 4 Data transfer bus functional block diagram.
31、28Figure 5 Block diagram Master.39Figure 6 Block diagram Slave.41Figure 7 Block diagram Bus timer 43Figure 8 Block diagram Location monitor.44Figure 9 Four ways in which 32 bits of data might be stored in memory.53Figure 10 Four ways in which 16 bits of data might be stored in memory.54Figure 11 Blo
32、ck diagram Configuration ROM / Control b) to specify the electrical and mechanical system characteristics required to design devices that willreliably and unambiguously communicate with other devices interfaced to the VMEbus;c) to specify protocols that precisely define the interaction between the V
33、MEbus and devicesinterfaced to it;d) to provide terminology and definitions that describe the system protocol;e) to allow a broad range of design latitude so that the designer can optimize cost and/or performancewithout affecting system compatibility;f) to provide a system where performance is prima
34、rily device limited, rather than system interfacelimited.1.2 Normative referencesThe following referenced documents are indispensable for the application of this document. For datedreferences, only the edition cited applies. For undated references, the latest edition of the referenceddocument (inclu
35、ding any amendments) applies.IEC 60297-1:1986, Dimensions of mechanical structures of the 482,6 mm (19 in) series Part 1:Panels and racksIEC 60297-2:1982, Dimensions of mechanical structures of the 482,6 mm (19 in) series Part 2:Cabinets and pitches of rack structuresIEC 60297-3:1984, Dimensions of
36、mechanical structures of the 482,6 mm (19 in) series Part 3:Subracks and associated plug-in unitsIEC 60297-4:1995, Mechanical structures for electronic equipment Dimensions of mechanicalstructures of the 482,6 mm (19 in) series Part 4: Subracks and associated plug-in units AdditionaldimensionsIEC 60
37、603-2:1995, Connectors for frequencies below 3 MHz for use with printed boards Part 2:Detail specification for two-part connectors with assessed quality, for printed boards, for basic grid of2.54 mm (0.1 in) with common mounting featuresIEC 61076 (all parts), Connectors with assessed quality, for us
38、e in d.c., low frequency analogue anddigital high speed data applicationsIEEE 1101.2, Standard for Mechanical Core Specifications for Conduction-Cooled EurocardsIEEE 1394, Standard for a High Performance Serial Bus 14 15776 ISO/IEC:2001(E)1.3 VMEbus interface system elements1.3.1 Basic definitionsTh
39、e VMEbus structure can be described from two points of view: its mechanical structure and itsfunctional structure. The mechanical specification describes the physical dimensions of subracks,backplanes, front panels, plug-in boards, etc. The VMEbus functional specification describes how thebus works,
40、 what functional modules are involved in each transaction, and the rules which govern theirbehavior. The following informal definitions describe some basic terms used for both the mechanicaland the functional structure of the VMEbus.1.3.1.1 VMEbus mechanical structure1.3.1.1.1VMEbus backplaneprinted
41、 circuit (PC) board with 96 or 160 pin connectors and signal paths that bus the connector pinsSome VMEbus systems have a single PC board, called the J1 backplane. It provides the signal pathsneeded for basic operation. Other VMEbus systems also have an optional second PC board, called aJ2 backplane.
42、 It provides the additional 96 or 160 pin connectors and signal paths needed for widerdata and address transfers. Still others have a single PC board that provides the signal conductors andconnectors of both the J1 and J2 backplanes.1.3.1.1.2boardprinted circuit (PC) board, its collection of electro
43、nic components, with either one or two 96 or 160 pinconnectors that can be plugged into VMEbus backplane connectors1.3.1.1.3slotposition where a board can be inserted into a VMEbus backplaneIf the VMEbus system has both a J1 and a J2 backplane (or a combination J1/J2 backplane) each slotprovides a p
44、air of 96 or 160 pin connectors. If the system has only a J1 backplane, then each slotprovides a single 96 or 160 pin connector.1.3.1.1.4subrackrigid framework that provides mechanical support for boards inserted into the backplane, ensuring thatthe connectors mate properly and that adjacent boards
45、do not contact each other. It also guides thecooling airflow through the system, and ensures that inserted boards do not disengage themselvesfrom the backplane due to vibration or shock1.3.1.2 VMEbus functional structureFigure 1 shows a simplified block diagram of the functional structure, including
46、 the VMEbus signallines, backplane interface logic, and functional modules.1.3.1.2.1backplane interface logicspecial interface logic that takes into account the characteristics of the backplane: its signal lineimpedance, propagation time, termination values, etc.The VMEbus specification prescribes c
47、ertain rules for the design of this logic based on the maximumlength of the backplane and its maximum number of board slots.15776 ISO/IEC:2001(E) 15 1.3.1.2.2functional modulecollection of electronic circuitry that resides on one VMEbus board and works together to accomplish atask1.3.1.2.3data trans
48、fer busone of the four buses provided by the VMEbus backplaneThe Data Transfer Bus allows Masters to direct the transfer of binary data between themselves andSlaves. (Data Transfer Bus is often abbreviated DTB.)1.3.1.2.4data transfer bus cyclesequence of level transitions on the signal lines of the
49、DTB that result in the transfer of an address oran address and data between a Master and a SlaveThe Data Transfer Bus cycle is divided into two portions, the address broadcast and then zero or moredata transfers. There are 34 types of Data Transfer Bus cycles. They are defined later in this chapter.1.3.1.2.5masterfunctional module that initiates DTB cycles in order to transfer data between itself and a Slave moduleFUNCTIONAL MODULEFUNCTIONAL MODULEBACKPLANE INTERFACE LOGICDATA PROCESSING DEVICECPU B
