1、BSI Standards PublicationUniversal Serial Bus interfaces for data and powerPart 2-1: Universal Serial Bus Specification, Revision 2.0 (TA 14)BS EN 62680-2-1:2015National forewordThis British Standard is the UK implementation of EN 62680-2-1:2015. It is identical to IEC 62680-2-1:2015.The UK particip
2、ation in its preparation was entrusted to Technical Committee EPL/100, Audio, video and multimedia systems and equip-ment.A list of organizations represented on this committee can be obtained onrequest to its secretary.This publication does not purport to include all the necessary provisions ofa con
3、tract. Users are responsible for its correct application. The British Standards Institution 2016.Published by BSI Standards Limited 2016ISBN 978 0 580 88004 9ICS 29.220.01; 33.120.01; 35.200Compliance with a British Standard cannot confer immunity fromlegal obligations.This British Standard was publ
4、ished under the authority of theStandards Policy and Strategy Committee on 29 February 2016.Amendments/corrigenda issued since publicationDate Text affectedBRITISH STANDARDBS EN 62680-2-1:2015EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN 62680-2-1 December 2015 ICS 29.220; 33.120; 35.200 Engl
5、ish Version Universal Serial Bus interfaces for data and power - Part 2-1: Universal Serial Bus Specification, Revision 2.0 (TA 14) (IEC 62680-2-1:2015) Interfaces de bus universel en srie pour les donnes et lalimentation lectrique - Partie 2-1 : spcification du bus universel en srie, rvision 2.0 (T
6、A 14) (IEC 62680-2-1:2015) Schnittstellen des Universellen Seriellen Busses fr Daten und Energie - Teil 2-1: Festlegung des Universellen Seriellen Busses, berarbeitung 2.0 (IEC 62680-2-1:2015) This European Standard was approved by CENELEC on 2015-10-20. CENELEC members are bound to comply with the
7、CEN/CENELEC Internal Regulations which stipulate the conditions for giving this European Standard the status of a national standard without any alteration. Up-to-date lists and bibliographical references concerning such national standards may be obtained on application to the CEN-CENELEC Management
8、Centre or to any CENELEC member. This European Standard exists in three official versions (English, French, German). A version in any other language made by translation under the responsibility of a CENELEC member into its own language and notified to the CEN-CENELEC Management Centre has the same s
9、tatus as the official versions. CENELEC members are the national electrotechnical committees of Austria, Belgium, Bulgaria, Croatia, Cyprus, the Czech Republic, Denmark, Estonia, Finland, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithua
10、nia, Luxembourg, Malta, the Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and the United Kingdom. European Committee for Electrotechnical Standardization Comit Europen de Normalisation Electrotechnique Europisches Komitee fr Elektrotechnische
11、Normung CEN-CENELEC Management Centre: Avenue Marnix 17, B-1000 Brussels 2015 CENELEC All rights of exploitation in any form and by any means reserved worldwide for CENELEC Members. Ref. No. EN 62680-2-1:2015 E BS EN 62680-2-1:2015EN 62680-2-1:2015 2 European foreword The text of document 100/2331/C
12、DV, future edition 1 of IEC 62680-2-1, prepared by Technical Area 14 “Interfaces and methods of measurement for personal computing equipment“ of IEC/TC 100 “Audio, video and multimedia systems and equipment“ was submitted to the IEC-CENELEC parallel vote and approved by CENELEC as EN 62680-2-1:2015.
13、 The following dates are fixed: latest date by which the document has to be implemented at national level by publication of an identical national standard or by endorsement (dop) 2016-07-20 latest date by which the national standards conflicting with the document have to be withdrawn (dow) 2018-10-2
14、0 Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights. CENELEC and/or CEN shall not be held responsible for identifying any or all such patent rights. Endorsement notice The text of the International Standard IEC 62680-2-1:2015 was app
15、roved by CENELEC as a European Standard without any modification. BS EN 62680-2-1:2015 2 IEC 62680-2-1:2015 IEC 2015 USB-IF 2014 INTERNATIONAL ELECTROTECHNICAL COMMISSION _ UNIVERSAL SERIAL BUS INTERFACES FOR DATA AND POWER Part 2-1: Universal Serial Bus Specification, Revision 2.0 FOREWORD 1) The I
16、nternational Electrotechnical Commission (IEC) is a worldwide organization for standardization comprising all national electrotechnical committees (IEC National Committees). The object of IEC is to promote international co-operation on all questions concerning standardization in the electrical and e
17、lectronic fields. To this end and in addition to other activities, IEC publishes International Standards, Technical Specifications, Technical Reports, Publicly Available Specifications (PAS) and Guides (hereafter referred to as “IEC Publication(s)”). Their preparation is entrusted to technical commi
18、ttees; any IEC National Committee interested in the subject dealt with may participate in this preparatory work. International, governmental and non-governmental organizations liaising with the IEC also participate in this preparation. IEC collaborates closely with the International Organization for
19、 Standardization (ISO) in accordance with conditions determined by agreement between the two organizations. 2) The formal decisions or agreements of IEC on technical matters express, as nearly as possible, an international consensus of opinion on the relevant subjects since each technical committee
20、has representation from all interested IEC National Committees. 3) IEC Publications have the form of recommendations for international use and are accepted by IEC National Committees in that sense. While all reasonable efforts are made to ensure that the technical content of IEC Publications is accu
21、rate, IEC cannot be held responsible for the way in which they are used or for any misinterpretation by any end user. 4) In order to promote international uniformity, IEC National Committees undertake to apply IEC Publications transparently to the maximum extent possible in their national and region
22、al publications. Any divergence between any IEC Publication and the corresponding national or regional publication shall be clearly indicated in the latter. 5) IEC itself does not provide any attestation of conformity. Independent certification bodies provide conformity assessment services and, in s
23、ome areas, access to IEC marks of conformity. IEC is not responsible for any services carried out by independent certification bodies. 6) All users should ensure that they have the latest edition of this publication. 7) No liability shall attach to IEC or its directors, employees, servants or agents
24、 including individual experts and members of its technical committees and IEC National Committees for any personal injury, property damage or other damage of any nature whatsoever, whether direct or indirect, or for costs (including legal fees) and expenses arising out of the publication, use of, or
25、 reliance upon, this IEC Publication or any other IEC Publications. 8) Attention is drawn to the Normative references cited in this publication. Use of the referenced publications is indispensable for the correct application of this publication. 9) Attention is drawn to the possibility that some of
26、the elements of this IEC Publication may be the subject of patent rights. IEC shall not be held responsible for identifying any or all such patent rights. International Standard IEC 62680-2-1 has been prepared by technical area 14: Interfaces and methods of measurement for personal computing equipme
27、nt, of IEC technical committee 100: Audio, video and multimedia systems and equipment. The text of this standard is based on documents prepared by the USB Implementers Forum (USB-IF). The structure and editorial rules used in this publication reflect the practice of the organization which submitted
28、it. BS EN 62680-2-1:2015IEC 62680-2-1:2015 IEC 2015 3 USB-IF 2014 The text of this standard is based on the following documents: CDV Report on voting 100/2331/CDV 100/2434/RVC Full information on the voting for the approval of this standard can be found in the report on voting indicated in the above
29、 table. A list of all the parts in the IEC 62680 series, published under the general title Universal serial bus interfaces for data and power can be found on the IEC website. The committee has decided that the contents of this publication will remain unchanged until the stability date indicated on t
30、he IEC website under “http:/webstore.iec.ch“ in the data related to the specific publication. At this date, the publication will be reconfirmed, withdrawn, replaced by a revised edition, or amended. A bilingual version of this publication may be issued at a later date. IMPORTANT The colour inside lo
31、go on the cover page of this publication indicates that it contains colours which are considered to be useful for the correct understanding of its contents. Users should therefore print this document using a colour printer. BS EN 62680-2-1:2015 4 IEC 62680-2-1:2015 IEC 2015 USB-IF 2014 INTRODUCTION
32、The IEC 62680 series is based on a series of specifications that were originally developed by the USB Implementers Forum (USB-IF). These specifications were to submitted to the IEC under the auspices of a special agreement between the IEC and the USB IF. The USB Implementers Forum, Inc.(USB-IF) is a
33、 non-profit corporation founded by the group of companies that developed the Universal Serial Bus specification. The USB-IF was formed to provide a support organization and forum for the advancement and adoption of Universal Serial Bus technology. The Forum facilitates the development of high-qualit
34、y compatible USB peripherals (devices), and promotes the benefits of USB and the quality of products that have passed compliance testing. ANY USB SPECIFICATIONS ARE PROVIDED TO YOU “AS IS, “WITH NO WARRANTIES WHATSOEVER, INCLUDING ANY WARRANTY OF MERCHANTABILITY, NON-INFRINGEMENT, OR FITNESS FOR ANY
35、 PARTICULAR PURPOSE. THE USB IMPLEMENTERS FORUM AND THE AUTHORS OF ANY USB SPECIFICATIONS DISCLAIM ALL LIABILITY, INCLUDING LIABILITY FOR INFRINGEMENT OF ANY PROPRIETARY RIGHTS, RELATING TO USE OR IMPLEMENTATION OR INFORMATION IN THIS SPECIFICAITON. THE PROVISION OF ANY USB SPECIFICATIONS TO YOU DOE
36、S NOT PROVIDE YOU WITH ANY LICENSE, EXPRESS OR IMPLIED, BY ESTOPPEL OR OTHERWISE, TO ANY INTELLECTUAL PROPERTY RIGHTS. Entering into USB Adopters Agreements may, however, allow a signing company to participate in a reciprocal, royalty-free licensing arrangement for compliant products. For more infor
37、mation, please see: http:/www.usb.org/developers/docs/ http:/www.usb.org/developers/devclass_docs#approved IEC DOES NOT TAKE ANY POSITION AS TO WHETHER IT IS ADVISABLE FOR YOU TO ENTER INTO ANY USB ADOPTERS AGREEMENTS OR TO PARTICIPATE IN THE USB IMPLEMENTERS FORUM.” This series covers the Universal
38、 Series Bus interfaces for data and power and consists of the following parts: IEC 62680-1-1, Universal Serial Bus interfaces for data and power Part 1-1: Common components USB Battery Charging Specification, Revision 1.2 IEC 62680-2-1, Universal Serial Bus interfaces for data and power Part 2-1: Un
39、iversal Serial Bus Specification, Revision 2.0 IEC 62680-2-2, Universal Serial Bus interfaces for data and power Part 2-2: USB Micro-USB Cables and Connectors Specification, Revision 1.01 IEC 62680-2-3, Universal Serial Bus interfaces for data and power Part 2-3: Universal Serial Bus Cables and Conn
40、ectors Class Document, Revision 2.0 This part of the IEC 62680 series consists of several distinct parts: the main body of the text, which consists of the original specification and all ECN and Errata developed by the USB-IF. BS EN 62680-2-1:2015IEC 62680-2-1:2015 IEC 2015 5 USB-IF 2014 CONTENTS FOR
41、EWORD . 2 INTRODUCTION . 4 1 Chapter 1 Introduction 29 1.1 Motivation . 29 1.2 Objective of the Specification 29 1.3 Scope of the Document . 30 1.4 USB Product Compliance 30 1.5 Document Organization 30 2 Chapter 2 Terms and Abbreviations 31 3 Chapter 3 Background 37 3.1 Goals for the Universal Seri
42、al Bus 37 3.2 Taxonomy of Application Space 37 3.3 Feature List 38 4 Chapter 4 Architectural Overview . 40 4.1 USB System Description . 40 4.1.1 Bus Topology 40 4.2 Physical Interface . 41 4.2.1 Electrical . 42 4.2.2 Mechanical 42 4.3 Power . 42 4.3.1 Power Distribution . 43 4.3.2 Power Management .
43、 43 4.4 Bus Protocol . 43 4.5 Robustness . 43 4.5.1 Error Detection 44 4.5.2 Error Handling . 44 4.6 System Configuration 44 4.6.1 Attachment of USB Devices . 44 4.6.2 Removal of USB Devices . 44 4.6.3 Bus Enumeration . 45 4.7 Data Flow Types . 45 4.7.1 Control Transfers . 45 4.7.2 Bulk Transfers .
44、45 4.7.3 Interrupt Transfers . 45 4.7.4 Isochronous Transfers . 46 4.7.5 Allocating USB Bandwidth . 46 4.8 USB Devices . 46 4.8.1 Device Characterizations . 46 4.8.2 Device Descriptions . 47 4.9 USB Host: Hardware and Software 49 4.10 Architectural Extensions . 49 5 Chapter 5 USB Data Flow Model . 5
45、0 5.1 Implementer Viewpoints 50 5.2 Bus Topology 51 5.2.1 USB Host 52 5.2.2 USB Devices . 52 BS EN 62680-2-1:2015 6 IEC 62680-2-1:2015 IEC 2015 USB-IF 2014 5.2.3 Physical Bus Topology 53 5.2.4 Logical Bus Topology 54 5.2.5 Client Software-to-function Relationship 55 5.3 USB Communication Flow . 55 5
46、.3.1 Device Endpoints . 57 5.3.2 Pipes . 58 5.3.3 Frames and Microframes . 60 5.4 Transfer Types 60 5.4.1 Table Calculation Examples. 61 5.5 Control Transfers 62 5.5.1 Control Transfer Data Format 62 5.5.2 Control Transfer Direction 63 5.5.3 Control Transfer Packet Size Constraints 63 5.5.4 Control
47、Transfer Bus Access Constraints . 64 5.5.5 Control Transfer Data Sequences 66 5.6 Isochronous Transfers 67 5.6.1 Isochronous Transfer Data Format. 67 5.6.2 Isochronous Transfer Direction 67 5.6.3 Isochronous Transfer Packet Size Constraints . 67 5.6.4 Isochronous Transfer Bus Access Constraints . 69
48、 5.6.5 Isochronous Transfer Data Sequences 70 5.7 Interrupt Transfers 70 5.7.1 Interrupt Transfer Data Format 70 5.7.2 Interrupt Transfer Direction 70 5.7.3 Interrupt Transfer Packet Size Constraints. 70 5.7.4 Interrupt Transfer Bus Access Constraints . 71 5.7.5 Interrupt Transfer Data Sequences 74
49、5.8 Bulk Transfers 74 5.8.1 Bulk Transfer Data Format . 74 5.8.2 Bulk Transfer Direction 74 5.8.3 Bulk Transfer Packet Size Constraints . 74 5.8.4 Bulk Transfer Bus Access Constraints . 75 5.8.5 Bulk Transfer Data Sequences 76 5.9 High-Speed, High Bandwidth Endpoints 77 5.9.1 High Bandwidth Interrupt Endpoints . 77 5.9.2 High Bandwidth Isochronous Endpoints . 78 5.10 Split Transactions . 79 5.11 Bus Access for Transfers 79 5.11.1 Transfer Management 80 5.11.2 Transaction Tracking .
