1、BSI Standards PublicationUniversal serial bus interfaces for data and powerPart 1: Universal serial bus specification, revision 2.0BS EN 62680-1:2013National forewordThis British Standard is the UK implementation of EN 62680-1:2013. It isidentical to IEC 62680-1:2013.The UK participation in its prep
2、aration was entrusted to Technical Committee EPL/100, Audio, video and multimedia systems and equipment.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 of a contract. Users are
3、responsible for its correct application. The British Standards Institution 2014.Published by BSI Standards Limited 2014ISBN 978 0 580 79814 6ICS 35.200Compliance with a British Standard cannot confer immunity fromlegal obligations.This British Standard was published under the authority of theStandar
4、ds Policy and Strategy Committee on 28 February 2014.Amendments/corrigenda issued since publicationDate Text affectedBRITISH STANDARDBS EN 62680-1:2013EUROPEAN STANDARD EN 62680-1 NORME EUROPENNE EUROPISCHE NORM December 2013 CENELEC European Committee for Electrotechnical Standardization Comit Euro
5、pen de Normalisation Electrotechnique Europisches Komitee fr Elektrotechnische Normung CEN-CENELEC Management Centre: Avenue Marnix 17, B - 1000 Brussels 2013 CENELEC - All rights of exploitation in any form and by any means reserved worldwide for CENELEC members. Ref. No. EN 62680-1:2013 E ICS 35.2
6、00 English version Universal serial bus interfaces for data and power - Part 1: Universal serial bus specification, revision 2.0 (IEC 62680-1:2013) Interfaces de bus universel en srie pour les donnes et lalimentation lectrique - Partie 1: Spcification du bus universel en srie, rvision 2.0 (CEI 62680
7、-1:2013) Schnittstellen des Universellen Seriellen Busses fr Daten und Energie - Teil 1: Festlegung des Universellen Seriellen Busses (IEC 62680-1:2013) This European Standard was approved by CENELEC on 2013-10-16. CENELEC members are bound to comply with the CEN/CENELEC Internal Regulations which s
8、tipulate 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 Centre or to any CENELEC member. This Eu
9、ropean 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 status as the official versions. CENELEC
10、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, Lithuania, Luxembourg, Malta, the Netherlands,
11、 Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and the United Kingdom. BS EN 62680-1:2013EN 62680-1:2013 - 2 - Foreword The text of document 100/2156/FDIS, future edition 1 of IEC 62680-1, prepared by IEC/TC 100, “Audio, video and multimedia systems and eq
12、uipment“ was submitted to the IEC-CENELEC parallel vote and approved by CENELEC as EN 62680-1:2013. 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) 2014-07-16 latest date
13、 by which the national standards conflicting with the document have to be withdrawn (dow) 2016-10-16 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
14、patent rights. Endorsement notice The text of the International Standard IEC 62680-1:2013 was approved by CENELEC as a European Standard without any modification. BS EN 62680-1:2013 4 62680-1 IEC:2013 USB-IF:2000 INTRODUCTION The IEC 62680 series is based on a series of specifications that were orig
15、inally 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 non-profit corporation founded by the group of companies that developed t
16、he 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-quality compatible USB peripherals (devices), and promotes the benefits of USB a
17、nd 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 PARTICULAR PURPOSE. THE USB IMPLEMENTERS FORUM AND THE AUTHORS OF ANY USB
18、 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 DOES NOT PROVIDE YOU WITH ANY LICENSE, EXPRESS OR IMPLIED, BY ESTOPPEL OR OTH
19、ERWISE, 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 information, please see: http:/www.usb.org/developers/docs/ http:/www.usb.org/d
20、evelopers/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 Series Bus interfaces for data and power and consists of the following pa
21、rts: IEC 62680-1, Universal Serial Bus interfaces for data and power - Part 1: Universal Serial Bus Specification, Revision 2.0 IEC 62680-2, Universal Serial Bus interfaces for data and power - Part 2: USB Micro-USB Cables and Connectors Specification, Revision 1.01 IEC 62680-3, Universal Serial Bus
22、 interfaces for data and power - Part 3: USB Battery Charging Specification, Revision 1.2 IEC 62680-4, Universal Serial Bus interfaces for data and power - Part 4: Universal Serial Bus Cables and Connectors Class Document Revision. 2.0 This part of the IEC 62680 series consists of several distinct p
23、arts: the main body of the text, which consists of the original specification and all ECN and Errata developed by the USB-IF; BS EN 62680-1:201362680-1 IEC:2013 5 USB-IF:2000 CONTENTS 1 Chapter 1 Introduction . 17 1.1 Motivation . 17 1.2 Objective of the Specification 17 1.3 Scope of the Document .
24、18 1.4 USB Product Compliance 18 1.5 Document Organization . 18 2 Chapter 2 Terms and Abbreviations . 19 3 Chapter 3 Background . 25 3.1 Goals for the Universal Serial Bus . 25 3.2 Taxonomy of Application Space. 25 3.3 Feature List . 26 4 Chapter 4 Architectural Overview 28 4.1 USB System Descriptio
25、n . 28 4.1.1 Bus Topology 28 4.2 Physical Interface 29 4.2.1 Electrical . 30 4.2.2 Mechanical 30 4.3 Power 30 4.3.1 Power Distribution . 31 4.3.2 Power Management . 31 4.4 Bus Protocol 31 4.5 Robustness . 31 4.5.1 Error Detection 32 4.5.2 Error Handling . 32 4.6 System Configuration 32 4.6.1 Attachm
26、ent of USB Devices . 32 4.6.2 Removal of USB Devices . 32 4.6.3 Bus Enumeration . 32 4.7 Data Flow Types . 33 4.7.1 Control Transfers . 33 4.7.2 Bulk Transfers . 33 4.7.3 Interrupt Transfers . 33 4.7.4 Isochronous Transfers . 33 4.7.5 Allocating USB Bandwidth . 34 4.8 USB Devices . 34 4.8.1 Device C
27、haracterizations . 34 4.8.2 Device Descriptions . 35 4.9 USB Host: Hardware and Software . 37 4.10 Architectural Extensions 37 5 Chapter 5 USB Data Flow Model 38 5.1 Implementer Viewpoints 38 5.2 Bus Topology 39 5.2.1 USB Host 40 5.2.2 USB Devices . 40 BS EN 62680-1:2013 6 62680-1 IEC:2013 USB-IF:20
28、00 5.2.3 Physical Bus Topology 41 5.2.4 Logical Bus Topology 42 5.2.5 Client Software-to-function Relationship 43 5.3 USB Communication Flow . 43 5.3.1 Device Endpoints. 45 5.3.2 Pipes . 46 5.3.3 Frames and Microframes . 48 5.4 Transfer Types 48 5.4.1 Table Calculation Examples 49 5.5 Control Transf
29、ers 50 5.5.1 Control Transfer Data Format 50 5.5.2 Control Transfer Direction . 51 5.5.3 Control Transfer Packet Size Constraints 51 5.5.4 Control Transfer Bus Access Constraints . 52 5.5.5 Control Transfer Data Sequences 54 5.6 Isochronous Transfers . 55 5.6.1 Isochronous Transfer Data Format 55 5.
30、6.2 Isochronous Transfer Direction 55 5.6.3 Isochronous Transfer Packet Size Constraints . 55 5.6.4 Isochronous Transfer Bus Access Constraints . 57 5.6.5 Isochronous Transfer Data Sequences 58 5.7 Interrupt Transfers. 58 5.7.1 Interrupt Transfer Data Format 58 5.7.2 Interrupt Transfer Direction 58
31、5.7.3 Interrupt Transfer Packet Size Constraints 58 5.7.4 Interrupt Transfer Bus Access Constraints . 59 5.7.5 Interrupt Transfer Data Sequences 62 5.8 Bulk Transfers . 62 5.8.1 Bulk Transfer Data Format . 62 5.8.2 Bulk Transfer Direction 62 5.8.3 Bulk Transfer Packet Size Constraints . 62 5.8.4 Bul
32、k Transfer Bus Access Constraints . 63 5.8.5 Bulk Transfer Data Sequences 64 5.9 High-Speed, High Bandwidth Endpoints 65 5.9.1 High Bandwidth Interrupt Endpoints . 65 5.9.2 High Bandwidth Isochronous Endpoints . 66 5.10 Split Transactions 67 5.11 Bus Access for Transfers 67 5.11.1 Transfer Managemen
33、t 68 5.11.2 Transaction Tracking . 70 5.11.3 Calculating Bus Transaction Times 72 5.11.4 Calculating Buffer Sizes in Functions and Software . 74 5.11.5 Bus Bandwidth Reclamation 74 5.12 Special Considerations for Isochronous Transfers . 74 5.12.1 Example Non-USB Isochronous Application . 75 5.12.2 U
34、SB Clock Model 77 BS EN 62680-1:201362680-1 IEC:2013 7 USB-IF:2000 5.12.3 Clock Synchronization . 79 5.12.4 Isochronous Devices . 79 5.12.5 Data Prebuffering 87 5.12.6 SOF Tracking 88 5.12.7 Error Handling . 88 5.12.8 Buffering for Rate Matching . 89 6 Chapter 6 Mechanical . 91 6.1 Architectural Ove
35、rview 91 6.2 Keyed Connector Protocol . 91 6.3 Cable 92 6.4 Cable Assembly 92 6.4.1 Standard Detachable Cable Assemblies 92 6.4.2 High-/full-speed Captive Cable Assemblies 94 6.4.3 Low-speed Captive Cable Assemblies . 96 6.4.4 Prohibited Cable Assemblies . 98 6.5 Connector Mechanical Configuration a
36、nd Material Requirements 98 6.5.1 USB Icon Location . 99 6.5.2 USB Connector Termination Data 99 6.5.3 Series “A” and Series “B” Receptacles . 100 6.5.4 Series “A” and Series “B” Plugs . 103 6.6 Cable Mechanical Configuration and Material Requirements . 106 6.6.1 Description 107 6.6.2 Construction 1
37、07 6.6.3 Electrical Characteristics . 110 6.6.4 Cable Environmental Characteristics . 110 6.6.5 Listing . 110 6.7 Electrical, Mechanical, and Environmental Compliance Standards . 110 6.7.1 Applicable Documents . 116 6.8 USB Grounding . 116 6.9 PCB Reference Drawings 116 7 Chapter 7 Electrical 120 7.
38、1 Signaling . 120 7.1.1 USB Driver Characteristics 123 7.1.2 Data Signal Rise and Fall, Eye Patterns 130 7.1.3 Cable Skew . 139 7.1.4 Receiver Characteristics 139 7.1.5 Device Speed Identification . 141 7.1.6 Input Characteristics 142 7.1.7 Signaling Levels 145 7.1.8 Data Encoding/Decoding . 158 7.1
39、.9 Bit Stuffing 158 7.1.10 Sync Pattern 160 7.1.11 Data Signaling Rate . 160 7.1.12 Frame Interval . 160 7.1.13 Data Source Signaling . 161 7.1.14 Hub Signaling Timings . 163 BS EN 62680-1:2013 8 62680-1 IEC:2013 USB-IF:2000 7.1.15 Receiver Data Jitter . 164 7.1.16 Cable Delay . 166 7.1.17 Cable Att
40、enuation 167 7.1.18 Bus Turn-around Time and Inter-packet Delay . 168 7.1.19 Maximum End-to-end Signal Delay 169 7.1.20 Test Mode Support 170 7.2 Power Distribution . 171 7.2.1 Classes of Devices 171 7.2.2 Voltage Drop Budget . 175 7.2.3 Power Control During Suspend/Resume 176 7.2.4 Dynamic Attach a
41、nd Detach . 177 7.3 Physical Layer . 178 7.3.1 Regulatory Requirements 178 7.3.2 Bus Timing/Electrical Characteristics . 178 7.3.3 Timing Waveforms . 188 8 Chapter 8 Protocol Layer 191 8.1 Byte/Bit Ordering . 191 8.2 SYNC Field . 191 8.3 Packet Field Formats 191 8.3.1 Packet Identifier Field 191 8.3
42、.2 Address Fields. 192 8.3.3 Frame Number Field 193 8.3.4 Data Field 193 8.3.5 Cyclic Redundancy Checks . 194 8.4 Packet Formats . 194 8.4.1 Token Packets . 194 8.4.2 Split Transaction Special Token Packets . 195 8.4.3 Start-of-Frame Packets 200 8.4.4 Data Packets . 201 8.4.5 Handshake Packets . 202
43、 8.4.6 Handshake Responses 203 8.5 Transaction Packet Sequences . 204 8.5.1 NAK Limiting via Ping Flow Control . 213 8.5.2 Bulk Transactions 217 8.5.3 Control Transfers . 222 8.5.4 Interrupt Transactions 225 8.5.5 Isochronous Transactions 225 8.6 Data Toggle Synchronization and Retry . 230 8.6.1 Ini
44、tialization via SETUP Token . 231 8.6.2 Successful Data Transactions 231 8.6.3 Data Corrupted or Not Accepted 231 8.6.4 Corrupted ACK Handshake 232 8.6.5 Low-speed Transactions 233 8.7 Error Detection and Recovery 234 8.7.1 Packet Error Categories 234 8.7.2 Bus Turn-around Timing 234 BS EN 62680-1:2
45、01362680-1 IEC:2013 9 USB-IF:2000 8.7.3 False EOPs . 235 8.7.4 Babble and Loss of Activity Recovery 236 9 Chapter 9 USB Device Framework 237 9.1 USB Device States 237 9.1.1 Visible Device States . 237 9.1.2 Bus Enumeration . 241 9.2 Generic USB Device Operations 241 9.2.1 Dynamic Attachment and Remo
46、val 242 9.2.2 Address Assignment 242 9.2.3 Configuration . 242 9.2.4 Data Transfer 243 9.2.5 Power Management . 243 9.2.6 Request Processing. 243 9.2.7 Request Error 245 9.3 USB Device Requests . 246 9.3.1 bmRequestType 246 9.3.2 bRequest . 246 9.3.3 wValue 246 9.3.4 wIndex . 247 9.3.5 wLength. 247
47、9.4 Standard Device Requests 247 9.4.1 Clear Feature 249 9.4.2 Get Configuration 250 9.4.3 Get Descriptor . 250 9.4.4 Get Interface . 251 9.4.5 Get Status . 251 9.4.6 Set Address . 253 9.4.7 Set Configuration . 253 9.4.8 Set Descriptor . 254 9.4.9 Set Feature . 254 9.4.10 Set Interface 255 9.4.11 Sy
48、nch Frame . 256 9.5 Descriptors 256 9.6 Standard USB Descriptor Definitions . 257 9.6.1 Device . 257 9.6.2 Device_Qualifier 259 9.6.3 Configuration . 259 9.6.4 Other_Speed_Configuration 261 9.6.5 Interface 261 9.6.6 Endpoint 263 9.6.7 String 266 9.7 Device Class Definitions 267 9.7.1 Descriptors 267
49、 9.7.2 Interface(s) and Endpoint Usage . 267 9.7.3 Requests . 268 10 Chapter 10 USB Host: Hardware and Software . 269 BS EN 62680-1:2013 10 62680-1 IEC:2013 USB-IF:2000 10.1 Overview of the USB Host . 269 10.1.1 Overview . 269 10.1.2 Control Mechanisms 272 10.1.3 Data Flow 272 10.1.4 Collecting Status and Activity Statistics . 273 10.1.5 Electrical Interface Considerations 273 10.2 Host Controller Requirements 273 10.2.1 State Handling . 273 10.2.2 Serializer/Deserializer . 274 10.2.3 Frame and Microframe
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