prEN IEC 62680-1-3:2022
(Main)Universal serial bus interfaces for data and power - Part 1-3: Common components - USB Type-C® cable and connector specification
Universal serial bus interfaces for data and power - Part 1-3: Common components - USB Type-C® cable and connector specification
IEC 62680-1-3:2022 defines the USB Type-C® receptacles, plug and cables. The USB Type-C Cable and Connector Specification is guided by the following principles: - Enable new and exciting host and device form-factors where size, industrial design and style are important parameters - Work seamlessly with existing USB host and device silicon solutions - Enhance ease of use for connecting USB devices with a focus on minimizing user confusion for plug and cable orientation The USB Type-C Cable and Connector Specification defines a new receptacle, plug, cable and detection mechanisms that are compatible with existing USB interface electrical and functional specifications. This specification covers the following aspects that are needed to produce and use this new USB cable/connector solution in newer platforms and devices, and that interoperate with existing platforms and devices: - USB Type-C receptacles, including electro-mechanical definition and performance requirements - USB Type-C plugs and cable assemblies, including electro-mechanical definition and performance requirements - USB Type-C to legacy cable assemblies and adapters - USB Type-C-based device detection and interface configuration, including support for legacy connections - USB Power Delivery optimized for the USB Type-C connector The USB Type-C Cable and Connector Specification defines a standardized mechanism that supports Alternate Modes, such as repurposing the connector for docking-specific applications. IEC 62680-1-3:2022 cancels and replaces the fourth edition published in 2021 and constitutes a technical revision. This standard is the USB-IF publication Universal Serial Bus Type-C Cable and Connector Specification Revision 2.0. New release primarily for enabling Extended Power Range (EPR) and defining EPR cables aligning with USB Power Delivery Specification R3.1 V1.0. Also includes incorporation of all approved ECNs as the revision date plus editorial clean-up.
Schnittstellen des Universellen Seriellen Busses für Daten und Energie - Teil 1-3: Gemeinsame Bauteile - Festlegung für USB-Typ-C®-Kabel und -Steckverbinder
Interfaces de bus universel en série pour les données et l'alimentation électrique - Partie 1-3: Composants communs - Spécification des câbles et des connecteurs USB Type-C®
L'IEC 62680-1-3:2022 définit les fiches et embases, ainsi que les câbles USB Type-C®. La spécification des câbles et connecteurs USB Type-C est guidée par les principes suivants: - Favoriser des critères de forme d'hôtes et de dispositifs innovants et agréables, où la taille, la conception industrielle et le style constituent des paramètres importants - Interagir en toute fluidité avec les solutions d'hôtes et de dispositifs USB silicium actuelles - Améliorer la facilité d'utilisation pour la connexion des dispositifs USB, en réduisant le plus possible le risque de confusion lors de l'insertion des connecteurs et des câbles La spécification des câbles et connecteurs USB Type-C définit de nouvelles techniques de connexion et de détection des ports et câbles USB, qui sont compatibles avec les spécifications électriques et fonctionnelles d'interface USB existantes. La présente spécification couvre les aspects suivants, qui sont nécessaires à la production et à l'utilisation de cette nouvelle solution de câble/connecteur USB pour les plateformes et dispositifs récents, et qui interagissent avec les plateformes et dispositifs actuels: - Les embases USB Type-C, notamment la description électromécanique et les exigences de performance - Les fiches et les ensembles câble-connecteurs USB Type-C, notamment la description électromécanique et les exigences de performance - Les ensembles câble-connecteurs et les adaptateurs USB Type-C vers existant - La configuration d'interface et la détection des dispositifs USB Type-C, notamment la prise en charge des connexions existantes - L'alimentation électrique par port USB optimisée pour les connecteurs USB Type-C La spécification des câbles et connecteurs USB Type-C définit une technique normalisée qui prend en charge les modes alternatifs, comme la reconversion du connecteur pour un usage spécifiquement lié au branchement. L'IEC 62680-1-3:2022 annule et remplace la quatrième édition publiée en 2021 et constitue une révision technique. La présente norme est la publication de l'USB-IF relative à la Spécification des câbles et connecteurs Universal Serial Bus de Type-C, révision 2.0. Nouvelle version essentiellement destinée à l'application de Extended Power Range (EPR) et définissant les câbles EPR conjointement avec la Spécification R3.1 V1.0 USB Power Delivery. Comprend également l'incorporation de l'ensemble des ECN approuvés à la date de révision, ainsi que les corrections rédactionnelles.
Vmesniki univerzalnega serijskega vodila za prenos podatkov in napajanje - 1-3. del: Skupne komponente - Specifikacija za kable in priključke univerzalnega serijskega vodila tipa C®
General Information
RELATIONS
Standards Content (sample)
SLOVENSKI STANDARD
oSIST prEN IEC 62680-1-3:2022
01-marec-2022
Vmesniki univerzalnega serijskega vodila za prenos podatkov in napajanje - 1-3.
del: Skupne komponente - Specifikacija za kable in priključke univerzalnega
serijskega vodila tipa C®
Universal serial bus interfaces for data and power - Part 1-3: Common components -
USB Type-C® Cable and Connector SpecificationSchnittstellen des Universellen Seriellen Busses für Daten und Energie – Teil 1-3:
Gemeinsame Bauteile – Festlegung für USB-Typ-CTM-Kabel und -SteckverbinderInterfaces de bus universel en série pour les données et l'alimentation électrique - Partie
1-3: Composants communs - Spécification des câbles et des connecteurs USB Type-C®
Ta slovenski standard je istoveten z: prEN IEC 62680-1-3:2022ICS:
35.200 Vmesniška in povezovalna Interface and interconnection
oprema equipment
oSIST prEN IEC 62680-1-3:2022 en,fr,de
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
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oSIST prEN IEC 62680-1-3:2022
100/3715/CDV
COMMITTEE DRAFT FOR VOTE (CDV)
PROJECT NUMBER:
IEC 62680-1-3 ED5
DATE OF CIRCULATION: CLOSING DATE FOR VOTING:
2022-01-28 2022-04-22
SUPERSEDES DOCUMENTS:
100/3707/RR
IEC TA 18 : MULTIMEDIA HOME SYSTEMS AND APPLICATIONS FOR END-USER NETWORKS
SECRETARIAT: SECRETARY:
Japan Mr Keisuke Koide
OF INTEREST TO THE FOLLOWING COMMITTEES: PROPOSED HORIZONTAL STANDARD:
Other TC/SCs are requested to indicate their interest,
if any, in this CDV to the secretary.
FUNCTIONS CONCERNED:
EMC ENVIRONMENT QUALITY ASSURANCE SAFETY
SUBMITTED FOR CENELEC PARALLEL VOTING NOT SUBMITTED FOR CENELEC PARALLEL VOTING
Attention IEC-CENELEC parallel votingThe attention of IEC National Committees, members
of CENELEC, is drawn to the fact that this Committee
Draft for Vote (CDV) is submitted for parallel voting.
The CENELEC members are invited to vote through
the CENELEC online voting system.
This document is still under study and subject to change. It should not be used for reference purposes.
Recipients of this document are invited to submit, with their comments, notification of any relevant patent
rights of which they are aware and to provide supporting documentation.TITLE:
Universal serial bus interfaces for data and power - Part 1-3: Common components - USB
Type-C® Cable and Connector SpecificationPROPOSED STABILITY DATE: 2026
NOTE FROM TC/SC OFFICERS:
Copyright © 2021 International Electrotechnical Commission, IEC. All rights reserved. It is permitted to download this
electronic file, to make a copy and to print out the content for the sole purpose of preparing National Committee positions.
You may not copy or "mirror" the file or printed version of the document, or any part of it, for any other purpose without
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oSIST prEN IEC 62680-1-3:2022
IEC CDV 62680-1-3 Ed 5 ©IEC 2021 - 2 - USB Type-C Cable and
May 2021 Connector Specification
Only the cover page was created by TA18.
For the main body, the document (USB Type-C Spec R2.1 - May 2021.docx) supplied from USB-
IF was uploaded as "CDV additional file (s):".Please have the IEC Central Office convert it to the IEC prescribed format.
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oSIST prEN IEC 62680-1-3:2022
IEC CDV 62680-1-3 Ed 5 ©IEC 2021 - 3 - USB Type-C Cable and
May 2021 Connector Specification
8 Universal Serial Bus
9 Type-C Cable and Connector
10 Specification
14 Release 2.1
15 May 2021
Copyright © 2021 USB 3.0 Promoter Group. All rights reserved.
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oSIST prEN IEC 62680-1-3:2022
IEC CDV 62680-1-3 Ed 5 ©IEC 2021 - 4 - USB Type-C Cable and
May 2021 Connector Specification
20 Copyright © 2014-2021, USB 3.0 Promoter Group:
21 Apple Inc., HP Inc., Intel Corporation, Microsoft
22 Corporation, Renesas, STMicroelectronics, and Texas Instruments
23 All rights reserved.
26 NOTE: Adopters may only use the USB Type-C cable and connector to implement USB or third-
27 party functionality as expressly described in this Specification; all other uses are prohibited.
28 LIMITED COPYRIGHT LICENSE: The USB 3.0 Promoters grant a conditional copyright license under
29 the copyrights embodied in the USB Type-C Cable and Connector Specification to use and reproduce
30 the Specification for the sole purpose of, and solely to the extent necessary for, evaluating whether to
31 implement the Specification in products that would comply with the specification. Without limiting
32 the foregoing, use of the Specification for the purpose of filing or modifying any patent application to
33 target the Specification or USB compliant products is not authorized. Except for this express
34 copyright license, no other rights or licenses are granted, including without limitation any patent
35 licenses. In order to obtain any additional intellectual property licenses or licensing commitments
36 associated with the Specification a party must execute the USB 3.0 Adopters Agreement. NOTE: By
37 using the Specification, you accept these license terms on your own behalf and, in the case where you
38 are doing this as an employee, on behalf of your employer.41 INTELLECTUAL PROPERTY DISCLAIMER
42 THIS SPECIFICATION IS PROVIDED TO YOU “AS IS” WITH NO WARRANTIES WHATSOEVER,
43 INCLUDING ANY WARRANTY OF MERCHANTABILITY, NON-INFRINGEMENT, OR FITNESS
44 FOR ANY PARTICULAR PURPOSE. THE AUTHORS OF THIS SPECIFICATION DISCLAIM ALL
45 LIABILITY, INCLUDING LIABILITY FOR INFRINGEMENT OF ANY PROPRIETARY RIGHTS,
46 RELATING TO USE OR IMPLEMENTATION OF INFORMATION IN THIS SPECIFICATION. THE
47 PROVISION OF THIS SPECIFICATION TO YOU DOES NOT PROVIDE YOU WITH ANY LICENSE,
48 EXPRESS OR IMPLIED, BY ESTOPPEL OR OTHERWISE, TO ANY INTELLECTUAL PROPERTY
49 RIGHTS.
50 All implementation examples and reference designs contained within this Specification are
51 included as part of the limited patent license for those companies that execute the USB 3.0
52 Adopters Agreement.® ®
55 USB Type-C , USB-C and USB4™ are trademarks of the Universal Serial Bus Implementers
56 Forum (USB-IF). DisplayPort™ is a trademark of VESA. All product names are trademarks,
57 registered trademarks, or service marks of their respective owners.58 Thunderbolt™ is a trademark of Intel Corporation. You may only use the Thunderbolt™
59 trademark or logo in conjunction with products designed to this specification that complete
60 proper certification and executing a Thunderbolt™ trademark license – see61 usb.org/compliance for further information.
Copyright © 2021 USB 3.0 Promoter Group. All rights reserved.
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oSIST prEN IEC 62680-1-3:2022
IEC CDV 62680-1-3 Ed 5 ©IEC 2021 - 5 - USB Type-C Cable and
May 2021 Connector Specification
62 CONTENTS
63 Specification Work Group Chairs / Specification Editors .................................................... 18
64 Specification Work Group Contributors .................................................................................... 18
65 Pre-Release Draft Industry Reviewing Companies That Provided Feedback ................. 25
66 Revision History ................................................................................................................................ 25
67 1 Introduction ............................................................................................................................... 26
68 1.1 Purpose ............................................................................................................................ 26
69 1.2 Scope ................................................................................................................................. 26
70 1.3 Related Documents....................................................................................................... 27
71 Conventions .................................................................................................................... 27
1.472 1.4.1 Precedence ...................................................................................................... 27
73 1.4.2 Keywords ......................................................................................................... 27
74 1.4.3 Numbering ....................................................................................................... 28
75 1.5 Terms and Abbreviations ........................................................................................... 28
76 2 Overview ..................................................................................................................................... 33
77 2.1 Introduction ................................................................................................................... 33
78 USB Type-C Receptacles, Plugs and Cables ........................................................... 34
2.279 2.3 Configuration Process ................................................................................................. 35
80 2.3.1 Source-to-Sink Attach/Detach Detection ............................................... 36
81 2.3.2 Plug Orientation/Cable Twist Detection ................................................ 36
82 2.3.3 Initial Power (Source-to-Sink) Detection and Establishing the Data83 (Host-to-Device) Relationship ................................................................... 36
84 2.3.4 USB Type-C VBUS Current Detection and Usage ................................... 37
85 2.3.5 USB PD Communication ............................................................................... 38
86 2.3.6 Functional Extensions .................................................................................. 38
87 2.4 VBUS ................................................................................................................................... 38
88 2.5 VCONN ................................................................................................................................ 39
89 Hubs .................................................................................................................................. 40
2.690 3 Mechanical .................................................................................................................................. 41
91 3.1 Overview ......................................................................................................................... 41
92 3.1.1 Compliant Connectors .................................................................................. 41
93 3.1.2 Compliant Cable Assemblies ...................................................................... 41
94 3.1.3 Compliant USB Type-C to Legacy Cable Assemblies ........................... 42
95 3.1.4 Compliant USB Type-C to Legacy Adapter Assemblies ...................... 43
96 3.2 USB Type-C Connector Mating Interfaces ............................................................. 43
97 3.2.1 Interface Definition....................................................................................... 43
98 3.2.2 Reference Designs ......................................................................................... 66
99 3.2.3 Pin Assignments and Descriptions ........................................................... 73
100 3.3 Cable Construction and Wire Assignments ........................................................... 74
101 3.3.1 Cable Construction (Informative) ............................................................ 74
102 3.3.2 Wire Assignments ......................................................................................... 76
103 3.3.3 Wire Gauges and Cable Diameters (Informative) ................................ 77
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May 2021 Connector Specification
104 3.4 Standard USB Type-C Cable Assemblies ................................................................ 79
105 3.4.1 USB Full-Featured Type-C Cable Assembly ........................................... 79
106 3.4.2 USB 2.0 Type-C Cable Assembly ................................................................ 80
107 3.4.3 USB Type-C Captive Cable Assemblies .................................................... 81
108 3.4.4 USB Type-C Thumb Drive Assemblies ..................................................... 81
109 3.5 Legacy Cable Assemblies ............................................................................................ 82
110 3.5.1 USB Type-C to USB 3.1 Standard-A Cable Assembly ........................... 82
111 3.5.2 USB Type-C to USB 2.0 Standard-A Cable Assembly ........................... 84
112 3.5.3 USB Type-C to USB 3.1 Standard-B Cable Assembly ........................... 85
113 3.5.4 USB Type-C to USB 2.0 Standard-B Cable Assembly ........................... 86
114 3.5.5 USB Type-C to USB 2.0 Mini-B Cable Assembly .................................... 87
115 3.5.6 USB Type-C to USB 3.1 Micro-B Cable Assembly .................................. 88
116 3.5.7 USB Type-C to USB 2.0 Micro-B Cable Assembly .................................. 90
117 3.6 Legacy Adapter Assemblies ....................................................................................... 91
118 3.6.1 USB Type-C to USB 3.1 Standard-A Receptacle Adapter Assembly 91119 3.6.2 USB Type-C to USB 2.0 Micro-B Receptacle Adapter Assembly ....... 93
120 3.7 Electrical Characteristics ........................................................................................... 94
121 3.7.1 Raw Cable (Informative) ............................................................................. 94
122 3.7.2 USB Type-C to Type-C Passive Cable Assemblies (Normative) ....... 95123 3.7.3 Mated Connector (Informative – USB 3.2 Gen2 and USB4 Gen2) 117
124 3.7.4 Receptacle Connector SI Requirements and Testing (Normative –
125 USB4 Gen3) ................................................................................................... 120
126 3.7.5 USB Type-C to Legacy Cable Assemblies (Normative) .................... 121
127 3.7.6 USB Type-C to USB Legacy Adapter Assemblies (Normative) ...... 125128 3.7.7 Shielding Effectiveness Requirements (Normative) ........................ 127
129 3.7.8 DC Electrical Requirements (Normative) ........................................... 130
130 3.8 Mechanical and Environmental Requirements (Normative) ........................ 133
131 3.8.1 Mechanical Requirements ........................................................................ 134
132 3.8.2 Environmental Requirements................................................................. 139
133 3.9 Docking Applications (Informative) .................................................................... 140
134 3.10 Implementation Notes and Design Guides ......................................................... 141
135 3.10.1 EMC Management (Informative)............................................................ 141
136 3.10.2 Stacked and Side-by-Side Connector Physical Spacing (Informative)137 .......................................................................................................................... 144
138 3.10.3 Cable Mating Considerations (Informative) ....................................... 144
139 3.11 Extended Power Range (EPR) Cables .................................................................. 145
140 3.11.1 Electrical Requirements ........................................................................... 145
141 3.11.2 EPR Cable Indentification Requirements ............................................ 145
142 4 Functional ................................................................................................................................ 146
143 4.1 Signal Summary .......................................................................................................... 146
144 4.2 Signal Pin Descriptions ............................................................................................ 146
145 4.2.1 SuperSpeed USB Pins ................................................................................ 146
146 4.2.2 USB 2.0 Pins ................................................................................................. 147
147 4.2.3 Auxiliary Signal Pins .................................................................................. 147
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May 2021 Connector Specification
148 4.2.4 Power and Ground Pins ............................................................................ 147
149 4.2.5 Configuration Pins ..................................................................................... 147
150 4.3 Sideband Use (SBU)................................................................................................... 147
151 4.4 Power and Ground ..................................................................................................... 148
152 4.4.1 IR Drop........................................................................................................... 148
153 4.4.2 VBUS................................................................................................................. 149
154 4.4.3 VCONN .............................................................................................................. 151
155 4.5 Configuration Channel (CC) .................................................................................... 157
156 4.5.1 Architectural Overview ............................................................................ 157
157 4.5.2 CC Functional and Behavioral Requirements .................................... 170
158 4.5.3 USB Port Interoperability Behavior ...................................................... 208
159 4.6 Power............................................................................................................................. 227
160 4.6.1 Power Requirements during USB Suspend ......................................... 228
161 4.6.2 VBUS Power Provided Over a USB Type-C Cable ............................... 229
162 4.7 USB Hubs ...................................................................................................................... 235
163 4.8 Power Sourcing and Charging ................................................................................ 236
164 4.8.1 DFP as a Power Source ............................................................................. 236
165 4.8.2 Non-USB Charging Methods .................................................................... 239
166 4.8.3 Sinking Host ................................................................................................. 239
167 4.8.4 Sourcing Device ........................................................................................... 239
168 4.8.5 Charging a System with a Dead Battery .............................................. 239
169 4.8.6 USB Type-C Multi-Port Chargers ........................................................... 239
170 4.9 Electronically Marked Cables ................................................................................. 242
171 4.9.1 Parameter Values ....................................................................................... 244
172 4.9.2 Active Cables ................................................................................................ 244
173 4.10 VCONN-Powered Accessories (VPAs) and VCONN-Powered USB Devices174 (VPDs) ........................................................................................................................... 244
175 4.10.1 VCONN-Powered Accessories (VPAs) ..................................................... 244
176 4.10.2 VCONN-Powered USB Devices (VPDs) ................................................... 245
177 4.11 Parameter Values ....................................................................................................... 247
178 4.11.1 Termination Parameters .......................................................................... 247
179 4.11.2 Timing Parameters ..................................................................................... 249
180 4.11.3 Voltage Parameters .................................................................................... 252
181 5 USB4 Discovery and Entry .................................................................................................. 254
182 5.1 Overview of the Discovery and Entry Process .................................................. 254
183 5.2 USB4 Functional Requirements ............................................................................. 255
184 5.2.1 USB4 Host Functional Requirements ................................................... 255
185 5.2.2 USB4 Device Functional Requirements ............................................... 255
186 5.2.3 USB4 Alternate Mode Support ................................................................ 255
187 5.2.3.1 USB4 Alternate Mode Support on Hosts .............................................. 255
188 5.2.3.2 USB4 Alternate Mode Support on Hubs and USB4-based Docks .. 255189 5.3 USB4 Power Requirements ..................................................................................... 256
190 5.3.1 Source Power Requirements ................................................................... 256
191 5.3.2 Sink Power Requirements ....................................................................... 256
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IEC CDV 62680-1-3 Ed 5 ©IEC 2021 - 8 - USB Type-C Cable and
May 2021 Connector Specification
192 5.3.3 Device Power Management Requirements ......................................... 257
193 5.4 USB4 Discovery and Entry Flow Requirements ............................................... 257
194 5.4.1 USB Type-C Initial Connection ............................................................... 257
195 5.4.2 USB Power Delivery Contract ................................................................. 257
196 5.4.3 USB4 Discovery and Entry Flow ............................................................ 258
197 5.4.3.1 USB4 Device Discovery (SOP) ................................................................. 259
198 5.4.3.2 USB4 Cable Discovery (SOP’) .................................................................. 259
199 5.4.3.3 USB4 Operational Entry ........................................................................... 262
200 5.4.4 USB4 Post-Entry Operation ..................................................................... 262
201 5.4.4.1 During USB4 Operation ............................................................................ 262
202 5.4.4.2 Exiting USB4 Operation ............................................................................ 262
203 5.5 USB4 Hub Connection Requirements .................................................................. 263
204 5.5.1 USB4 Hub Port Initial Connection Requirements ............................. 263
205 5.5.2 USB4 Hub UFP and Host Capabilities Discovery ............................... 263
206 5.5.3 Hub DFP Connection Requirements ...................................................... 264
207 5.5.3.1 Speculative Connections .......................................................................... 264
208 5.5.3.2 Operational Connections .......................................................................... 264
209 5.5.4 Hub Ports Connection Behavior Flow Examples ............................... 265
210 5.5.5 Connecting to Downstream USB4 Hubs ............................................... 270
211 5.5.6 Fallback Functional Requirements for USB4 Hubs .......................... 270
212 5.6 USB4 Device Connection Requirements ............................................................. 271
213 5.6.1 Fallback Mapping of USB4 Peripheral Functions to USB Device214 Class Types ................................................................................................... 271
215 5.7 Parameter Values ....................................................................................................... 272
216 5.7.1 Timing Parameters ..................................................................................... 272
217 6 Active Cables ........................................................................................................................... 273
218 6.1 USB Type-C State Machine ...................................................................................... 275
219 6.2 USB PD Requirements .............................................................................................. 275
220 6.2.1 Active Cable USB PD Requirements ...................................................... 277
221 6.2.2 USB PD Messages for OIAC ...................................................................... 278
222 6.2.3 Short Active Cable Behaviors in Response to Power Delivery223 Events............................................................................................................. 290
224 6.3 OIAC Connection Flow and State Diagrams ....................................................... 290
225 6.3.1 OIAC Connection Flow – Discovery – Phase 1 ................................... 291
226 6.3.2 OIAC Connection Flow – Reboot – Phase 2 ......................................... 292
227 6.3.3 OIAC Connection Flow – Configuration – Phase 3 ............................ 293
228 6.3.4 OIAC Connection State Diagram Plug-A ............................................... 296
229 6.3.5 OIAC Connection State Diagram Plug-B ............................................... 304
230 6.4 Active Cable Power Requirements ....................................................................... 309
231 6.4.1 VBUS Requirements .................................................................................... 309
232 6.4.2 OIAC VBUS Requirements .......................................................................... 309
233 6.4.3 USB PD Rules in Active State .................................................................. 311
234 6.4.4 VCONN Requirements ................................................................................. 312
235 6.5 Mechanical ................................................................................................................... 312
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May 2021 Connector Specification
236 6.5.1 Thermal ......................................................................................................... 312
237 6.5.2 Plug Spacing ................................................................................................. 313
238 6.6 Electrical Requirements .......................................................................................... 313
239 6.6.1 Shielding Effectiveness Requirement ................................................... 313
240 6.6.2 Low Speed Signal Requirement .............................................................. 313
241 6.6.3 USB 2.0 ........................................................................................................... 314
242 6.6.4 USB 3.2 ........................................................................................................... 315
243 6.6.5 USB4 ............................................................................................................... 322
244 6.6.6 Return Loss .................................................................................................. 336
245 6.7 Active Cables That Support Alternate Modes .................................................... 336
246 6.7.1 Discover SVIDs ............................................................................................ 336
247 6.7.2 Discover Modes ........................................................................................... 336
248 6.7.3 Enter/Exit Modes ....................................................................................... 336
249 6.7.4 Power in Alternate Modes ....................................................................... 336
250 A Audio Adapter Accessory Mode ........................................................................................ 337
251 A.1 Overview ...................................................................................................................... 337
252 A.2 Detail ............................................................................................................................. 337
253 A.3 Electrical Requirements .......................................................................................... 338
254 A.4 Example Implementations ......................
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