BS EN IEC 62680-1-3:2018 – TC:2020 Edition
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Tracked Changes. Universal serial bus interfaces for data and power – Common components. USB Type-CTM Cable and Connector Specification
Published By | Publication Date | Number of Pages |
BSI | 2020 | 617 |
IEC 62680-1-3:2018 defines the USB Type-C™ receptacles, plug and cables. 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. This specification is intended as a supplement to the existing USB 2.0, USB 3.1 and USB Power Delivery specifications. It addresses only the elements required to implement and support the USB Type-C receptacles, plugs and cables. Normative information is provided to allow interoperability of components designed to this specification. Informative information, when provided, may illustrate possible design implementations. This third edition cancels and replaces the second edition published in 2017 and constitutes a technical revision.
PDF Catalog
PDF Pages | PDF Title |
---|---|
355 | undefined |
358 | FOREWORD |
360 | INTRODUCTION |
363 | CONTENTS |
376 | 1 Introduction 1.1 Purpose 1.2 Scope |
377 | 1.3 Related Documents 1.4 Conventions 1.4.1 Precedence 1.4.2 Keywords |
378 | 1.4.3 Numbering 1.5 Terms and Abbreviations |
381 | 2 Overview 2.1 Introduction |
382 | 2.2 USB Type-C Receptacles, Plugs and Cables Figures Figure 2-1 USB Type-C Receptacle Interface (Front View) Figure 2-2 USB Full-Featured Type-C Plug Interface (Front View) |
384 | 2.3 Configuration Process 2.3.1 Source-to-Sink Attach/Detach Detection 2.3.2 Plug Orientation/Cable Twist Detection |
385 | 2.3.3 Initial Power (Source-to-Sink) Detection and Establishing the Data (Host-to-Device) Relationship |
386 | 2.3.4 USB Type-C Vbus Current Detection and Usage 2.3.5 USB PD Communication 2.3.6 Functional Extensions |
387 | 2.4 Vbus 2.5 Vconn Table 2-1 Summary of power supply options |
388 | 2.6 Hubs 3 Mechanical 3.1 Overview 3.1.1 Compliant Connectors 3.1.2 Compliant Cable Assemblies 3.1.3 Compliant USB Type-C to Legacy Cable Assemblies Tables Table 3-1 USB Type-C Standard Cable Assemblies |
389 | 3.1.4 Compliant USB Type-C to Legacy Adapter Assemblies Table 3-2 USB Type-C Legacy Cable Assemblies |
390 | 3.2 USB Type-C Connector Mating Interfaces 3.2.1 Interface Definition Table 3-3 USB Type-C Legacy Adapter Assemblies |
393 | Figure 3-1 USB Type-C Receptacle Interface Dimensions |
396 | Figure 3-2 Reference Design USB Type-C Plug External EMC Spring Contact Zones |
397 | Figure 3-3 USB Full-Featured Type-C Plug Interface Dimensions |
400 | Figure 3-4 Reference Footprint for a USB Type-C Vertical Mount Receptacle (Informative) |
401 | Figure 3-5 Reference Footprint for a USB Type-C Dual-Row SMT Right Angle Receptacle (Informative) |
402 | Figure 3-6 Reference Footprint for a USB Type-C Hybrid Right-Angle Receptacle (Informative) |
403 | Figure 3-7 Reference Footprint for a USB Type-C Mid-Mount Dual-Row SMT Receptacle (Informative) |
404 | Figure 3-8 Reference Footprint for a USB Type-C Mid-Mount Hybrid Receptacle (Informative) |
405 | Figure 3-9 Reference Footprint for a USB 2.0 Type-C Through Hole Right Angle Receptacle (Informative) |
406 | Figure 3-10 Reference Footprint for a USB 2.0 Type-C Single Row Right Angle Receptacle (Informative) |
408 | Figure 3-11 USB 2.0 Type-C Plug Interface Dimensions |
411 | Figure 3-12 USB Type-C Plug EMC Shielding Spring Tip Requirements |
412 | 3.2.2 Reference Designs Figure 3-13 Reference Design of Receptacle Mid-Plate |
413 | Figure 3-14 Reference Design of the Retention Latch Figure 3-15 Illustration of the Latch Soldered to the Paddle Card Ground |
414 | Figure 3-16 Reference Design of the USB Full-Featured Type-C Plug Internal EMC Spring |
415 | Figure 3-17 Reference Design of the USB 2.0 Type-C Plug Internal EMC Spring |
417 | Figure 3-18 Reference Design of Internal EMC Pad |
418 | Figure 3-19 Reference Design of a USB Type-C Receptacle with External EMC Springs |
419 | Figure 3-20 Reference Design for a USB Full-Featured Type-C Plug Paddle Card |
420 | 3.2.3 Pin Assignments and Descriptions Table 3-4 USB Type-C Receptacle Interface Pin Assignments |
421 | 3.3 Cable Construction and Wire Assignments 3.3.1 Cable Construction (Informative) Table 3-5 USB Type-C Receptacle Interface Pin Assignments for USB 2.0-only Support |
422 | Figure 3-21 Illustration of a USB Full-Featured Type-C Cable Cross Section,a Coaxial Wire Example with Vconn Figure 3-22 Illustration of a USB Full-Featured Type-C Cable Cross Section,a Coaxial Wire Example without Vconn |
423 | 3.3.2 Wire Assignments Table 3-6 USB Type-C Standard Cable Wire Assignments |
424 | 3.3.3 Wire Gauges and Cable Diameters (Informative) Table 3-7 USB Type-C Cable Wire Assignments for Legacy Cables/Adapters |
425 | Table 3-8 Reference Wire Gauges for standard USB Type-C Cable Assemblies Table 3-9 Reference Wire Gauges for USB Type-C to Legacy Cable Assemblies |
426 | 3.4 Standard USB Type-C Cable Assemblies 3.4.1 USB Full-Featured Type-C Cable Assembly Figure 3-23 USB Full-Featured Type-C Standard Cable Assembly |
427 | 3.4.2 USB 2.0 Type-C Cable Assembly Table 3-10 USB Full-Featured Type-C Standard Cable Assembly Wiring |
428 | 3.4.3 USB Type-C Captive Cable Assemblies 3.5 Legacy Cable Assemblies Table 3-11 USB 2.0 Type-C Standard Cable Assembly Wiring |
429 | 3.5.1 USB Type-C to USB 3.1 Standard-A Cable Assembly Figure 3-24 USB Type-C to USB 3.1 Standard-A Cable Assembly |
430 | Table 3-12 USB Type-C to USB 3.1 Standard-A Cable Assembly Wiring |
431 | 3.5.2 USB Type-C to USB 2.0 Standard-A Cable Assembly Figure 3-25 USB Type-C to USB 2.0 Standard-A Cable Assembly Table 3-13 USB Type-C to USB 2.0 Standard-A Cable Assembly Wiring |
432 | 3.5.3 USB Type-C to USB 3.1 Standard-B Cable Assembly Figure 3-26 USB Type-C to USB 3.1 Standard-B Cable Assembly |
433 | Table 3-14 USB Type-C to USB 3.1 Standard-B Cable Assembly Wiring |
434 | 3.5.4 USB Type-C to USB 2.0 Standard-B Cable Assembly Figure 3-27 USB Type-C to USB 2.0 Standard-B Cable Assembly Table 3-15 USB Type-C to USB 2.0 Standard-B Cable Assembly Wiring |
435 | 3.5.5 USB Type-C to USB 2.0 Mini-B Cable Assembly Figure 3-28 USB Type-C to USB 2.0 Mini-B Cable Assembly Table 3-16 USB Type-C to USB 2.0 Mini-B Cable Assembly Wiring |
436 | 3.5.6 USB Type-C to USB 3.1 Micro-B Cable Assembly Figure 3-29 USB Type-C to USB 3.1 Micro-B Cable Assembly |
437 | Table 3-17 USB Type-C to USB 3.1 Micro-B Cable Assembly Wiring |
438 | 3.5.7 USB Type-C to USB 2.0 Micro-B Cable Assembly Figure 3-30 USB Type-C to USB 2.0 Micro-B Cable Assembly Table 3-18 USB Type-C to USB 2.0 Micro-B Cable Assembly Wiring |
439 | 3.6 Legacy Adapter Assemblies 3.6.1 USB Type-C to USB 3.1 Standard-A Receptacle Adapter Assembly Figure 3-31 USB Type-C to USB 3.1 Standard-A Receptacle Adapter Assembly |
440 | Table 3-19 USB Type-C to USB 3.1 Standard-A Receptacle Adapter Assembly Wiring |
441 | 3.6.2 USB Type-C to USB 2.0 Micro-B Receptacle Adapter Assembly Figure 3-32 USB Type-C to USB 2.0 Micro-B Receptacle Adapter Assembly Table 3-20 USB Type-C to USB 2.0 Micro-B Receptacle Adapter Assembly Wiring |
442 | 3.7 Electrical Characteristics 3.7.1 Raw Cable (Informative) Table 3-21 Differential Insertion Loss Examples for USB SuperSpeedwith Twisted Pair Construction |
443 | 3.7.2 USB Type-C to Type-C Passive Cable Assemblies (Normative) Figure 3-33 Illustration of Test Points for a Mated Cable Assembly Table 3-22 Differential Insertion Loss Examples for USB SuperSpeedwith Coaxial Construction |
444 | Figure 3-34 Recommended Differential Insertion Loss Requirement Figure 3-35 Recommended Differential Return Loss Requirement |
445 | Figure 3-36 Recommended Differential Crosstalk Requirement Figure 3-37 Recommended Differential Near-End and Far-End Crosstalk Requirement between USB D+/D− Pair and USB SuperSpeed Pair |
446 | Figure 3-38 Illustration of Insertion Loss Fit at Nyquist Frequency |
447 | Figure 3-39 Input Pulse Spectrum |
448 | Figure 3-40 IMR Limit as Function of ILfitatNq |
450 | Figure 3-41 IRL Limit as Function of ILfitatNq |
451 | Figure 3-42 Differential-to-Common-Mode Conversion Requirement Table 3-23 Electrical Requirements for CC and SBU wires |
452 | Figure 3-43 Requirement for Differential Coupling between CC and D+/D− Table 3-24 Coupling Matrix for Low Speed Signals |
453 | Figure 3-44 Requirement for Single-Ended Coupling between CCand D− in USB 2.0 Type-C Cables Figure 3-45 Requirement for Single-Ended Coupling between CCand D− in USB Full-Featured Type-C Cables |
454 | Figure 3-46 Requirement for Differential Coupling between Vbus and D+/D− Table 3-25 Maximum Mutual Inductance (M) between Vbus and Low Speed Signal Lines |
455 | Figure 3-47 Requirement for Single-Ended Coupling between SBU_A and SBU_B Figure 3-48 Requirement for Single-Ended Coupling between SBU_A/SBU_B and CC |
456 | Figure 3-49 Requirement for Coupling between SBU_A and differential D+/D−,and SBU_B and differential D+/D− Table 3-26 USB D+/D− Signal Integrity Requirements for USB Type-C to USB Type-C Passive Cable Assemblies |
457 | 3.7.3 Mated Connector (Informative) Figure 3-50 Illustration of USB Type-C Mated Connector |
458 | Figure 3-51 Recommended Impedance Limits of a USB Type-C Mated Connector |
459 | Figure 3-52 Recommended Ground Void Dimensions for USB Type-C Receptacle |
460 | Table 3-27 USB Type-C Mated Connector Recommended Signal Integrity Characteristics (Informative) |
461 | 3.7.4 USB Type-C to Legacy Cable Assemblies (Normative) Figure 3-53 Recommended Differential Near-End and Far-End Crosstalk Limitsbetween D+/D− Pair and SuperSpeed Pairs Figure 3-54 Recommended Limits for Differential-to-Common-Mode Conversion |
462 | Table 3-28 USB D+/D− Signal Integrity Requirements for USB Type-Cto Legacy USB Cable Assemblies |
463 | Table 3-29 Design Targets for USB Type-C to USB 3.1 Gen 2 Legacy Cable Assemblies (Informative) Table 3-30 USB Type-C to USB 3.1 Gen 2 Legacy Cable Assembly Signal Integrity Requirements (Normative) |
464 | Figure 3-55 IMR Limit as Function of ILfitatNq for USB Type-C to Legacy Cable Assembly |
465 | 3.7.5 USB Type-C to USB Legacy Adapter Assemblies (Normative) Figure 3-56 IRL Limit as Function of ILfitatNq for USB Type-C to Legacy Cable Assembly |
466 | Table 3-31 USB D+/D− Signal Integrity Requirements for USB Type-C to Legacy USB Adapter Assemblies (Normative) Table 3-32 Design Targets for USB Type-C to USB 3.1 Standard-A Adapter Assemblies (Informative) |
467 | Table 3-33 USB Type-C to USB 3.1 Standard-A Receptacle Adapter Assembly Signal Integrity Requirements (Normative) |
468 | 3.7.6 Shielding Effectiveness Requirements (Normative) Figure 3-57 Cable Assembly Shielding Effectiveness Testing |
469 | Figure 3-58 Shielding Effectiveness Pass/Fail Criteria |
470 | 3.7.7 DC Electrical Requirements (Normative) Figure 3-59 LLCR Measurement Diagram |
472 | Figure 3-60 Temperature Measurement Point Table 3-34 Current Rating Test PCB |
473 | 3.8 Mechanical and Environmental Requirements (Normative) 3.8.1 Mechanical Requirements Figure 3-61 Example Current Rating Test Fixture Trace Configuration |
475 | Figure 3-62 Example of 4-Axis Continuity Test Fixture |
476 | Table 3-35 Force and Moment Requirements |
477 | Figure 3-63 Example Wrenching Strength Test Fixture for Plugs without Overmold |
478 | Figure 3-64 Reference Wrenching Strength Continuity Test Fixture |
479 | 3.8.2 Environmental Requirements Figure 3-65 Example of Wrenching Strength Test Mechanical Failure Point Figure 3-66 Wrenching Strength Test with Cable in Fixture |
480 | Table 3-36 Environmental Test Conditions |
481 | 3.9 Docking Applications (Informative) Table 3-37 Reference Materials |
482 | 3.10 Implementation Notes and Design Guides 3.10.1 EMC Management (Informative) Figure 3-67 USB Type-C Cable Receptacle Flange Example |
483 | Figure 3-68 EMC Guidelines for Side Latch and Mid-plate Figure 3-69 EMC Finger Connections to Plug Shell |
484 | 3.10.2 Stacked and Side-by-Side Connector Physical Spacing (Informative) Figure 3-70 EMC Pad Connections to Receptacle Shell Figure 3-71 Examples of Connector Apertures |
485 | 3.10.3 Cable Mating Considerations (Informative) Figure 3-72 Recommended Minimum Spacing between Connectors Figure 3-73 Recommended Minimum Plug Overmold Clearance |
486 | 4 Functional 4.1 Signal Summary Figure 3-74 Cable Plug Overmold and an Angled Surface Table 4-1 USB Type-C List of Signals |
487 | 4.2 Signal Pin Descriptions 4.2.1 SuperSpeed USB Pins 4.2.2 USB 2.0 Pins 4.2.3 Auxiliary Signal Pins 4.2.4 Power and Ground Pins 4.2.5 Configuration Pins |
488 | 4.3 Sideband Use (SBU) 4.4 Power and Ground 4.4.1 IR Drop Figure 4-1 Cable IR Drop |
489 | 4.4.2 Vbus Figure 4-2 Cable IR Drop for powered cables Table 4-2 Vbus Source Characteristics |
490 | 4.4.3 Vconn Table 4-3 Vbus Sink Characteristics |
491 | Table 4-4 USB Type-C Source Port’s Vconn Requirements Summary Table 4-5 Vconn Source Characteristics |
492 | Table 4-6 Cable Vconn Sink Characteristics |
493 | Table 4-7 Vconn-Powered Accessory (VPA) Sink Characteristics |
494 | 4.5 Configuration Channel (CC) 4.5.1 Architectural Overview Table 4-8 Vconn-Powered USB Device (VPD) Sink Characteristics |
496 | Figure 4-3 Logical Model for Data Bus Routing across USB Type-C-based Ports Figure 4-4 Logical Model for USB Type-C-based Ports for the Direct Connect Device |
497 | Table 4-9 USB Type-C-based Port Interoperability |
498 | Figure 4-5 Pull-Up/Pull-Down CC Model Figure 4-6 Current Source/Pull-Down CC Model |
499 | Table 4-10 Source Perspective |
500 | Table 4-11 Source (Host) and Sink (Device) Behaviors by State |
501 | Figure 4-7 Source Functional Model for CC1 and CC2 |
502 | Figure 4-8 Source Functional Model Supporting USB PD PR_Swap |
503 | Figure 4-9 Sink Functional Model for CC1 and CC2 |
504 | Figure 4-10 Sink Functional Model Supporting USB PD PR_Swap and Vconn_Swap |
505 | Figure 4-11 DRP Functional Model for CC1 and CC2 |
507 | Table 4-12 USB PD Swapping Port Behavior Summary |
508 | Table 4-13 Power Role Behavioral Model Summary |
509 | 4.5.2 CC Functional and Behavioral Requirements |
510 | Figure 4-12 Connection State Diagram: Source |
511 | Figure 4-13 Connection State Diagram: Sink |
512 | Figure 4-14 Connection State Diagram: Sink with Accessory Support |
513 | Figure 4-15 Connection State Diagram: DRP |
514 | Figure 4-16 Connection State Diagram: DRP with Accessory and Try.SRC Support |
515 | Figure 4-17 Connection State Diagram: DRP with Accessory and Try.SNK Support |
516 | Table 4-14 Source Port CC Pin State Table 4-15 Sink Port CC Pin State |
531 | Figure 4-18 Sink Power Sub-States |
533 | Figure 4-19 Passive Cable eMarker State Diagram Figure 4-20 Active Cable eMarker State Diagram |
536 | Table 4-16 Mandatory and Optional States |
538 | 4.5.3 USB Port Interoperability Behavior Figure 4-21 Source to Sink Functional Model |
539 | Figure 4-22 Source to DRP Functional Model |
541 | Figure 4-23 DRP to Sink Functional Model |
542 | Figure 4-24 DRP to DRP Functional Model – CASE 1 |
543 | Figure 4-25 DRP to DRP Functional Model – CASE 2 & 3 |
546 | Figure 4-26 Source to Source Functional Model Figure 4-27 Sink to Sink Functional Model |
547 | Figure 4-28 DRP to VPD Model |
548 | Figure 4-29 Source to Legacy Device Port Functional Model |
549 | Figure 4-30 Legacy Host Port to Sink Functional Model |
550 | Figure 4-31 DRP to Legacy Device Port Functional Model |
551 | 4.6 Power Figure 4-32 Legacy Host Port to DRP Functional Model |
552 | 4.6.1 Power Requirements during USB Suspend Table 4-17 Precedence of power source usage |
553 | 4.6.2 Vbus Power Provided Over a USB Type-C Cable |
554 | Figure 4-33 Sink Monitoring for Current in Pull-Up/Pull-Down CC Model Table 4-18 USB Type-C Current Advertisement and PDP Labeling |
555 | Figure 4-34 Sink Monitoring for Current in Current Source/Pull-Down CC Model |
556 | Figure 4-35 USB PD over CC Pins Figure 4-36 USB PD BMC Signaling over CC |
557 | 4.7 USB Hubs 4.8 Power Sourcing and Charging |
558 | 4.8.1 DFP as a Power Source |
559 | Figure 4-37 USB Type-C Cable’s Output as a Function of Loadfor Non-PD-based USB Type-C Charging |
560 | Figure 4-38 0 – 3 A USB PD-based Charger USB Type-C Cable’s Outputas a Function of Load Figure 4-39 3 – 5 A USB PD-based Charger USB Type-C Cable’s Outputas a Function of Load |
561 | 4.8.2 Non-USB Charging Methods 4.8.3 Sinking Host 4.8.4 Sourcing Device 4.8.5 Charging a System with a Dead Battery 4.8.6 USB Type-C Multi-Port Chargers |
564 | 4.9 Electronically Marked Cables Figure 4-40 Electronically Marked Cable with Vconn connected through the cable |
565 | 4.9.1 Parameter Values 4.9.2 Active Cables 4.10 Vconn-Powered Accessories (VPAs) and Vconn-Powered USB Devices (VPDs) Figure 4-41 Electronically Marked Cable with SOP’ at both ends Table 4-19 SOP’ and SOP” Timing |
566 | 4.10.1 Vconn-Powered Accessories (VPAs) 4.10.2 Vconn-Powered USB Devices (VPDs) 4.11 Parameter Values 4.11.1 Termination Parameters |
567 | Table 4-20 Source CC Termination (Rp) Requirements Table 4-21 Sink CC Termination (Rd) Requirements Table 4-22 Powered Cable Termination Requirements |
568 | Table 4-23 Sink CC Termination Requirements Table 4-24 SBU Termination Requirements |
569 | 4.11.2 Timing Parameters Table 4-25 Vbus and Vconn Timing Parameters |
570 | Figure 4-42 DRP Timing Table 4-26 DRP Timing Parameters |
571 | Table 4-27 CC Timing |
572 | 4.11.3 Voltage Parameters Table 4-28 CC Voltages on Source Side – Default USB Table 4-29 CC Voltages on Source Side – 1.5 A @ 5 V Table 4-30 CC Voltages on Source Side – 3.0 A @ 5 V Table 4-31 Voltage on Sink CC Pins (Default USB Type-C Current only) |
573 | 5 Functional Extensions 5.1 Alternate Modes 5.1.1 Alternate Mode Architecture Table 4-32 Voltage on Sink CC pins (Multiple Source Current Advertisements) |
574 | 5.1.2 Alternate Mode Requirements |
575 | Figure 5-1 Pins Available for Reconfiguration over the Full-Featured Cable Figure 5-2 Pins Available for Reconfiguration for Direct Connect Applications |
576 | Figure 5-3 Alternate Mode Implementation using a USB Type-C to USB Type-C Cable |
577 | Figure 5-4 Alternate Mode Implementation using a USB Type-Cto Alternate Mode Cable or Device |
578 | 5.1.3 Parameter Values Table 5-1 USB Safe State Electrical Requirements Table 5-2 USB Billboard Device Class Availability Following Alternate Mode Entry Failure Table 5-3 Alternate Mode Signal Noise Ingression Requirements |
579 | 5.1.4 Example Alternate Mode – USB DisplayPort™ Dock Figure 5-5 USB DisplayPort Dock Example |
581 | 5.2 Managed Active Cables 5.2.1 Requirements for Managed Active Cables that respond to SOP’ and SOP” |
582 | 5.2.2 Cable Message Structure 5.2.3 Modal Cable Management Figure 5-6 Managed Active Cable |
584 | A Audio Adapter Accessory Mode A.1. Overview A.2. Detail |
585 | Table A1 USB Type-C Analog Audio Pin Assignments |
586 | A.3. Electrical Requirements Table A2 USB Type-C Analog Audio Pin Electrical Parameter Ratings |
587 | A.4. Example Implementations A.4.1. Passive 3.5 mm to USB Type-C Adapter – Single Pole Detection Switch A.4.2. 3.5 mm to USB Type-C Adapter Supporting 500 mA Charge-Through Figure A1 Example Passive 3.5 mm to USB Type-C Adapter |
589 | B Debug Accessory Mode B.1. Overview B.2. Functional Figure A2 Example 3.5 mm to USB Type-C Adapter Supporting 500 mA Charge-Through |
590 | Figure B1 USB Type-C Debug Accessory Layered Behavior |
591 | B.2.1. Signal Summary B.2.2. Port Interoperability B.2.3. Debug Accessory Mode Entry Figure B2 DTS Plug Interface Table B1 DTS to TS Port Interoperability |
592 | B.2.4. Connection State Diagrams |
593 | Figure B3 Connection State Diagram: DTS Source |
594 | Figure B4 Connection State Diagram: DTS Sink |
595 | Figure B5 Connection State Diagram: DTS DRP |
600 | Figure B6 TS Sink Power Sub-States Table B2 Rp/Rp Charging Current Values for a DTS Source |
602 | B.2.5. DTS Port Interoperability Behavior Table B3 Mandatory and Optional States |
613 | B.2.6. Orientation Detection B.3. Security/Privacy Requirements: |
614 | C USB Type-C Digital Audio C.1. Overview C.2. USB Type-C Digital Audio Specifications |