IEC 62680-3-1:2017

Overview

IEC 62680-3-1:2017 - Universal Serial Bus 3.1 Specification - is the IEC-adopted industry standard that defines the USB 3.1 generation. Prepared from the USB Implementers Forum (USB‑IF) specification, this document defines the protocol, transaction types, bus management and the programming interfaces required to design and implement USB 3.1-compliant hosts, hubs and devices. USB 3.1 (also called Enhanced SuperSpeed) builds on USB 3.0 (SuperSpeed) to deliver significantly higher data rates for modern peripherals.

Key Topics

• Protocol definition: bus-layer behavior and data framing required for USB 3.1 operation.
• Transaction types: the classes of data transfer and control transactions used between hosts and devices.
• Bus management: link management, error handling and power/bandwidth negotiation for stable operation.
• Programming interface: software-facing APIs and descriptors used by device and host firmware/drivers.
• Enhanced SuperSpeed concept: a set of features applying to both USB 3.0 and USB 3.1 bus operation.
• SuperSpeed vs SuperSpeedPlus (SSP): terminology used in the standard - SuperSpeed refers to 5 Gbps operation (USB 3.0), SuperSpeedPlus (SSP) refers to 10 Gbps operation (USB 3.1).
• Performance focus: guidance aimed at delivering more than double the bandwidth of USB 3.0 - relevant to high-throughput devices such as SSDs and high‑definition displays.
• Standards provenance & IP: the text is provided by the USB‑IF and published by IEC; implementers should review the specification’s intellectual property and licensing notices (USB specifications are provided “AS IS” and may have licensing implications).

Applications

IEC 62680-3-1:2017 is applied where high-bandwidth, low-latency USB connectivity is required:

• High-performance storage (NVMe/SSD adapters, external drives)
• Video and display interfaces (USB‑based docking stations, UHD displays)
• High-speed peripherals (network adapters, AV capture devices)
• Host controller and device controller silicon design and validation
• Firmware, driver and OS development for USB 3.1 support
• Compliance testing and product certification labs

Who should use this standard

• Hardware engineers and silicon vendors designing USB 3.1 PHY, controllers and connectors
• Firmware and driver developers implementing the programming interface and transaction handling
• System integrators and device manufacturers seeking reliable high-speed USB operation
• Test laboratories and compliance teams validating interoperability, performance and bus management

Related standards

• IEC 62680 family (other Parts covering connectors, power delivery and legacy USB versions)
• USB-IF published USB specifications and device class documents (for implementation details and test cases)

Keywords: IEC 62680-3-1:2017, USB 3.1, Universal Serial Bus, SuperSpeedPlus, Enhanced SuperSpeed, 10 Gbps, 5 Gbps, bus management, programming interface, SSD, high-definition display.