IEC 62680-4-1:20 22提供通用串行总线4？规格。 USB 3.1和USB 3.2是增加带宽的进化步骤。USB4的目标保持不变，增加了帮助融合USB Type-C的目标？连接器生态系统，并最大限度地减少最终用户的困惑。下面列出了实现这一目标的几个关键设计领域: ？通过单个USB Type-C连接器提供显示、数据和加载/存储功能。 ？保留与USB和Thunderbolt现有生态系统的兼容性？产品。 ？定义端口功能，以获得可预测和一致的用户体验。 ？提供更高的主机灵活性，以配置带宽、电源管理和其他性能相关参数以满足系统需求 此文档包含USB4？规范，1.0版，带勘误表和ECN，截止日期为2021年5月19日。

IEC 62680-4-1:2022 provides Universal Serial Bus 4？ Specification.
USB 3.1 and USB 3.2 were evolutionary steps to increase bandwidth. The goal for USB4 remains the same with the added goal of helping to converge the USB Type-C？ connector ecosystem and minimize end-user confusion. Several key design areas to meet this goal are listed below:
？ Offer display, data, and load/store functionality over a single USB Type-C connector.
？ Retain compatibility with existing ecosystem of USB and Thunderbolt？ products.
？ Define Port Capabilities for predictable and consistent user experience.
？ Provide increased host flexibility to configure bandwidth, power management, and other performance-related parameters for system needs
This document contains USB4？ Specification, Version 1.0 with Errata and ECN through May 19, 2021.