USB 3.0 技术规范文档。

简介：
Recognition of USB 3.0 Technical Contribution1 Introduction1.1 Motivation.................................................................................................................1-11.2 Objective of the Specification...................................................................................1-21.3 Scope of the Document............................................................................................1-21.4 USB Product Compliance.........................................................................................1-21.5 Document Organization............................................................................................1-31.6 Design Goals............................................................................................................1-31.7 Related Documents..................................................................................................1-32 Terms and Abbreviations3 SuperSpeed USB Architectural Overview3.1 USB 3.0 Overview – A comprehensive examination of the USB 3.0 standard is presented here, detailing its core functionalities and design principles.3.1.1 SuperSpeed Architecture Overview – This section provides an in-depth look at the fundamental architecture underpinning the SuperSpeed technology, outlining its layered structure and key components involved in data transmission.3.1.1.1 Physical Layer – The physical layer’s characteristics are described, encompassing the electrical signaling and transmission methods utilized within the USB 3.0 system to facilitate data transfer at high speeds..3.1.1.2 Link Layer – A detailed explanation of the link layer’s role is provided, covering aspects such as framing, flow control, and error detection mechanisms essential for reliable communication..3.1.1.3 Protocol Layer – The protocol layer’s functions are elaborated upon, including the specific protocols employed to manage data packets and ensure efficient data exchange..3.1.1.4 Hubs – The operation and functionality of USB hubs are explored, highlighting their contribution to expanding the connectivity options within a USB system..3.1.1.5 Power Management – The power management features integrated into USB 3.0 are examined, focusing on strategies for optimizing energy consumption and device operation..3.2 USB 3.0 System – This section delves into the overall system architecture associated with USB 3.0 technology, providing a holistic view of its implementation..3.2.1 Comparing SuperSpeed USB to USB 2.0 – A comparative analysis is conducted between SuperSpeed USB and its predecessor, highlighting key performance differences and advancements in speed and efficiency..3.2.2 System Level Topology – The structural arrangement of components within a typical USB 3 system is illustrated, clarifying how hosts, hubs, and devices interact to form a functional network.. Specifically detailing how hosts connect to hubs which then connect to various devices forming a complete communication pathway . Host connections are described along with hub configurations . Device connectivity is also outlined for clarity . The bus protocol governing this interaction is further examined . Robustness considerations including error detection mechanisms and handling procedures are also addressed . This ensures data integrity during transmission . Furthermore , this chapter provides an overview of each chapter within the broader specification document . It details mechanical specifications , physical layer parameters , link layer protocols , protocol layer functionality , framework layer operations , hub architecture including repeater/forwarder designs , as well as performance metrics related to speed and power efficiency demonstrating optimal operation under diverse conditions