最終更新:2026-08-31 (月) 08:52:31 (13d)  

USB 2.0/仕様/Chapter 11
Top / USB 2.0 / 仕様 / Chapter 11

CHAPTER 11 HUB SPECIFICATION

  • 11.1 Overview
    • 11.1.1 Hub Architecture
    • 11.1.2 Hub Connectivity
  • 11.2 Hub Frame/Microframe Timer
    • 11.2.1 High-speed Microframe Timer Range
    • 11.2.2 Full-speed Frame Timer Range
    • 11.2.3 Frame/Microframe Timer Synchronization
    • 11.2.4 Microframe Jitter Related to Frame Jitter
    • 11.2.5 EOF1 and EOF2 Timing Points
  • 11.3 Host Behavior at End-of-Frame
    • 11.3.1 Full-/low-speed Latest Host Packet
    • 11.3.2 Full-/low-speed Packet Nullification
    • 11.3.3 Full-/low-speed Transaction Completion Prediction
  • 11.4 Internal Port
    • 11.4.1 Inactive
    • 11.4.2 Suspend Delay
    • 11.4.3 Full Suspend (Fsus)
    • 11.4.4 Generate Resume (GResume)
  • 11.5 Downstream Facing Ports
    • 11.5.1 Downstream Facing Port State Descriptions
    • 11.5.2 Disconnect Detect Timer
    • 11.5.3 Port Indicator
  • 11.6 Upstream Facing Port
    • 11.6.1 Full-speed
    • 11.6.2 High-speed
    • 11.6.3 Receiver
    • 11.6.4 Transmitter
  • 11.7 Hub Repeater
    • 11.7.1 High-speed Packet Connectivity
    • 11.7.2 Hub Repeater State Machine
    • 11.7.3 Wait for Start of Packet from Upstream Port (WFSOPFU)
    • 11.7.4 Wait for End of Packet from Upstream Port (WFEOPFU)
    • 11.7.5 Wait for Start of Packet (WFSOP)
    • 11.7.6 Wait for End of Packet (WFEOP)
  • 11.8 Bus State Evaluation
    • 11.8.1 Port Error
    • 11.8.2 Speed Detection
    • 11.8.3 Collision
    • 11.8.4 Low-speed Port Behavior
  • 11.9 Suspend and Resume
  • 11.10 Hub Reset Behavior
  • 11.11 Hub Port Power Control
    • 11.11.1 Multiple Gangs
  • 11.12 Hub Controller
    • 11.12.1 Endpoint Organization
    • 11.12.2 Hub Information Architecture and Operation
    • 11.12.3 Port Change Information Processing
    • 11.12.4 Hub and Port Status Change Bitmap
    • 11.12.5 Over-current Reporting and Recovery
    • 11.12.6 Enumeration Handling
  • 11.13 Hub Configuration
  • 11.14 Transaction Translator
    • 11.14.1 Overview
    • 11.14.2 Transaction Translator Scheduling
  • 11.15 Split Transaction Notation Information
  • 11.16 Common Split Transaction State Machines
    • 11.16.1 Host Controller State Machine
    • 11.16.2 Transaction Translator State Machine
  • 11.17 Bulk/Control Transaction Translation Overview
    • 11.17.1 Bulk/Control Split Transaction Sequences
    • 11.17.2 Bulk/Control Split Transaction State Machines
    • 11.17.3 Bulk/Control Sequencing
    • 11.17.4 Bulk/Control Buffering Requirements
    • 11.17.5 Other Bulk/Control Details
  • 11.18 Periodic Split Transaction Pipelining and Buffer Management
    • 11.18.1 Best Case Full-Speed Budget
    • 11.18.2 TT Microframe Pipeline
    • 11.18.3 Generation of Full-speed Frames
    • 11.18.4 Host Split Transaction Scheduling Requirements
    • 11.18.5 TT Response Generation
    • 11.18.6 TT Periodic Transaction Handling Requirements
    • 11.18.7 TT Transaction Tracking
    • 11.18.8 TT Complete-split Transaction State Searching
  • 11.19 Approximate TT Buffer Space Required
  • 11.20 Interrupt Transaction Translation Overview
    • 11.20.1 Interrupt Split Transaction Sequences
    • 11.20.2 Interrupt Split Transaction State Machines
    • 11.20.3 Interrupt OUT Sequencing
    • 11.20.4 Interrupt IN Sequencing
  • 11.21 Isochronous Transaction Translation Overview
    • 11.21.1 Isochronous Split Transaction Sequences
    • 11.21.2 Isochronous Split Transaction State Machines
    • 11.21.3 Isochronous OUT Sequencing
    • 11.21.4 Isochronous IN Sequencing
  • 11.22 TT Error Handling
    • 11.22.1 Loss of TT Synchronization With HS SOFs
    • 11.22.2 TT Frame and Microframe Timer Synchronization Requirements
  • 11.23 Descriptors
    • 11.23.1 Standard Descriptors for Hub Class
    • 11.23.2 Class-specific Descriptors
  • 11.24 Requests
    • 11.24.1 Standard Requests
    • 11.24.2 Class-specific Requests



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