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  1. USB - Wikipedia

  2. 【解説】USB(2.0/3.0/3.1/3.2)の規格と速度、コネクタの違い ...

  3. 他の人はこちらも質問
    The USB 3.0 standard adds four more wires for data transmission. While USB 2.0 can only send data in one direction at a time (downstream or upstream), USB 3.0 can transmit data in both directions simultaneously. On the power wires, the computer can supply up to 500 milliamps of power at 5 volts.
    A USB 3.0 cable is compatible with USB 2.0 ports — you won't get the same data transfer speed as with a USB 3.0 port, but data and power will still transfer through the cable. Many USB devices can be put to sleep by the host computer when the computer enters a power-saving mode.
    USB-C Type 2.1 is a USB-C cable and connector specification which allows for high power transfer and faster data speeds. The connector shape is the same as other USB-C connectors. Newly added labels indicate whether a specific cable supports Standard Power Range (SPR) or both SPR and Extended Power Range (EPR).
    In addition to improving functionality and encouraging innovation, USB 2.0 increases the productivity of user applications and allows the user to run multiple PC applications at once or several high-performance peripherals simultaneously. The USB 3.0 standard became official on Nov. 17, 2008 [source: Everything USB ].
  4. xHCI Interoperability Test Procedures For Peripherals, Hubs ...

  5. New USB-C Type 2.1 Cable and Connector Specification

  6. Understanding USB Types and the Flexible USB System - Yahoo

  7. USB Explained: All the Different Types (and What They're ...

  8. USB Direct Cable Connection, USB Versions, Specifications ...

  9. How to Choose the Right Flash Drive - Lifewire

  10. GitHub - JimHeaney/i2c-usb-hub: An i2C Controllable USB 2. ...

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