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2. USB 3.0 - Wikipedia

   en.wikipedia.org/wiki/USB_3.0

   In USB 3.0, dual-bus architecture is used to allow both USB 2.0 (Full Speed, Low Speed, or High Speed) and USB 3.0 (SuperSpeed) operations to take place simultaneously, thus providing backward compatibility. The structural topology is the same, consisting of a tiered star topology with a root hub at level 0 and hubs at lower levels to provide ...

3. USB hardware - Wikipedia

   en.wikipedia.org/wiki/USB_hardware

   USB 3.0 introduced Type-A SuperSpeed plugs and receptacles as well as micro-sized Type-B SuperSpeed plugs and receptacles. The 3.0 receptacles are backward-compatible with the corresponding pre-3.0 plugs. USB 3.x and USB 1.x Type-A plugs and receptacles are designed to interoperate. To achieve USB 3.0's SuperSpeed (and SuperSpeed+ for USB 3.1 ...

4. USB - Wikipedia

   en.wikipedia.org/wiki/USB

   USB 3.0 and later specifications define one dedicated pair for USB 2.0 compatibility and two or four pairs for data transfer: two data wire pairs realising full-duplex (FDx) for single lane (×1) variants require at least SuperSpeed (SS) connectors; four pairs realising full-duplex for two lane (×2) variants require USB-C connectors.

5. USB communications - Wikipedia

   en.wikipedia.org/wiki/USB_communications

   The written USB 3.0 specification was released by Intel and its partners in August 2008. The first USB 3.0 controller chips were sampled by NEC in May 2009, [4] and the first products using the USB 3.0 specification arrived in January 2010. [5] USB 3.0 connectors are generally backward compatible, but include new wiring and full-duplex operation.

6. eSATAp - Wikipedia

   en.wikipedia.org/wiki/ESATAp

   The USB port is fully compatible with USB 5 Gbit/s (USB 3.0), USB 480 Mbit/s (USB 2.0) and USB 12 Mbit/s (1.1); USB 3.0 devices are compatible, but will operate at USB 2.0 speed if internal USB 3.0 connector is not connected.

7. Extensible Host Controller Interface - Wikipedia

   en.wikipedia.org/wiki/Extensible_Host_Controller...

   The xHCI reduces the need for periodic device polling by allowing a USB 3.0 or later device to notify the host controller when it has data available to read, and moves the management of polling USB 2.0 and 1.1 devices that use interrupt transactions from the CPU-driven USB driver to the USB host controller.

8. USB4 - Wikipedia

   en.wikipedia.org/wiki/USB4

   The compatibility typically only breaks between the different families of standards (USB 2.0, USB 3.2, USB4). The USB4 standard mandates that classic active or hybrid active cables still have vast backward compatibility support, so as to behave as if they were regular, passive cables in the eyes of the consumer. [ 37 ]

9. USB hub - Wikipedia

   en.wikipedia.org/wiki/USB_hub

   USB 3.0 is the third major version of the Universal Serial Bus (USB) standard for interfacing computers and electronic devices. Among other improvements, USB 3.0 adds the new transfer rate referred to as SuperSpeed USB (SS) that can transfer data at up to 5 Gbit/s (625 MB/s), which is about 10 times faster than the USB 2.0 standard.