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2. USB - Wikipedia

   en.wikipedia.org/wiki/USB

   High-speed USB 2.0 hubs contain devices called transaction translators that convert between high-speed USB 2.0 buses and full and low speed buses. There may be one translator per hub or per port. Because there are two separate controllers in each USB 3.0 host, USB 3.0 devices transmit and receive at USB 3.0 signaling rates regardless of USB 2.0 ...

3. USB communications - Wikipedia

   en.wikipedia.org/wiki/USB_communications

   All USB hubs can operate at this rate. High speed (HS) rate of 480 Mbit/s was introduced in 2001 by USB 2.0. High-speed devices must also be capable of falling-back to full-speed as well, making high-speed devices backward compatible with USB 1.1 hosts. Connectors are identical for USB 2.0 and USB 1.x.

4. 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 ...

5. What is USB-C, the charging socket that replaced Apple's ...

   www.aol.com/news/usb-c-charging-socket-replaced...

   USB-C cables can carry more power so laptops can be charged faster, and they enable faster data transfer speeds, allowing a big trove of files to be copied from a computer to an external hard drive.

6. USB hardware - Wikipedia

   en.wikipedia.org/wiki/USB_hardware

   Since these currents are larger than in the original standard, the extra voltage drop in the cable reduces noise margins, causing problems with High Speed signaling. Battery Charging Specification 1.1 specifies that charging devices must dynamically limit bus power current draw during High Speed signaling; [52] 1.2 specifies that charging ...

7. USB4 - Wikipedia

   en.wikipedia.org/wiki/USB4

   HBR3 was the highest available DP speed at this time. Active cables may have additional complications, because the active electronics do not need to operate all high speed wire-pairs in the same direction for normal USB operations (but "80 Gbps" cables are mandated to support asymmetric connections, which includes at least some of the wire ...