enow.com Web Search

Search results

1. Results from the WOW.Com Content Network

2. USB hub - Wikipedia

   en.wikipedia.org/wiki/USB_hub

   Power equals voltage times current. A USB port that draws 500 mA (0.5 A) at 5 volts is drawing 2.5 watts of power. In Bus-powered USB hubs, each USB port can supply power as well as transfer data. A self-powered hub takes its power from an external power supply unit and can therefore provide full power (up to 500 mA) to every port. Self-powered ...

3. USB hardware - Wikipedia

   en.wikipedia.org/wiki/USB_hardware

   Optionally, the hub controller may draw power for its operation as a low-power device, but all high-power ports must draw from the hub's self-power. Where devices (for example, high-speed disk drives) require more power than a high-power device can draw, [48] they function erratically, if at all, from bus power of a single port. USB provides ...

4. PoweredUSB - Wikipedia

   en.wikipedia.org/wiki/PoweredUSB

   12 V and 24 V powered USB sockets, on an NCR cash register. PoweredUSB, also known as Retail USB, USB PlusPower, USB +Power, and USB Power Plus, [1] is an addition to the Universal Serial Bus standard that allows for higher-power devices to obtain power through their USB host instead of requiring an independent power supply or external AC adapter.

5. 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 ...

6. USB communications - Wikipedia

   en.wikipedia.org/wiki/USB_communications

   Full speed (FS) rate of 12 Mbit/s is the basic USB signaling rate defined by USB 1.0. 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 ...

7. Stay Powered Up on the Road with These Editor-Approved USB ...

   www.aol.com/stay-powered-road-8-best-155900731.html

   30-Watt USB Car Charger. This simple 12-volt plug-in from Ailkin comes with a low price tag, one USB-A port, and one USB-C. It also has a 30-watt capacity, which can charge a phone nearly as ...