Ads
related to: usb power hub
Search results
Results From The WOW.Com Content Network
A four-port "compact design" USB hub: upstream and downstream ports shown. A USB hub is a device that expands a single Universal Serial Bus (USB) port into several so that there are more ports available to connect devices to a host system, similar to a power strip. All devices connected through a USB hub share the bandwidth available to that hub.
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.
Overview. [edit] USB was designed to standardize the connection of peripheralsto personal computers, both to exchange data and to supply electric power. It has largely replaced interfaces such as serial portsand parallel portsand has become commonplace on a wide range of devices.
USB 3.0 port provided by an ExpressCard-to-USB 3.0 adapter may be connected to a separately-powered USB 3.0 hub, with external devices connected to that USB 3.0 hub. On the motherboards of desktop PCs which have PCI Express (PCIe) slots (or the older PCI standard), USB 3.0 support can be added as a PCI Express expansion card .
A powered USB hub may sidestep the issue, if supported, since it will then provide its own power according to either the USB 2.0 or USB 3.0 specifications. Some incompatibilities in both HNP and SRP were introduced between the 1.3 and 2.0 versions of the OTG supplement, which can lead to interoperability issues when using those protocol versions.
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. It is mostly used in point-of-sale equipment, such as ...