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Wednesday, July 27, 2011

what is the difference between USB 1.1, USB 2.0 and USB 3.0?

USB stands for ‘Universal Serial Bus’ which enabling simple plug and play connectivity for a wide variety of devices to enhance the computing experience. This is a device invented by Ajay Bhatt. Its invention has replaced almost everything that was earlier used for this purpose. Although invented by for computers, USB has become so popular that it is used on virtually all electronic devices that are manufactured today. All game consoles, smartphones and PDA’s videos benefit from a USB power cord today. Even the Bluetooth devices and GPS chargers enjoy USB today. The huge popularity of USB can be found by its global sales of over 2 billion units in 2008. A striking feature of USB is that many of the same charge devices being connected with a computer.
or now there have been three versions of USB. USB 1.0 was released in 1996, USB 2.0 was born in 2000. It was in 2008 as USB 3.0 was introduced.

USB 1.1

USB 1.1 provides support for two interface speeds: Low Speed at 1.5Mb/s and Full Speed at 12Mb/s.
The two interface speeds target specific classes of devices to provide the most efficient and cost-effective interconnect solution.
Low speed devices are typically interactive input devices such as keyboards, mice or game controllers.
Full speed devices are typically application specific input devices such as microphones, cameras and printers

USB 2.0

USB 2.0 had a maximum speed of 480Mb/s.
Backwards compatible with the full speed and low speed transfer rates of USB 1.1.

USB 3.0

USB 3.0 boasts a maximum transfer speed of 4.8 Gbps yes, 4.8 Giga bits per second, almost 10 times faster than USB 2.0. Even with realistic numbers you can transfer data between your computer to a 64 Gigabyte thumb drive to full capacity in under 20 minutes!

aster speed is not the only difference, power usage and requirements for USB 3 devices are much "greener". The USB 3 devices will provide more power when needed to the device to achieve a maximum throughput and conserve power when the device is connected but is idling. so USB 3.0 require higher amounts of power to operate. It can provide 50% more power than USB 2.0 does through the cable itself.

Modern operating systems such as Windows 7 already has support built in for USB 3.0 and Mother Board manufacturers already have the USB 3 port built in on the upcoming motherboards. The USB 3 port on a motherboard is characterised by a blue color But USB is Black or white in color

USB 3.0 support Bi-directional data transfer

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