Introduction to USB technology

What is USB?

Universal Serial Bus “USB” 3.0 is the latest specifications of USB standards placed by Intel. It was released in August 2008, by a group of developers led by Intel. This technology supports data transfer with a very high speed – from 625 megabytes per second to 5 gigabits per second, which is actually ten times faster than USB 2.0. When USB technology was first introduced, it was considered one of the best things that had ever happened in the field of personal computing, and PC users welcomed them with all my heart. Over the years, USB technology continues to grow, and has become increasingly effective and also popular. Many variants of interfacing plugs have been designed and developed by manufacturers to support technology, and to connect various peripheral devices with a PC system. Originally developed for use by modems and routers, USB now supports hoarding external devices, which can be attached to PCs, especially for data transfer purposes. However, the majority of devices communicate with pcs through USBS including keyboards, mice, printers, etc. Basically, USB helps interface or “join” external or peripheral devices with a PC.

Devices use USB technology

A device that helps us interact with a PC is called a human interface device. USB can help this device to connect with a PC through a special socket specifically designed to support their interface. Human interface devices such as mice and keyboards require very low bandwidth for communication purposes, and very efficiently supported by even USB 1.0. However, external peripheral devices such as printers, fax machines, scanners, hard drives, and backup devices need a higher USB technology version. Devices such as cellphones, digital cameras, game advice, and personal digital assistants (PDAs) also communicate via USB.

USB version and speed transfer speed

USB technology has evolved over the years, and with every new version, consistently increasing data transfer speeds:

• USB 1.0 supports low speed up to 1.5 Mbps
• USB 1.1 supports full speed up to 12 Mbps
• USB 2.0 supports high speeds of up to 480 Mbps
• UBS 3.0 supports super speed of up to 5 Gbps

Compatibility of USB 3.0 with version 2.0

USB 3.0 reaches a very high transfer rate by entering four additional cables in the data cable – a total of six cables. It supports full-duplex communication protocols (capacity to send and receive data simultaneously during the same media), and utilize the electrical power that can be ignored. It supports backward compatibility with USB 2.0 devices. However, to achieve full USB 3.0 benefits is required to use devices that are compatible with the latest USB versions, and especially cables.

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