LYCOS RETRIEVER 
Universal Serial Bus
built 658 days ago
USB was originally seen as a complement to FireWire (IEEE 1394), which was designed as a high-speed serial bus which could efficiently interconnect peripherals such as hard disks, audio interfaces, and video equipment. USB originally operated at a far lower data rate and used much simpler hardware, and was suitable for small peripherals such as keyboards and mice.
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In addition, if an OEM platform contains a UHCI-compliant Host Controller, then the OEM could write their own Universal Host Controller Driver (UHCD) to support UHCI controllers as long as it exposes the appropriate HCD interface to the USBD module. The OHCD sample is an appropriate model to use as a reference while developing a UHCD.
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Some PC camera IC solutions available on the market today offer minor compression on the chip, which allows the raw imaging data that a sensor captures to be compressed enough to travel over a Universal Serial Bus. In such a design, the rest of the image-processing functions, such as color correction, white balance and full image compression, are carried out on a PC.
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The IEEE's Microcomputer Standards Committee commenced in 1986 a unification process for various serial bus implementations of the VME, Multibus II, and Future Bus standards. This effort resulted in the original development of what became the IEEE 1394-1995 standard in Fall 1995. Tags: IEEE 1394, Adaptec Inc., IEEE, FireWire, Desktops, Quality, Consumer Electronics, Personal Technology, Hardware, Business Operations White papers
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Active extension cables are bus-powered hubs equipped with two maximum length standard USB cables. USB connections can be extended to 50 m over CAT5 or up to 10 km over fiber by using special USB extender products developed by various manufacturers.
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The serial RS-232 port and parallel port dominated the "wired" communications world for a number of years before USB was widely applied to the PC and PC peripheral. Today, USB has proliferated to the point that it is not easy to find a product with a serial port or parallel port on the market. More importantly, USB is continuing its success. In fact, it has been growing at a very fast rate – one that no one could have imagined ten years ago.
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Universal Serial Bus