A Brief Intoduction To Usb Architecture
Submitted by freefortermpapers on 06/24/2008 03:00 PM
- Category: Technology
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A Brief Intoduction To Usb Architecture
A brief introduction to USB architecture
USB (Universal Serial Bus) is a peripheral bus standard developed by PC and telecom industry leaders such as Compaq, DEC, IBM, Intel, Microsoft, NEC and Northern Telecom for the purpose of bringing the plug and play of computer peripherals outside the box, eliminating the need install cards into dedicated computer slots and reconfigure the system. Personal computers equipped with USB will allow computer peripherals to be automatically configured as soon as they are physically attached without the need to reboot or run setup. USB will also allow multiple devices up to 127 to run simultaneously on a computer, with peripherals such as
· Printers
· Scanners
· Mice
· Joysticks
· Flight yokes
· Digital cameras
· Web cams
· Modems
· Speakers
· Telephones
· Video phones
plus monitors and keyboards acting as additional plug in sites, or hubs. The technology is appropriately named. "Universal," conveys the notion of being for all things. While the port does have speed limitations, the "one plug fits all" design is clearly there. "Serial" describes the flow of information in the bus. The flow is more like an advanced data network protocol than the traditional PC serial bus data flow. The traditional serial bus has IRQ (Internet Request), DMA and device limits that dictate its use; USB departs from all of that. It is a "Bus" architecture in that it provides a way to funnel information from many devices into and out of a computer system in an orderly manner. The basic purpose behind USB is to eliminate all of the troubles of installing peripheral devices. With USB, there is no need to open the computer case and install cumbersome expansion cards for various devices. USB is built to interact with Microsoft's Plug and Play (PnP) specification, meaning that users can install and "hot-swap" devices...
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