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Computer Busses by William Buchanan

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9

USB and Firewire

9.1 Introduction

The PC is now evolving into a powerful system through:

 Microprocessor developments.

 Improved graphics systems, such as AGP.

 The PCI bus architecture, especially the PCI bridge.

 Improved plug-and-play technology and automated set-up. The USB port aids in its ease of connection.

USB (Universal Serial Bus) allows for the connection of medium bandwidth peripherals such as keyboards, mice, tablets, modems, telephones, CD-ROM drives, printers and other low to moderate speed external peripherals in a tiered-star topology. Its basic specification is:

 Isochronous (‘continuous’) transfers which supports audio and video. With isochronous data transfers, devices transmit and receive data in a guaranteed and predictable ...

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