第4章 ure，M C A )：这种总线结构用于老式的I B M计算机上，具有3 2位通信的能力。 " 外围计算机接口(Peripheral Computer Interface，P C I )：这是一种很现代的总线设计，支持3 2位和6 4位的通信。P C I使用本地总线设计，允许网络接口和
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Computer Peripheral Interface 计算机外围设备接口
USB is a new PC interconnection protocol and has many advantages, It is a tendency that USB replaces the RS232 as computer and peripheral standard interface.
USB作为一种新的PC机互连协议，因其诸多优点，有逐渐取代RS 232串口，成为计算机和外设标准接口之趋势。
USB, namely Universal Serial Bus, is a novel interface connecting computer and peripheral equipments and is a great innovation in the connecting techniques of the peripheral equipments of computers.
通用串行总线是外围设备与计算机进行连接的新型接口，是计算机外设连接技术的重大变革。
As an important innovation of peripheral interface technology, USB introduces the network topology concept into traditional computer structure.
作为计算机外设接口技术的重要变革，USB在传统的计算机组织结构的基础上，引入网络的拓扑结构思想。
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