数据通信总线技术的现状与未来发展趋势

Status Quo and Development Perspectives of Bus Technology in Data Communications

文章结合中兴通讯ZXR10数据产品中通信总线实际应用情况,阐述了各种数据通信总线的工作时钟频率范围、带宽范围以及它们各自的优势和缺陷。文章认为并行总线由于自身缺陷,已经不适合进行高速传输,高速串行点对点连接将代替传统的并行接口;数据交换也不再是简单地通过驱动电路和并行数据线进行,而是通过特殊的串行高速总线连接;传统的在一条总线上同时挂载多个设备的模式正逐渐消亡,总线功能已被一个集中式的交换模块取代,而交换模块和各个设备都是通过高速串行点对点的方式进行连接。

The paper introduces the work clock frequency, bandwidth, advantages and limitations of various bus technologies in data communications, based on the practical applications of bus technology adopted in ZXR10 data communication products. The paper holds the idea that, parallel bus can't adapt to high-speed transfers due to self-limitations, and high-speed serial point-to-point bus will substitute for traditional parallel bus; data transfer will not be carried out simply by drive circuit and parallel bus, but by special high-speed serial bus; the traditional mode of single bus loading multi-device is disappearing, and a centralized switch module is replacing the bus function in a mode of one switch module connecting all devices via high-speed point to point serial bus.