计算机串行通信接口及其应用

Computer Serial Communication Interface and Its Application

串行通信是指计算机主机与外设之间以及主机系统与主机系统之间按位进行传输数据的一种通信方式。串行通信所需的传输线少,成本低,不仅适用于近距离的人-机交换及串行存储设备、实时控制系统,而且可借助现有的电话网等通信通道实现远距离传输,所以串行接口是计算机应用系统常用的接口。在设计通信接口时,必须根据需要选择接口标准,并考虑传输介质、电平转换等问题。

Serial communication is between the host computer and peripherals as well as between the host systems for the transmission of data by digital means of communication. As the serial communication needs less transmission line and is low cost, it is not only suitable for the man-machine exchange at close range, serial memory devices and real-time control system, but also the existing telephone network and other communication channels can be employed to achieve long-distance transmission. Therefore, the serial interface is commonly used as a interface of computer application system. In the design of communication interface, the selection of interface standards must be performed first, and the transmission medium and level translator should be considered.