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引用本文：

唐茂华.RS422通信接口卡的设计与实现[J].电讯技术，2004，44（5）：161 - 165. [点击复制]
.Design and Realization of RS422 Communication Card[J].，2004，44（5）：161 - 165. [点击复制]

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RS422通信接口卡的设计与实现

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摘要:

介绍了四通道的RS422通信接口卡设计与实现。该接口卡可以用于高速的数据通信中。选择的通信接口芯片允许多达128个同样的接口芯片接在同一总线上，为多机通信的实现提供了极大的方便。文中还描述了Windows98下的通信程序的实现方法。

关键词: 通信接口 RS422 Windows98 通信程序接口卡接口芯片总线四通道数据通信多机通信

DOI：10.3969/j.issn.1001-893X.

基金项目:

Design and Realization of RS422 Communication Card

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Abstract:

The design and realization of four channels RS422 communication card is introduced. The card can be used in high speed data communication. It allows 128 interface ICs to connect with each other on one bus, which makes it easy to use the card in multi-computer system. The implementation of communication program in windows98 is described.

Key words: Data communication,Communication card,Universal asynchronous receiver and transmitter(UART),Industrial Standard Architecture BUS,First in first out