QIU Tianshuang   

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Language:English

Paper Publications

Title of Paper:一种通用24线RS—232 I/O接口电路

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Date of Publication:1996-02-15

Journal:集成电路应用

Issue:02

Page Number:20-22

Key Words:接口电路;I/O接口;RS;原理图;接口单元;三态缓冲器;供电部分;编程接口;数据寄存器;内部寄存器;

Abstract:<正> 本文介绍一种通用24线RS—232I/O接口电路。这个电路包括四个部分:(1)RS—232接口单元;(2)功能选择单元;(3)移位寄存器和缓冲单元;(4)8255可编程接口单元。此外,还有一个供电部分。整个电路的原理图及电路图如图1和图2所示。

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