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单片机扩展8259中断控制器的研究
引用本文:王月姣,朱家驹.单片机扩展8259中断控制器的研究[J].中南民族大学学报(自然科学版),2004,23(2):49-51.
作者姓名:王月姣  朱家驹
作者单位:1. 中南民族大学电子与信息工程学院,武汉,430074
2. 中南民族大学计算中心,武汉,430074
摘    要:针对8259中断控制器工作于MCS-80/85方式,从其工作过程及中断应答时序入手,介绍了8259与89C51单片机的硬件接口,设计了相应的初始化程序及中断服务程序,提出了三级中断嵌套的方法,较好地解决了单片机应用系统中存在多个外部中断源的矛盾与问题.

关 键 词:单片机  8259中断控制器  扩展
文章编号:1672-4321(2004)02-0049-03
修稿时间:2003年11月17

Research on SCM Extension 8259 Interrupt Controller
Wang Yuejiao Zhu Jiaju Wang Yuejiao Assoc Prof,College of Electronic and Information Engineering,SCUFN,Wuhan ,China.Research on SCM Extension 8259 Interrupt Controller[J].Journal of South-Central Univ for,2004,23(2):49-51.
Authors:Wang Yuejiao Zhu Jiaju Wang Yuejiao Assoc Prof  College of Electronic and Information Engineering  SCUFN  Wuhan  China
Institution:Wang Yuejiao Zhu Jiaju Wang Yuejiao Assoc Prof,College of Electronic and Information Engineering,SCUFN,Wuhan 430074,China
Abstract:As 8259 interrupt controller is working under MCS 80/85 mode, based on its working process and interrupt response time sequence, this article introduces hardware interface of 8259 and 89C51 SCM and also designs relevant initialization and interrupt service program, as well propose the method of 3rd level interrupt nesting, with which can solve problems and caused by various external interrupt source in SCM application system.
Keywords:SCM  8259 interrupt controller  extension  
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