摘要
由于８２５９Ａ可编程中断控制器与单片机的信号不兼容，使它们之间的接口变得比较复杂。很多文献在介绍单片机与８２５９Ａ的接口时，虽然注意到要产生ＩＮＴＡ信号，但却忽略了８２５９Ａ的ＣＳ、ＲＤ信号与ＩＮＴＡ的相互关系，因而接口电路不能工作。本文针对上述情况，在简要介绍８２５９Ａ工作原理的基础上，着重分析８２５９Ａ工作原理中一些容易忽视和较难理解的问题，并给出８２５９Ａ可编程中断控制器与８０３１单片机的实用接口电路和具体编程方法。本文对于从事单片机硬件设计的科技人员有较大的帮助。
Incompatability of programmable interrupt controller 8259A with signals of computer on-slice causes the interface between them complicated. When introducing the interface of computer on-slice with controller 8259A, many publications note the generation of INTA signals, but neglect the interrelation between CS, RD signals of8259A and signals of INTA, therefore,the interface circuit cannot work. This paper, based on presenting briefly foe working principle of 8259A, lips the stress on analysing the problems in working principle of 8259A which areeasy to be neglected and difficult to be understood, and offers the practical circuit interfacting the programmable interrupt controller 8259A with computer on-slice 8031 and the concrete method for programming. This paper will be helpful for technical personnel engaged in the design of hardware for computer on-slice.
出处
《人民珠江》
1996年第6期6-10,共5页
Pearl River
关键词
程序控制器
单片机
接口
编程
programmable interrupt controller, computer on-slice, interface, programming
