利用I/O端口实现大容量数据存储器的扩展

单片机的存储器容量一般都比较小 ,在标准的应用系统中往往难以进行扩展。本文以 STD总线应用系统为例 ,给出了一种利用 I/O端口实现大容量数据存储器扩展的方法 ,该方法简单可靠 ,使用方便。可以推广应用于其它类型的微机系统中。

Memory capacity of single-chip processor is general small.It is difficult to ext end data memory in a standard system.In this paper,with STD bus system as an exa mple,a method of mass data memory extension using I/O port is given.It is proved simple,reliable and easy to use.This method can be used in other kind of micro- processor based systems.