位扩展

位扩展指的是用多个存储器器件对字长进行扩充。

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字扩展

位扩展的连接方式是将多片存储器的地址、片选CS、读写控制端R/W相应并联，数据端分别引出。

方法1-线选法

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方法2-译码片选法

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计组-译码器

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