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c51单片机外扩 62256 静态RAM

作者：时间：2016-11-18 来源：网络

学习汇编语言寻址方式时理论的知道但是想知道地址总线物理的连接

所以自己就买了一个62256芯片(32K 静态RAM)进行连接，然后写程序测试。

上面原理图中有个问题 62256芯片A0-A7没有接需要用 74HC573

74HC573的链接图

然后网上又找到一张图

C51单片机中有ALE引脚，这个引脚会控制P0脚输出的是地址还是数据

使用原件 AT89S51 62256 74HC573

C51单片机建议买STC公司生产的40脚双列直插的可以自己制作串口下载线

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关键词： c51单片机外扩62256静态RA

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