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Microcomputer-principle.rtf

于 2013-05-22 发布 文件大小:53KB
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代码说明:

  存储器(RAM 6264)扩展 可编程并行接口(8255)扩展 可编程计数/定时器(8253)扩展 A/D、D/A转换 可编程串行通信接口(8251)扩展   (Memory (RAM 6264) extended programmable parallel interface (8255) extended the programmable counter/timer (8253) Expansion A/D, D/A conversion programmable serial communication interface (8251) extended)

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