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hardy_6817
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樓主  發(fā)表于: 2010-09-04 10:38
有指令能監視某個(gè)寄存器是否變化嗎？例如監視D200，如果D200的數據改變能夠產(chǎn)生一個(gè)輸出。
zldxj
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1樓  發(fā)表于: 2010-09-04 18:09
用程序實(shí)現，先將D200的值傳給另一個(gè)寄存器如D300，再在之前的行插入兩個(gè)寄存器比較的指令，則D200每變化一次，會(huì )產(chǎn)生一個(gè)不等于D300的脈沖輸出。（下一周期兩值又會(huì )相等）

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