51单片机的 pc值怎么算?如:已知程序执行前有A=02H,SP=52H,(51H)=FFH,(52H)=FFH.下述程序执行后:POP DPHPOP DPLMOV DPTR,#4000HRL AMOV B,AMOVC A,@A+DPTRPUSH AccMOV A,BINC AMOVC A,@A+DPTRPUSH AccRETORG 4000HDB 10H,80H,30H,50
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![51单片机的 pc值怎么算?如:已知程序执行前有A=02H,SP=52H,(51H)=FFH,(52H)=FFH.下述程序执行后:POP DPHPOP DPLMOV DPTR,#4000HRL AMOV B,AMOVC A,@A+DPTRPUSH AccMOV A,BINC AMOVC A,@A+DPTRPUSH AccRETORG 4000HDB 10H,80H,30H,50](/uploads/image/z/362063-47-3.jpg?t=51%E5%8D%95%E7%89%87%E6%9C%BA%E7%9A%84+pc%E5%80%BC%E6%80%8E%E4%B9%88%E7%AE%97%3F%E5%A6%82%EF%BC%9A%E5%B7%B2%E7%9F%A5%E7%A8%8B%E5%BA%8F%E6%89%A7%E8%A1%8C%E5%89%8D%E6%9C%89A%3D02H%2CSP%3D52H%2C%EF%BC%8851H%EF%BC%89%3DFFH%2C%EF%BC%8852H%EF%BC%89%3DFFH.%E4%B8%8B%E8%BF%B0%E7%A8%8B%E5%BA%8F%E6%89%A7%E8%A1%8C%E5%90%8E%EF%BC%9APOP+DPHPOP+DPLMOV+DPTR%2C%234000HRL+AMOV+B%2CAMOVC+A%2C%40A%2BDPTRPUSH+AccMOV+A%2CBINC+AMOVC+A%2C%40A%2BDPTRPUSH+AccRETORG+4000HDB+10H%2C80H%2C30H%2C50)
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