刀妹哪个皮肤好看2017:一段单片机指令,help me

来源：百度文库 编辑：中科新闻网 时间：2024/05/14 05:10:09
DEL: MOV R5,#04H
F3: MOV R6,#0FFH
F2: MOV R7,#0FFH
F1: DJNZ R7,F1
DJNZ R6,F2
DJNZ R5,F3
谁能告诉我这段程序延时多长时间啊,本单片机的晶振为12MHZ.
请告诉我一下它计算方法
谢谢
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