好时光2017下载:一段单片机指令,help me

来源：百度文库 编辑：杭州交通信息网 时间：2024/05/06 12:45:59
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
一段单片机指令,help me Help me ! help me !! help me ! help me ! HELP ME!!HELP ME!! HELP HELP HELP ME HELP HELP HELP ME!!! help me help me help me help me help me help me help me help me help me help me help me! help me !! HELP ME!