calculate .. (T delay) (Time executed) need help with explain please

[sam001]

find how many the time will loop be executed? what is the total delay of this subroutine with 8051 processor at 11.0592MHZ? (Machine cycle, Mov = 1 , DJNZ = 2 , RET = 2)

Delay: MOV R5,#100
Back: MOV R2, #200
Again: MOV R3, #250
Here: DJNZ R#,Here
DJNZ R2, Again
DJNZ R5, back
RET




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THANKS

 

[Ian Rogers]

Approximately 1.5 mS .... Assuming above cycle machine instruction.... 12 clock cycles per instruction..

time = 1.085μS per instruction

MOV = 1
MOV = 200
MOV = 250
DJNZ = 400
DJNZ = 500
RET = 2
Total = 1353 instruction cycles