Find the time delay for the delay subroutine shown below if the system has an AV

Question

Find the time delay for the delay subroutine shown below if the system has an AVR with a frequency of 10MHz:

If answer is not integer, represent it truncating to 3 digits after the decimal point. Do not use comma separator in big numbers.

LDI R16, 150

BACK:LDI R17, 100

HERE:NOP

DEC R17

BRNE HERE

NOP

NOP

DEC R16

BRNE BACK

Incorrect
The correct answer is: 60750
Mark 0.00 out of 1.00

Correct
The correct answer is: 0.100
Mark 1.00 out of 1.00

Incorrect
The correct answer is: 100
Mark 0.00 out of 1.00

ns

Incorrect
The correct answer is: 6075
Mark 0.00 out of 1.00

Incorrect
The correct answer is: 6.075
Mark 0.00 out of 1.00

ms

Can you saw me how to do this please? Assembly Language

Explanation / Answer

1.                            LDI R16, 150      1 cycle

2.            BACK:    LDI R17, 100      1 cycle

3.            HERE:    NOP                       1 cycle

4.                            DEC R17               1 cycle

5.                            BRNE HERE          2 cycles

6.                            NOP                       1 cycle

7.                            NOP                       1 cycle

8.                            DEC R16               1 cycle

9.                            BRNE BACK         2 cycles

1. Inner loop: The statement from 3-5 executes 100 times which is (1+1+2) 4 * 100 = 400 cycles

Outer loop: statement 2, 3-5, 6, 7, 8, 9 executes 150 times which is 400 + 1+ 1+ 1+ 2 = 405 * 150 = 60750 machine cycles

2.

Given that frequency is 10 Mhz, Time period for each machine cycle is 1 / (10 * 106) = 0.1 micro second, Time period for 60750 cycles is 60750 * 0.1 micro seconds = 6075 micro seconds = 6.075 milli seconds

Please Rate it if you find the answer is helpful….Thanks…:)

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