Question 1 The subroutine listed below implements a fixed delay. Complete table

Question

Question 1 The subroutine listed below implements a fixed delay. Complete table T1.1 and hence determine the total that would occur in using this subroutine. ndude the CALL instruction that will e this subroutine in you xecute time calculation and assume the PIC master dock is 1 MHz. TEMP EQU 0x1D Delay MOVLW 0x80 MOVWF TEMP NOP Delay 1 NOP DECFSZTEMP.F GOTO RETURN (8 marks) Instrueian Instruction Odes Number of Table Hence total number of instruction cycles a Hence total time consumed by the subroutine is

Explanation / Answer

Instruction Inst. Cycles No. of Executions Total Ins. Cycles

MOVLW 1 1 1

MOVWF 1 1 1

NOP 1 1 1

NOP 1 1 1

DECFSZ TEMP, F 1+1 8+1 9

GOTO 2 2 2

RETURN 2 2 2

Total No. of Instruction Cycles = 17

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