The questions relate to Microprocessor.

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b) Consider the AVR assembly code given in Listing 1. I. All instructions in the program are 2 bytes long. What is the size of the code in bytes? ii. Explain the function of the symbols '@O' and '@1' in the code. iii. Determine the maximum delay this code can generate. Show all your workings. Assume the processor is operating at 8 MHz iv. Give sample code showing how this macro could be called in AVR assembly code? V. Write a subroutine that could achieve the same delay as this macro. Give sample code showing how this subroutine could be called vi. Discuss how longer delays could be achieved using the subroutine you wrote in part (v). TO Listing 1 .MACRO loop: delay Idi @0,@1 nop nop nop dec @O brne loop .ENDMACRO