Suppose that the following figure is the timing diagram of a read cycle for program memory...

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Suppose that the following figure is the timing diagram of a read cycle for program memory in PIC18 system. Suppose that PC-0102H and WREG=20H, and that the instruction involved is MOVLW FEH. ZZIX address lines enable read ! 1 AO-A20 XIZI Z ZZ IIIX DO-D15 XIII (a) Which phase(s) of an instruction cycle will contain the read cycle? Explain. What is the content of the address bus ? Explain. (c) Describe the main steps in this read cycle. (2 marks) (2 marks) (4 marks) Suppose that the following figure is the timing diagram of a read cycle for program memory in PIC18 system. Suppose that PC-0102H and WREG=20H, and that the instruction involved is MOVLW FEH. ZZIX address lines enable read ! 1 AO-A20 XIZI Z ZZ IIIX DO-D15 XIII (a) Which phase(s) of an instruction cycle will contain the read cycle? Explain. What is the content of the address bus ? Explain. (c) Describe the main steps in this read cycle. (2 marks) (2 marks) (4 marks)

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SOLUTION a The read cycle will occur during the phase of the instruction cycle known as the instruct... View the full answer