Question

The sequence of steps performed by microprocessor to fetch the data byte from memory :
• [A.] The byte is placed in the instruction decoder of the microprocessor.
• [B.] The byte from the memory location is placed on data bus.
• [C.] The control unit sends the control signal RD to enable the memory chip.
• [D.] Bus microprocessor places the 16-bit memory address from program counter on the address bus. Choose the correct answer from the options given below :

• A. A, B, C, D
• B. D, C, B, A
• C. D, B, C, A
• D. A, C, B, D

Hint:

Memory read sequence: \[ \text{Address on bus} \rightarrow RD \text{ signal} \rightarrow \text{Memory places data on data bus} \rightarrow \text{Processor decodes instruction} \]

Answer 1

The Correct Option is B