Fetch Execute Decode cycle

Question 1

What happens at the fetch stage of the fetch execute decode cycle

Answer 1

The address of the next instruction is added to the address bus, which the main memory and transfers the instruction (in the given location) via the data bus back to the CPU and it is stored in a register

Question 2

What happens at the decode stage of the fetch execute decode cycle?

Answer 2

The CU makes sense of the instruction stored in the CIR according to the “Instruction set”. The instruction is decomposed into its individual components and based on this the appropriate circuitry is prepared for execution

Question 3

What happens at the execute stage of the fetch execute decode cycle

Answer 3

The control unit activates the processing required by the instruction and the output would be stored in a register.