Fetch-Decode-Execute Cycle

Question 1

What are the three key types of bus?

Answer 1

Address, Data, Control bus

Question 2

Explain the FDE CYCLE

Answer 2

1) The instruction is fetched from this address in RAM and transferred into the Current Instruction Register (CIR).
2) The instruction is decoded by the control unit to understand what actions must be taken.
3) The instruction is executed using the relevant components e.g. ALU adding values together.