Fetch, Decode, Execute Flashcards
1
Q
Fetch
A
The address of the instruction that needs to be processed next is copied from the (PC) to the (MAR).
PC is incremented to point to the next instruction that will be needed when the cycle starts again.
instruction stored at the location held by the MAR is copied to the MDR.
2
Q
Decode
A
Control Unit decodes the instruction and sends control signals to the component within or outside the CPU that needs to act.
3
Q
Execute
A
CU sends the instruction to the appropriate component and the instruction is executed
