Fetch Execute Cycle I 0.0 / 5 ? ComputingHardwareGCSEAQA Created by: Mr_MackintoastCreated on: 02-03-17 17:54 What is the Fetch Execute Cycle? CPU -(Address Bus)> RAM (Data Bus either direction) CPU 1 of 9 What are the two sections of the CPU? The Control Unit and the Arithmetic Logic Unit 2 of 9 What does the control unit do? The control unit uses electrical signals to direct the system to execute the instructions in stored programs 3 of 9 What does the Arithmetic Logic Unit do? The Arithmetic Logic Unit carries out all of the arithmetic and logical operations (e.g. +, -, x, >) 4 of 9 What is the address Bus? The Address Bus tells RAM where to get the instructions from by the Control Unit. 5 of 9 What is the Data Bus? The data bus delivers the instructions from RAM to the processor 6 of 9 What does the number of bits determine? The number of bits is the number of wires the data bus has. More wires means more instructions can be given to the processor at one time 7 of 9 What does the clock do? The clock is used to say when to get the next instruction 8 of 9 Where and What is the secondary storage (in the fetch execute cycle) Secondary Storage is attached to the address bus and is not as good as RAM. It holds data when the computer is off. 9 of 9
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