Fetch Execute Cycle: Task 1

Fetch-Execute Cycle:

CPU are the initials that stand for Central Processing Unit

Three main components of the CPU:

• Arithmetic Logic Unit (ALU)
• Control Unit (CU)
• Registers.

In relation to computer architecture, buses transfers data between components inside a computer, or between computers. 

There are different functions in the fetch-execute cycle:

• The Program Counter - incremented by 1 so that it now has the address of the next instruction. Controls the activities of the computer by executing (carrying out)
• The Address Bus - The memoryaddress of the instruction to be fetched istransmited from the program counter to the RAM through the address bus.
• The Data Bus - when the instructon is being executed. Data is transmitted from the RAM back to the instruction register in the CPU through the data bus.
• Decoder - In the countrol unit and works out what the intruction means and what has to be done to the data.
• The Arithmetic and Logic Unit - The control unit instructs the ALU to carry out and execute instructions by performing all the mathematical calculations of the CPU