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3. Control Unit

Parts of a CPU

The control unit has three main jobs

  1. It controls the way data moves around the CPU by controlling the buses.
  2. It controls and monitors the flow of data between the CPU and other components such as input devices, memory, graphics card etc
  3. It executes the instructions provided by the program.

The collection of instructions it can carry out is called the 'instruction set' of the CPU. The instruction set is hard-wired into the CPU when it was designed.

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Click on this link: CPU control unit