Control unit (CU)
How does a CPU work?
A control unit coordinates how data moves around a cpu. The control unit (CU) is a component of a computer's central processing unit (CPU) that directs operation of the processor. It tells the computer's memory, arithmetic/logic unit and input and output devices how to respond to a program's instructions.[1]
Major parts of a CPU
These videos are truly superb to help you understand parts of a CPU, and how they work.