Control Unit controls operations of other parts of CPU as well as all parts of computer by sending a control signal, e.g.

• control sequence of instruction to be executed
• control flow of data among all parts of computer
• interpret instructions
• regulate timing of procressor
• send control single to and recieve control single from peripheral devices

Program Counter (PC), Instruction Decoder, Instruction Register (IR), Process Status Register and General Purpose Registers are all inside CU