The CPU(Central processing unit)consist of. The CPU (Central processing unit) consist of The CPU (Central processing unit) consist of 1. Input, Output, and Processing 2.Control Unit, Primary storage, and Secondary storage 3. Control unit, arithmetic logic unit. Function of control unit in the CPU.he CPU(Central processing unit)consist of. The CPU (Central processing unit) consist of The CPU (Central processing unit) consist of 1. Input, Output, and Processing 2.