"The CPU or the Central Processing unit is the brain of the computer and the single most important chip in the computer."

 

 

The CPU is built on a single chip called a microprocessor. The main function of the CPU is to accept and execute the instructions stored in the computer's main memory.

The CPU consists of two major components: the control unit (CU) and the arithmetic and logic unit (ALU)

(1) The control unit

The control unit controls the overall operations of the computer. Some major functions of the control unit are :

 

(2) The arithmetic and logic unit (ALU)

The arithmetic and logic unit performed the arithmetic and logical operations. It is responsible for the manipulation of data which is brought from the memory unit or the control unit. The arithmetic and logic unit consists of an accumulator (ACC), a set of logic circuits , and a status register (SR).

Moreover, Holds data and instructions which are in current use. These are kept in the Main Store or Memory Unit.

Next                       Home