CENTRAL PROCESSING UNIT

Written by: Gizem Gulsen

INTRODUCTION

• The central processing unit is where all the calculations and logic operations take place.

• CPU performs data-processing operations.

Main Parts of CPU

• Arithmetic Logic Unit (ALU)

• Control Unit (CU)

• Registers

Arithmetic Logic Unit

• ALU performs the required microoperations(addition,subtraction,shifting,increment,decrement etc.) for executing the instructions.

• Alu performs an operations and the result of the operation is transferred to a destination register.

Control Unit

• The control unit(CU) supervises the transfer of information among the registers and instructs the ALU as to which operation to perform.

Model of Control Unit

Registers

• A register is a group of flip-flops with each flip-flop capable of storing one bit of information.

I OpCode Address

15 14 12 11 0

IR

Resources

• Computer System Architecture

M.Morris Mano

• Computer Organization and Architecture William Stallings