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
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