PRESENTATION ON CPU

By Israt Jahan & Md.Hafizul Islam

CPU means central prosessing unit. It is the part of the

computer that carries out the instractions of a computer

program.It is the unit that reads and executes program

instractions.It is also called the brain of computer.

What is CPU???

1.CU (Control Unit)2.ALU (arithmetic / logic unit)

Components of CPU:

BLOCK DIAGRAM OF CPU:

CU (Control Unit):

All the computer’s resources are managed from the control unit. The function of control unit is to coordinate with all the computer activities. The control unit contains the CPU’s instructions for carrying out commands

ALU (arithmetic / logic unit)

When the control unit encounters an instruction that involves arithmetic or logic operation, it passes control to the second component of the CPU, the arithmetic/logic unit (ALU).

The CU and ALUare in the CPU.

Registers:Special-purpose

High-speedTemporary storageLocated inside CPU Instruction register:

Holds instruction currently being executed

Data register:

Holds data waiting to be processed

Holds results from processing

Types of Memory:ROM - Read Only Memory(contains the basic input output

system or BIOS)

RAM - Random Access Memory

(user programs and data go here)

The ROM is nonvolatile because it will notlose its contents when powered down.

RAM plugs into sockets on the motherboard.

The CPU can read RAM much faster than it can the hard disk.

CPU Manufacturers:

•Motorola•AMD•Cyrix

• Intel

• 8086 1978• 8088 1979• 80286 1982• 80386 1985

• 80486

1989• Pentium

1993• Penium Pro

1995• Pentium II

1997

CPU Models:

SPECIAL THANKS TO INDRANI MANDAL (ASSISTANT PROFESSOR AT JKKNIU)