CPU(Central Processing Unit)

Table of Contents :o Objectiveo What is CPU?o History of Central Processing Unit.o Components of CPU.o Function of the CPU.o Assessment on your understanding.

Objective:To understand more and gives an idea on how the brain ofcomputer works, by interpreting

it’s history , component andfunctions.

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What is CPU?

The Central Processing Unit (CPU) is simply the central processor or the processor where most calculation takes places.

The Brain of the Computer.

The "fixed-program computers.

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History of Central

Processing Unit

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CPU started:In the '40s, mathematicians 

John Von Neumann, J. Presper Eckert and John Mauchly came up with the concept of the stored instruction digital computer.

On 1970’s a component of mainframe

computer known as CPU is a steel cabinet bigger than a refrigerator full of circuit boards crowded with transistors.

In 1971 the first microprocessor invented. The 4004 microprocessor .

In 1972 The 8008 was the first of many 8- bit microprocessors to fuel the home computer revolution.

In 1979, Intel delivered the 8088 and IBM engineers used it for the first PC . From 8086.

Cache RAM invented by the microprocessor engineers .

Cache Grows Up

Cache Splits Up

CPU made smaller and faster.

Components of CPU

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Component

Control Unit

Arithmetic Logic Unit

Memory Unit/Register

Description ALU(Arithmetic Logic Unit)- performs simple

arithmetic and logical operations .

CU(Control Unit)-It reads and interprets instructions from memory and transforms them into a series of signals to activate other parts of the computer.

MU/Register(Memory Unit)- is the part of the computer that holds data and instructions for processing.

Function of the CPU

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Fetch -taking the instruction from the memory.

Decode- translating and decoding Assembly code binary instructions which are understandable to your CPU.

Execute- execute calculation, move data and jump to different address.

Store- CPU dive some data after executing the instruction and store data being instructed.

Central Processing Unit

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The First CPU

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4004 Microprocessors

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8008 microprocessors

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8088 8086 IBM

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Quiz

The first microprocessor invented by Intel Corporation ?

Performs simple arithmetic and logical operations?

• The four major function the CPU?