Introduction of Microprocessor

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Introduction of Microprocessor

By | Jan. 2013
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Introduction to Microprocessors

Gursharan Singh Tatla
mailme@gursharansingh.in
www.eazynotes.com

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03-Aug-2011

Introduction to Microprocessors
 The microprocessor is one of the most important

components of a digital computer.
 It acts as the brain of the computer system.
 As technology has progressed, microprocessors

have become faster, smaller and capable of doing
more work per clock cycle.
 Sometimes, microprocessor is written as

µP.

( µ is pronounced as Mu )
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Introduction to Microprocessors
 Definition:

Microprocessor is the controlling unit or CPU of a
micro-computer, fabricated on a very small chip capable
of performing ALU operations and communicating with
the external devices connected to it.

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A Computer
 A computer:
 Accepts the data from the user.
 Stores the data and the set of instructions supplied by

the user in memory.
 Processes the data according to the instructions in the

processing unit.
 Communicates the result to the user or stores it for

further reference.

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A Computer
 A computer has the following units:
 Input Unit
 Output Unit

 Memory Unit
 Central Processing Unit

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A Computer
 INPUT UNIT
 The input unit consists of the devices which accept the data and

instructions from the user and communicates it to the CPU.
 The various input devices are: keyboard, mouse, joystick, trackball

etc.

 OUTPUT UNIT
 It provides the result of the various operations performed by the

CPU to the user.
 The various output devices are: printers, monitors, loudspeakers

etc.
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A Computer
 CENTRAL PROCESSING UNIT (CPU)
 The CPU is the heart and nerve centre of the computer.
 It fetches the instruction and data from the peripheral...
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