anshita ppt

8/8/2019 Anshita Ppt

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By :~ ANSHITA ARYA

4thyr EC

SMCET


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R S POWER INDIAy It was established in 1998, and is located in RIICO

industrial area in jaipur.

y It manufactures relays, transformer, UPS, inverter.

y During last seven years its turnover is 100%.


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What is an Embedded SystemAn Embedded System is a microprocessor basedsystem that is embedded as a subsystem, in a

larger system (which may or may not be acomputer system).

OI


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Application areas

y Automotive electronics

y Aircraft electronics

y Trains

y Telecommunication

y Medical system


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Essential Componentsy Microprocessor / DSP

y Sensors

y Converters (A-D and D-A)y Memory (On-chip and Off chip)

y Communication path with the interactingenvironment


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A Mix of Disciplinesy Application Domain (Signal processing, control )

y Software Engg. ( Design Process plays an important role)

yProgramming Language

y Compilers and Operating System

y Architecture Processor and IO techniques

y Parallel and Distributed Computing

y Real Time Systems


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Importance of Embedded Software

and Embedded Processors

... the New York Times has

estimated that the average

American comes into contact with

about 60 micro-processors every

day.... [Camposano, 1996]

Latest top-level BMWscontain over 100 micro-

processors

[Personal communication]

Most of the

functionality

of embedded

systemswill be implemented

in software!


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ELETRONIC COMPONANTSElectronic

Components

PasiveComponents

Activecomponents


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ResistorsCapacitors

Inductors

Diodes

Interface components


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Transistors

BipolarField effect

Integrated circuitsAnalog

DigitalMicrocontroller


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Integrated circuits (ICs) are multi-terminal

devices that provide an array of functions andapplications far to numerous to list here.


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Pins are numbered sequentiallyin a counterclockwise direction.

Pin 1 is often identified with adot or a dimple.

The pin end of the chip is oftenidentified with a notch.

Notch

Dimpl

ePin 1

Pin 7

Pin 8Pin 14


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Different aspects of a

microprocessor/controller

y Hardware :Interface to the real world

y Software :order how to deal with inputs


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The necessary tools for a

microprocessor/controllery CPU: Central Processing Unit

y I/O: Input /Output

y

Bus: Address bus & Data busy Memory: RAM & ROM

y Timer

y Interrupt

y Serial Porty Parallel Port


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CPU

General-

Purpose

Micro-processor

RAM ROM I/O

Port

TimerSerial

COM

Port

Data Bus

Address Bus

General-Purpose Microprocessor System

Microprocessors:

y CPU forComputers

y No RAM, ROM, I/O on CPU chip itself

y ExampleIntels x86, Motorolas 680x0

Many chips on mothers board

General-purpose microprocessor


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RAM ROM

I/O

PortTimer

Serial

COM

PortMicrocontroller

CPU

y A smaller computer

y On-chip RAM, ROM, I/O ports...

y ExampleMotorolas 6811, Intels 8051, Zilogs Z8 and PIC 16X

A single chip

Microcontroller :


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Microprocessor

y CPU is stand-alone, RAM,ROM, I/O, timer areseparate

y designer can decide on theamount of ROM, RAM andI/O ports.

y expansive

y versatility

y general-purpose

Microcontroller

CPU, RAM, ROM, I/O and

timer are all on a single chip

fix amount of on-chip ROM,RAM, I/O ports

for applications in which cost,

power and space are critical

single-purpose

Microprocessor vs. Microcontroller


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Block Diagram

CPU

On-chip

RAM

On-chip

ROM for

program

code

4 I/O Ports

Timer 0

Serial

PortOSC

Interrupt

Control

External interrupts

Timer 1

Timer/Counter

Bus

Control

TxD RxDP0 P1 P2 P3

Address/Data

Counter

Inputs


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Pin Description of the 8051

1234567

891011121314151617181920

40393837363534

33323130292827262524232221

P1.0P1.1P1.2P1.3P1.4P1.5P1.6

P1.7RST

(RXD)P3.0(TXD)P3.1

(T0)P3.4(T1)P3.5

XTAL2XTAL1

GND

(INT0)P3.2(INT1)P3.3

(RD)P3.7(WR)P3.6

VccP0.0(AD0)P0.1(AD1)P0.2(AD2)P0.3(AD3)P0.4(AD4)P0.5(AD5)

P0.6(AD6)P0.7(AD7)EA/VPP

ALE/PROG

PSENP2.7(A15)P2.6(A14)P2.5(A13)P2.4(A12)P2.3(A11)P2.2(A10)P2.1(A9)P2.0(A8)

8051

(8031)


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THANKING YOU

anshita ppt

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