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SEMINAR ON EMBEDDED MICROPROCESSOR

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WHAT IS EMBEDDED MICROPROCESSOR?

When a single IC contains all essential components of a microcomputer it is known as single-chip microcomputer.
When a set of single-chip microcomputer are embedded in
the system which they control, they are called Embedded
Controllers .
Some microprocessors are used for embedded-control applications which are called embedded-microprocessors.

CHARECTERISTICS

Basically we can define embedded microprocessor as having the following characteristics:
Dedicated to controlling a specific real-time device or function.
Self-staring , not requiring human intervention to begin.
Self-contained with the operating program in some kind of non-volatile memory.

COMPONENTS

An embedded microprocessor typically contains the following components:
a microprocessor
RAM
Non-volatile memory : EPROM, ROM, flashed memory , battery backed RAM and so froth.
I/O
Interrupt Controller
DMA channels
Clock generator
Peripheral chip-select
Dynamic RAM refresh control unit
Local bus controller

Development Environment

To develop application on an embedded microprocessor some basic tools are essential:
A development system or Cross-Compiler
A PROM programmer
Debug Hardware
Many designers use an emulator for system debugging , as it allows engineers to insert break-points in the code so that the microprocessors operation can be stopped.

What is the need of an Embedded microprocessor ?

Cost: The cost of developing a firmware for embedded system is a non-recurring expense. The actual cost of the finished product can be very low.
Flexibility: For hardware based system , the control electronics need to be redesigned, but in microprocessor based system the only change may be a few lines of code.
Programmability: the proper embedded microprocessor permits you to have the same hardware perform different tasks.