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microcontroller has cpu, parallel i/o bus, memory (both rom and ram) on a single chip.
microprocessor can execute different kind of functions such as additions, subtraction, multiplication, division etc..., but doesn't have everything such as memory and i/o bus on a single chip.
As the technology is progressing the two are becoming indistinguishable. PR080 has given a good definition but it isn't true always now. Freescale is now calling all of its microcontrollers (As per PR080's def) as microprocessors.
hey hi
basically the main difference lies in the fact that a microcontroller contains the memory,input\output, n all other things on a single chip...!
however in case of Microprocessors like 8085,8086 etc these devices have to be connected as peripherals through interefacing techniques...!
Thus a microprocessor is a basic part of a microcontroller.
As my friends have said microcontroller contains processor, input output ports, RAM, etc.
In short it has all the things which are basic and necessary to make a system or we can say using this single chip you can make a basic system.
While in case micro processor its just processor(which is one part of Microcontroller IC). Here you need to interface input/output, RAM etc etc.
to make more clear you need to read the Microcontoller bokk by MAZIDI or AYLA or any standard book. most of Standard book having this difference in the beginning chapters.
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