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Chapter 01

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The difference between a Micro-Processor and a Micro-Controller

S.No. Micro-Processor Micro-Controller
1 Micro-Processor is like a king, it needs a lot of assisting components Micro-Controller is like "One Men Army", its self-contained.
2 Must have external memory for program storage: usually eepROMs are used. Contains inbuilt Flash memory to store programs.

(Flash memory is a non-volatile computer storage chip that can be electrically erased and reprogrammed. Its a special type of EEPROM: Electrically Erasable Programmable Read-Only Memory)
3 An external clock/crystal oscillator circuit is required

(A clock generator is a circuit that produces a timing signal known timing signal for use in synchronizing a circuit’s operation)
Modern Micro-Controllers have inbuilt clock generator, but to operate at high speed external clock source can be optionally used)
4 - We can say that, every Micro-Controller contains an inbuilt Micro-Processor

A Picture is worth 100 words: 1-Micro-controller is worth 1-Mirco-Processor + 100 components (inside the same chip) :-

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