A microprocessor is an integrated programmable device having computing and decisions making power similar to the CPU of a computer.
Definition of Microprocessor:-
In other words, it is a programmable device used in a computer system. Which is used to off/on the device attached to the computer. As compared to the earlier system using CPU the microprocessor makes the computer portable.
It is easily shifting from one place to another place. There are different types of microprocessor used in computersystem :-
Generation of microprocessor:-
1st Generation of microprocessor:-
It is introduced in between 1971 to 1972.
In this processor the processed serially is Fetching, Decoding, and execution.
After execution, the instruction pointer is updated by the microprocessor.
After updating the instruction is fetched.
It was a 4bit processor for example- INTEL4004.
2nd Generation of microprocessor:-
It is introduced in 1973.
It was an 8-bit processor on that is the word length is 8bit, the main difference between the 1st generation and 2nd generation is the use of semiconductor device and increase of execution speed.
Example:- 8008, 8088, 8085
3rd generation of computer:-
It was introduced in 1978.
It was a 16-bit processor that is the word length is 16bit.
It performs like a mini-computer.
It is also faster than the 2nd generation of computers.
Example:- 8086, 80286, Z8000
4th Generation of microprocessor:-
It was introduced in 1985.
The processor was a 32bit processor that is the wordlength is 32bit.
The example is:- INTEL80386, 80486, and Pentium.
5th Generation of microprocessor:-
It was introduced in 1995.
In this processor, the word length is increased up to 64bit.
It comes in a 2bit length that is 32bit as well as 64bit.
For example;- pentium pro, pentium II, pentium III, pentium IV, pentium code, octa core processor.
The cellular processor also comes in 64bit.