What is a Microprocessor ?
A microprocessor is an integrated circuit (IC) which incorporates core functions of a computer's central processing unit (CPU). It is a programmable multipurpose silicon chip, clock driven, register based, accepts binary data as input and provides output after processing it as per the instructions stored in the memory.
Block Diagram of a Computer
Block Diagram of a Computer
Why we need a Microprocessor ?
Thank you "B B DWIVEDI" for asking this question in the comment. So I thought...