Any processor has an 'architecture' and an 'organization' of its own. Further it has its own set of instructions it can execute (known as 'Instruction Set'), there is some decode logic to interpret each unique instruction, an 'ALU' that actually carries out arithmetic and logical operations on data, and 'registers' to hold the processed and to-be processed data. This is not all a processor has, but the minimum it needs.
The image gives a rough idea about a processor. The dotted line is boundary of processor and other connected stuff is its periphery.
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Technically, a processor is a complex assembly of digital circuitry used to process data. And this belongs to any processor in the world. Although any processor would handle and operate-on data, there are many different types and kinds of processors. This is because the data being processor is of various forms and may require to be processed in certain manner.
Depending on the environment in which a processor is used, there are following types of processors: The processor can be viewed as integration of two things : a data path and a control unit.
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