Abstract :When we have to learn about a new computer we have to familiarize about the machine capability we are using, and we can do it by studying the internal hardware design (devices architecture), and also to know about the size, number and the size of the registers.

A micro controller is a single chip that contains the processor (the CPU), non-volatile memory for the program (ROM or flash), volatile memory for input and output (RAM), a clock and an I/O control unit.

Also called a "computer on a chip," billions of micro controller units (MCUs) are embedded each year in a myriad of products from toys to appliances to automobiles.



For example, a single vehicle can use 70 or more micro controllers. The following picture describes a general block diagram of micro controller.

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