What is a microprocessor?

1)What is a microprocessor?
           A microprocessor is a semiconductor chip or a chip set those implements the central processor of a computer.It is the heart of a microcomputer.
          A microprocessor has three basic units and everything resides within these three units,they are:-

1.   Arithmetic and Logic unit(ALU)
2.   Control Unit(CU)
3.   Memory unit

          All these forms a CPU built into a single chip is called a microprocessor.

The microprocessor is a programmable logic device designed with flip-flops,registers and timing elements.A microprocessor has a set of instructions designed internally to manipulate data and communicate with peripheral.

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• *ALU:-An ALU is a digital circuit used to perform arithmetic and logic operations.
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• *CU:-The control unit (CU) is a component of a computer's central processing unit (CPU) that directs operation of the processor. It tells the computer's memory, arithmetic/logic unit and input and output devices how to respond to a program's instructions

FUNCTION'S OF A MICROPROCESSOR

1. to fetch, decode and execute instructions.
2. movement/transfer of data to and from memory location to microprocessor and vice versa
3. provide timing and control signal
4. give response to interrupts