About microprocessor

I am going to tell you about microprocessor.

          The microprocessors is heart of any normal computer, whether it is a desktop machine ,a server or a laptop.It is a complete  computation engine that is fabricated on a single chip. A microprocessor is also known as a CPU or Central Processing Unit . The first microprocessor  was the Intel 4004, introduced in 1971.

        Definition: The microprocessor is a semiconductor chip that implements the central processor of a computer .It require positive supply and  perform 74 bit instructions .

           

   

 Based on instructions a microprocessor can  do the following basic things:

 *Using the ALU ,it can perform arithmetic  and logical operations.

*A microprocessor can move data from one memory locations to another.

*A microprocessor can make decision and jump to a new set of instructions based on those decisions.

A microprocessor has following three buses :

1.address bus.

2.Data bus.

3.Control bus.

Address bus:An address bus can sends an address to a memory. The CPU can put a binary numbers on the address bus  to select an individual  register in the ram and ROM or I/o. 

In 8085 , address bus is 16bit wide.

Data bus: A data bus can send data to memory or receive data from memory .It is bi-directional bus.

Control bus: The control bus instruct the chips to do various things , such as when to read or write etc.

Features of microprocessor :

The important feature of microprocessor  are as follows.

*Cost: the most important feature of microprocessor is its low cost . It is a well established fact that with the advancement of technology , the cost does not increase .

*Size: The second important feature of microprocessors is its small size . It's size doesn't  a few inches  on any side  even in the package form .