INTRODUCTION TO SYSTEM BUS

INTRODUCTION TO SYSTEM BUS

A Computer system consists of different  devices.CPU must be able to communicate with all devices.The devices are connected together by a communcation channel called bus.A bus consists of a set of communication lines or wires .It is used to move a large amount of bits in the form of electrical pulses from one unit to another

The bus is used to connect the following units

  Central Processing Unit

             Control Unit

              Arithmetic and Logic Unit

   Main Memory(RAM,ROM)

   Input /Output Devices

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Bus is a Common path to transfer data and commands between CPU ,memory and input/output devices

It is also used to send or recieve data from secondary storage devices.The Capacity of a bus depends on the number of lines in it.A bus with 16 lines can carry 16 bits or 2 bytes at a time.A bus with 32 lines can carry 32 bits or 4 bytes at a time.system buses are part of motherboard

Different types of system buses are as follows

        Data bus

       Address bus

        Control bus