Buses

Buses:

                               A bus is an electrical path inside the computer system to transfer the data and information form one part to other part. All devices are contented together buses. It allows the CPU to communication with all devices.

                                   The capacity of a bus depends on the number of data lines in it. The amount of data that a bus can carry at one time is called bus width. For examples a bus with 32 lines can carry 32 bits or 4 bytes at a times. A bus with 64 lines can carry 64 bits or 8 bytes at a time.

                                          The speed at which data moves form one component to another component of the computer is called bus speed. It affects the overall performance of the computer. Bus clock speed is measured in units of megahertz (MHz) or millions of clock cycles per second.

                                          A computer may have three types of buses known as system bus ' backside bus and expansion bus. The system bus is part of the motherboard. It connect the processor to main memory. It is also known as front side bus (FSB). The backside bus (BSB) connect the processor to cache.

    System Buses :

                                                    The system bus is part of the motherboard. It connects the processor to main memory. Different types of system buses are as follows:

• Data Bus
• Address Bus
• Control Bus

     Data Bus:

                            Data bus is used to transfer data between different components of the computer . For examples' it transfer instructions form memory to CPU  for education. It is also transfer data between memory and the I\O during input  \  output  operations.

  Address Bus:

                                                   address bus is used to connect the CPU  with main memory to identify particular addresses in main memory. The number of lines in the address bus determines the amount of memory that can be directly addresses. A computer with a 32-bit address bus can directly address 4GB of physical memory. 

 

 Control Bus:

                                  Control bus is used to transfer different commands form one components to another component. For examples ' if CPU wants to read data form main memory ; it uses control bus to send the memory read the memory read command to the main memory of  the computer.

  

                 Expansion Bus

                     Coming soon.....