BUS

What is computer bus? What are the types of a computer buses?

System bus or Buses:

Data is normally transferred between main storage and the processor along a device called a bus which is effectively a means of sending multiple bits of data in parallel. This also called the system bus. For example, all the bits of a word may be transferred in parallel in a single operation.

  

The micro computer has three local buses. These are

• Address bus;
• Data bus;
• Control bus.

                       These three makes the system bus.

                                                 

Address bus:

It is unidirectional, information flows over it only in one direction, from the CPU to the memory or I/O devices.

Data bus:

It is bidirectional and data can flow to and from the CPU through it.

Control bus:

It consists of a set of signals that is used to synchronize the activities of separate microcomputer elements.