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.
