Bus Interconnection
A computer system consists of different devices such as CPU, main
memory and I/O devices. These devices are connected to an internal
communication channel of the computer system to transfer data between these devices.
The internal communication channel of the computer system is called bus
interconnection.
Computer Bus
A bus consists of a set of parallel lines. It is used to transfer
data between different components of the computer. Once line of bus can
transfer one bit at a time.
The capacity if computer bus depends on the number of data lines in
it. A bus with 16 lines can carry 16 bits or 2 bytes of data at a time. A bus
with 32 lines can carry 32 bits or 4 bytes of data at a time. The amount of
data that a bus can be carry at one time is called bus width.
Types of Buses
Different types of buses are as follows:
- System Buses
System bus is
used to connect the main components of computer such as CPU and main memory
.System buses are part of motherboard. Computers normally have system bus of 70
-100 lines
- Expansion Buses
Expansion bus
is used to connect CPU with peripheral devices such as mouse, keyboard printer,
modem and scanner etc.
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