Types of system buses

Discuss types of system buses.

Different types of system buses are as follows:

Data Bus

Data bus is the most common type of bus. It is used to transfer data between different components of computer. The number of lies in data bus affects the speed of data transfer between different components. The data bus consists of 8, 16, 32, or 64 lines. A 64- lines data bus can transfer 64 bits at one time.

The data bus lines are bi-directional. It means that:

CPU can read data from memory using these lines

CPU can write data to memory locations using these lines

Address Bus

Many components are connected to one another through buses. Each component is assigned a unique ID. This ID is called the address of that component. If a component wants to communicate with another component, it uses address bus to specify the address of that component. The address bus is a unidirectional bus. It can carry information only in one direction. It carries address of memory location from microprocessor to the main memory.

Control Bus

Control bus is used to transmit different commands or control signals from one component to another component. CPU wants to read data from main memory .It will use control bus to send the memory read command to the main memory of computer. The control bus is also used to transmit control signals like ACKS ( Acknowledgement signals)