A bus connected between the CPU and the main memory that permits transfer of information between main memory and the CPU is known as

Control bus

• Control bus are various lines which have specific functions for coordinating and controlling microprocessor operations
• The control bus carries control signals partly unidirectional and partly bidirectional

Data Bus (Memory bus):

• The data bus is used to transfer data to and fro from the microprocessor and memory
• It is bi-directional

Address Bus:

• The address bus carries addresses and is a one-way bus from the microprocessor to the memory or other devices