Question

What is the primary role of system bus? Why is data bus is bidirectional while address bus is unidirectional?

Answer 1

Answer:

Address bus is Unidirectional because the microprocessor is addressing a specific memory location. No outside devices can not write into Microprocessor. Data bus is Bidirectional because the Microprocessor can read data from memory or write data to the memory. Normally Control bus is unidirectional.

Answer 2

Answer:

The primary role of system bus is Unidirectional because the microprocessor is addressing a specific memory location.

No outside devices can not write into Microprocessor. Data bus is Bidirectional because the Microprocessor can read data from memory or write data to the memory. Normally Control bus is unidirectional.