Question

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

Answer 1

Address bus is Unidirectional because microprocessor is addressing a specific memory location. No outside devices cannot 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.

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