Learn > National 5 Computing Science > Computer Systems > Computer Structure > Address Bus

Address Bus

The Address Bus tells memory (RAM) which location is being used.

It works by:

  • ✅ Telling memory which location to read from.

  • ✅ Telling memory which location to write to.

  • ✅ Being uni-directional, because addresses only travel from the processor to memory.

This means the processor controls where data is stored or retrieved in memory.

National 5 Target

You should be able to describe the role of the Address Bus and explain why it is uni-directional.

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