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Buses

Computer Science: OCR A Level, topic 1.1.3

Buses

Buses are used to send and receive data and instructions from main memory (RAM).

Function

Function

  • Buses are used to send and receive data and instructions from main memory (RAM).
  • A Von Neumann CPU has 3 buses:
  • The data bus
  • The address bus
  • The control bus
Data bus

Data bus

  • The data bus retrieves data and instructions from main memory.
Address bus

Address bus

  • The address bus sends addresses to the main memory.
Control bus

Control bus

  • The control bus sends control signals to other devices inside the computer system.

Test yourself on Buses

  • Which bus retrieves data and instructions from main memory?

  • Which bus retrieves data and instructions from main memory?

  • Which bus retrieves data and instructions from main memory?

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