1. Computer Systems, Computing Higher

The Fetch Execute Cycle

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The Fetch Execute cycle (Memory read instruction)

  1. The memory address of the next instruction is placed on the address bus
  2. A read signal is activated on the read line
  3. The data stored at the memory address is placed on the data bus
  4. The processor interprets the instruction
  5. The processor executes the instruction

The Fetch Execute cycle (Memory write instruction)

  1. The required memory address is put in the Memory Address Register
  2. The value to be written is put into the Memory Data Register
  3. The control unit activates the Write Line.
  4. The contents of the Memory Data Register are transferred by the data bus to the required memory address.

2 thoughts on “The Fetch Execute Cycle”

  1. Thank you sir for.these power points.

    I have one question to ask though, what things where we going to learn today out of the book?

    I would like to read it and learn it today even though the school has been closed.

    Thank you.

    1. Thanks Cameron, I have posted some materials on the blog and I will update the school website with the other notes today.

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