6.2. Objective of the Module

Try these first

1. 1.

   What are control signals and why are they important?

   Hint

   Think about what happens when the CPU needs to perform a specific operation.

2. 2.

   List the three phases of the instruction cycle.

   Hint

   Consider the sequence in which the CPU processes an instruction.

3. 3.

   Which of the following best describes control signals?

   • Signals that manage CPU cache operations
   • Signals that control data flow within the CPU
   • Signals for user interface
   • None of the above

   Hint

   Focus on what role these signals play in the CPU.

4. 4.

   True or False: Micro operations are larger operations defined by macro instructions.

   • True
   • False

   Hint

   Consider how complex tasks can be split into simpler components.

5. 5.

   Develop a sequence of control signals for a 'SUB A, B' instruction in a microprogrammed control unit. Explain each command in your sequence.

   Hint

   Break down the instruction into smaller actions sequentially.

6. 6.

   Critically evaluate how the choice between a hardwired control unit and a microprogrammed control unit might affect a new instruction set in a different architecture.

   Hint

   Consider flexibility and adaptability based on design characteristics.