19.4. Questions and Outcomes of the Unit

Try these first

1. 1.

   What is a control signal in the context of a CPU?

   Hint

   Think about what helps in coordinating tasks inside the CPU.

2. 2.

   Define a finite state machine (FSM).

   Hint

   Remember, it involves conditions that lead to state changes.

3. 3.

   What is the primary function of control signals in a CPU?

   • To fetch data from memory
   • To execute instructions
   • To direct the operations within the CPU

   Hint

   Consider what allows the CPU to manage various tasks.

4. 4.

   True or False: A finite state machine can only transition between two states.

   • True
   • False

   Hint

   Think about how many paths an FSM can have.

5. 5.

   Create an FSM diagram for an instruction cycle involving FETCH, DECODE, and EXECUTE states. Ensure to indicate conditions for transitions.

   Hint

   Think about what confirms the completion of each step.

6. 6.

   Analyze a hypothetical scenario where a CPU wait state occurs. Discuss how this affects the instruction cycle and what signals are likely at play.

   Hint

   Consider how external factors can pause normal operations.