18.2.2. Finite State Machine and Signal Generation

Try these first

1. 1.

   What is a finite state machine?

   Hint

   Think of states and transitions in computational processes.

2. 2.

   What does a control step counter do?

   Hint

   Consider how a clock helps keep track of time.

3. 3.

   What is the role of a finite state machine in control unit design?

   • Execution of programs
   • Generating control signals
   • Memory allocation

   Hint

   Think about what directs the CPU's actions.

4. 4.

   True or False: Hardwired control units are more flexible than microprogrammed control units.

   • True
   • False

   Hint

   Reflect on the definitions of both types.

5. 5.

   Design a finite state machine for a simple vending machine operation, identifying states and transitions that indicate how coins are processed and how items are dispensed.

   Hint

   Consider how cash flow affects the operations.

6. 6.

   Evaluate a proposed hardwired control unit's architecture for a new CPU design. What essential signals would need to be generated, and how could the design accommodate future instruction sets?

   Hint

   Outline the operational flow and how each signal supports the architecture.