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# 22 - “Reverse Engineering” Consider the logic circuit...

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COCO In-Class Activity 10/30/06 ECSE-2610 Computer Components & Operations, Fall 2000 Page 1 of 2 Activity 1: Getting to know Moore and Mealy Machines a. Reduce the number of states in the state diagram for the Mealy machine that describes the vending machine discussed in class (slide 11). b. Consider the second example discussed in class (a finite-state machine that asserts its single output whenever its input bit stream has two or more successive one’s). For the following input sequence, write down the output sequences for the Moore and Mealy machines discussed in class. Assume that both machines are in State 0 to begin with. Input 0 0 0 1 1 1 0 1 0 0 1 1 0 0 Next State Moore Machine Output Next State Mealy Machine Output

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COCO In-Class Activity 10/30/06 ECSE-2610 Computer Components & Operations, Fall 2000 Page 2 of 2 Activity 2: Getting to know Moore and Mealy Machines by
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Unformatted text preview: “Reverse Engineering” Consider the logic circuit shown below. D Q Q T Q Q Z I A B a. Is this a Moore machine or a Mealy Machine? Why? b. Are the flip flops negative or positive edge triggered? c. What variables are the inputs to this circuit? d. What variables are the outputs of this circuit? e. Write down the input function to the T flip flop. f. Write down the input function to the D flip flop. g. Write down the output function of this circuit. h. Derive the equation for the next state A* for the T flip flop. i. Derive the equation for the next state B* for the D flip flop. A B I A* B* Z 0 0 0 0 0 1 0 1 0 0 1 1 1 0 0 1 0 1 1 1 0 1 1 1 j. Complete the state transition table to the right, and sketch the state diagram for this machine, keeping in mind the appropriate notation for Moore and Mealy machines....
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22 - “Reverse Engineering” Consider the logic circuit...

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