Lecture22

# Lecture22 - • Example The circuit below corresponds to a...

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ENSC150 Lecture 22 Agenda Mealy and Moore Sequential circuits 1/5 Lecture 22 Atousa Hajshirmohammadi, SFU

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Mealy Circuit When the output of a sequential circuit depends on the state as well as the input to the circuit, we use a “Mealy” state diagram. In this state diagram, the output value is written on the transition lines between states. We are familiar with this type of circuit already. Example: The state table given below corresponds to a Mealy circuit model. Draw the state diagram of the circuit. 2/5 Lecture 22 Atousa Hajshirmohammadi, SFU
Moore Circuit When the output of a sequential circuit depends only on the state the circuit, we use a “Moore” state diagram. In this case, the output value can be written inside the circles representing the states.

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Unformatted text preview: • Example: The circuit below corresponds to a Moore circuit model. Write the state table and draw the state diagram of the circuit. 3/5 Lecture 22 Atousa Hajshirmohammadi, SFU Implementation • Implementation of the Mealy and Moore models are very similar. • To practice with different ﬂip ﬂop types, let’s implement the ﬁrst circuit twice, using D and J-K ﬂip ﬂops, and the second circuit using J-K ﬂip ﬂops. 4/5 Lecture 22 Atousa Hajshirmohammadi, SFU Mixing Mealy and Moore Sometimes, part of a Mealy state diagram can be modiﬁed into a Moore model. For example, consider the Mealy example we developed earlier: 5/5 Lecture 22 Atousa Hajshirmohammadi, SFU...
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Lecture22 - • Example The circuit below corresponds to a...

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