Engin112-F07-L27-seq-design

Engin112-F07-L27-seq-design - Engin112 Lectures 27...

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1 Maciej Ciesielski Department of Electrical and Computer Engineering 11/07/2007 Engin112 – Lectures 27 Sequential Circuit Design 11/07/2007 Engin 112 - Intro to ECE 2 Recap from last lecture ± Sequential circuit analysis y State equations y State table y State diagram ± Today’s lecture y Finite state machines (FSM) » Mealy » Moore y Sequential circuit design procedure
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2 11/07/2007 Engin 112 - Intro to ECE 3 Finite State Machines ± State diagrams are representations of Finite State Machines (FSM) y Two flavors of FSMs: » Mealy FSM » Moore FSM ± Difference: y How output is determined ± Mealy FSM y Output depends on input and state y Output is not synchronized with clock » can have temporarily unstable output ± Moore FSM y Output depends only on state Mealy FSM Moore FSM 11/07/2007 Engin 112 - Intro to ECE 4 Two Flavors of FSM ± Mealy vs Moore machine
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3 11/07/2007 Engin 112 - Intro to ECE 5 Mealy Machine ± Output based on state and present input y Output changes during transition s1 s2 in/out 11/07/2007 Engin 112 - Intro to ECE 6 Moore Machine ± Output based on state only y Output is associated with state S2/ out2 in s1/ out1
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4 11/07/2007 Engin 112 - Intro to ECE 7 Design of Sequential Circuits ± How can we design a sequential circuit? y
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This note was uploaded on 04/16/2008 for the course ENGIN 112 taught by Professor Ciesielski during the Spring '08 term at UMass (Amherst).

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Engin112-F07-L27-seq-design - Engin112 Lectures 27...

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