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State diagram for reversible mod-4-counter

  1. Oct 9, 2011 #1
    1. Draw a state diagram for a reversible mod‐4‐counter with the following in signals.
    00=stand still in the current statement
    10=count up.
    01=count down.
    :


    2. The attempt at a solution
    My first problem is that I'm a bit confused about what "reversible mod-4-counter" means.
    Do they mean reversible because you can count both up and down or do they mean something else?

    this is my attempt.
    http://img4.imageshack.us/img4/3800/20111009002.th.jpg [Broken]
     
    Last edited by a moderator: May 5, 2017
  2. jcsd
  3. Oct 9, 2011 #2

    lewando

    User Avatar
    Gold Member

    Reversible means up/down counter. Looks like you got it right.
     
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