Need help please!!!

Discussion in 'Homework Help' started by Benbenzino, Nov 15, 2008.

  1. Benbenzino

    Thread Starter New Member

    Nov 15, 2008
    2
    0
    Can anyone help me please. i don't know where to start.
    here the design project.

    Design a simple Arithmetic Logic Unit (ALU) which has the following functional units,

    • Data operator: adds and subtracts two, 2 bit binary numbers.
    • Up-Down Counter: counts 0,1,2,3,4,0 (up) or 4,3,2,1,0,4 (down)
    • Comparator: compares two 2 bit numbers.
    • Register: 4 bit parallel-in serial out shift register.
    thanks
     
    Last edited: Nov 15, 2008
  2. thingmaker3

    Retired Moderator

    May 16, 2005
    5,072
    6
    If I were you, I would begin by reviewing the required building blocks:

    Adders
    Subtractors (just a different kind of adder)
    Digital comparators
    Counters
    and Shift Registers

    If your school's text does not cover these, or if you need these differently stated than in your text, please try here:

    http://www.allaboutcircuits.com/vol_4/chpt_9/2.html

    http://www.allaboutcircuits.com/vol_4/chpt_11/index.html

    http://www.allaboutcircuits.com/vol_4/chpt_12/index.html

    A two bit comparator can be built from a pair of XNOR gates.
     
  3. bertus

    Administrator

    Apr 5, 2008
    15,648
    2,347
  4. Benbenzino

    Thread Starter New Member

    Nov 15, 2008
    2
    0
    Thanks Guy !!! That really help.
     
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