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Unformatted text preview: Due: 10/12/2009 ECE 271, Homework #2 Instructor: Matt Shuman Safe Specifications: Buttons A, B, and C are active high Button D is active low and is hidden on the bottom of the safe. It is pushed when the safe is sitting on a flat surface. The door lock is active low ( 0 = unlocked) The speaker driver is active high ( 1 = annoying sounds ) Task: Design combinational logic to unlock the door and turn on the speaker when the blue, green, and hidden buttons are pushed. 1. Write out the truth table for the combinational logic. 2. Write out the or canonical expression for Z. 3. Write out the or canonical expression for Y. 4. Draw the gates needed to implement the design....
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This note was uploaded on 10/19/2010 for the course CS 161 taught by Professor Wallace during the Fall '08 term at Oregon State.
- Fall '08