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270L02Notes

# 270L02Notes - device that selects between two inputs(A and...

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A R B Cout Cin A R B Cout Cin A R B Cout Cin device that selects between two inputs (A and B in this case) depending on the value of S. have? Can we use the 2-to-1 MUX? 0 1 A B S X EECS 270, Fall 2009, Lecture 2 Page 1 of 7 EECS 270 Fall 2009 Lecture2 (9/14/09) Use pencil! Corrections, comments, etc. Last time I said that for something like A*B*C the order doesn’t matter because of the commutative property. That would be the associative property. Homework 1 is due Wednesday. The drop box is in the same room as our GSI’s office hours. Sign on the box will show up by tomorrow @noon. The class schedule had the wrong final exam time. That has been fixed. Please note that the University changed our final time a couple of weeks ago. There were also problems with the lab schedule, also fixed. Last time in the 10:30 lecture I mentioned something about MSU having the better football team. Recent evidence would seem to indicate that view to be in error. Quick review Let’s design a 3-digit prime number detector. Write the truth table, write the canonical sum-of-products and draw gates which implement the detector. Let’s have the input be N[2:0]. N 2 N 1 N 0 Prime 0 0 0 0 0 1 0 1 0 0 1 1 1 0 0 1 0 1 1 1 0 1 1 1 Prime=

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EECS 270, Fall 2009, Lecture 2 Page 2 of 7 Solving problems with logic—Computer Arithmetic (2.7, p165-169) Note: Section 2.7 covers a number of sample design problems we can solve via logic. We’re going to do a different problem than the
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270L02Notes - device that selects between two inputs(A and...

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