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 2to1 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 3digit prime number detector.
Write the truth table, write the
canonical
sumofproducts
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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View Full DocumentEECS 270, Fall 2009, Lecture 2
Page
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Solving problems with logic—Computer Arithmetic (2.7,
p165169)
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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 Spring '11
 david
 Binary numeral system, Binarycoded decimal, Logical connective

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