 | Digital Teaching Aid (DED Philippinen, 86 p.) |
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Answers to Evaluation Problems
First evaluation:
No. 1
|
A |
B |
C |
X | |
|
0 |
0 |
0 |
0 | |
|
0 |
0 |
1 |
1 | |
|
0 |
1 |
0 |
0 | |
|
0 |
1 |
1 |
1 |
X = A B + C |
|
1 |
0 |
0 |
0 | |
|
1 |
0 |
1 |
1 | |
|
1 |
1 |
0 |
1 | |
|
1 |
1 |
1 |
1 | |
No. 3
|
B |
|
C (A + B) |
|
|
No. 4
|
A |
B |
C |
D |
X |
|
0 |
0 |
0 |
0 |
. |
|
. |
. |
. |
. |
. |
|
. |
. |
. |
. |
. |
|
1 |
1 |
0 |
1 |
1 |
|
1 |
1 |
1 |
0 |
1 |
|
1 |
1 |
1 |
1 |
1 |
No. 5
Second evaluation:
No. 1
|
A |
B |
C |
X | |
|
0 |
0 |
0 |
0 | |
|
0 |
0 |
1 |
0 | |
|
0 |
1 |
0 |
0 | |
|
0 |
1 |
1 |
1 |
Q = AB + AC |
|
1 |
0 |
0 |
0 | |
|
1 |
0 |
1 |
1 | |
|
1 |
1 |
0 |
0 | |
|
1 |
1 |
1 |
1 | |
No. 2
| |
A |
B |
C |
T |
U |
V |
W |
X |
Y |
Z |
|
0 |
0 |
0 |
0 |
X |
X |
X |
X |
X |
X |
X |
|
1 |
0 |
0 |
1 |
0 |
0 |
0 |
1 |
0 |
0 |
0 |
|
2 |
0 |
1 |
0 |
1 |
0 |
0 |
0 |
0 |
0 |
1 |
|
3 |
0 |
1 |
1 |
1 |
0 |
0 |
1 |
0 |
0 |
1 |
|
4 |
1 |
0 |
0 |
1 |
0 |
1 |
0 |
1 |
0 |
1 |
|
5 |
1 |
0 |
1 |
1 |
0 |
1 |
1 |
1 |
0 |
1 |
|
6 |
1 |
1 |
0 |
1 |
1 |
1 |
0 |
1 |
1 |
1 |
|
7 |
1 |
1 |
1 |
x |
x |
x |
x |
x |
x |
x |
|
T = Z |
T = B + A |
V = A |
|
U = Y | | |
|
V = X |
U = AB |
W = C |
Second evaluation:
No. 3
No. 4
Third evaluation:
No. 1
|
clock |
A |
B |
C |
D |
X |
Y |
|
0 |
0 |
0 |
0 |
0 |
1 |
0 |
|
1 |
0 |
0 |
0 |
1 |
1 |
0 |
|
2 |
0 |
0 |
1 |
0 |
1 |
0 |
|
3 |
0 |
0 |
1 |
1 |
1 |
0 |
|
4 |
0 |
1 |
0 |
0 |
1 |
0 |
|
5 |
0 |
1 |
0 |
1 |
1 |
0 |
|
6 |
0 |
1 |
1 |
0 |
0 |
1 |
|
7 |
0 |
1 |
1 |
1 |
0 |
1 |
|
8 |
1 |
0 |
0 |
0 |
0 |
1 |
|
9 |
1 |
0 |
0 |
1 |
0 |
1 |
| |
Don't care conditions | | ||||
Figure
No. 2
No. 3
- Connect Vcc to 5V
- Connect GND and Strobe to ground
- Connect D5, D10, and D14 to ground
- Connect all other D inputs to 5V
No. 4
No output line is active, chip is disabled ® Strobe is high!
No. 5
-R and T ® high
-ABCD = 1001
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