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Counters
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Question
The hexadecimal equivalent of 15,536 is ________.
Options
A. 3CB0
B. 3C66
C. 63C0
D. 6300
Correct Answer
3CB0
Counters problems
Search Results
1. List the state of each output pin of a 7447 if
RBI
= 0,
LT
= 1,
A
0
= 1,
A
1
= 0,
A
2
= 0, and
A
3
= 1.
Options
A.
RBO
= 0,
a
= 0,
b
= 0,
c
= 0,
d
= 1,
e
= 1,
f
= 0,
g
= 0
B.
RBO
= 1,
a
= 0,
b
= 0,
c
= 0,
d
= 1,
e
= 1,
f
= 0,
g
= 0
C.
RBO
= 0,
a
= 0,
b
= 0,
c
= 0,
d
= 0,
e
= 1,
f
= 0,
g
= 0
D.
RBO
= 1,
a
= 0,
b
= 0,
c
= 0,
d
= 0,
e
= 1,
f
= 0,
g
= 0
Show Answer
Scratch Pad
Discuss
Correct Answer:
RBO
= 0,
a
= 0,
b
= 0,
c
= 0,
d
= 1,
e
= 1,
f
= 0,
g
= 0
2. What is the difference between a 7490 and a 7492?
Options
A. 7490 is a MOD-12, 7492 is a MOD-10
B. 7490 is a MOD-12, 7492 is a MOD-16
C. 7490 is a MOD-16, 7492 is a MOD-10
D. 7490 is a MOD-10, 7492 is a MOD-12
Show Answer
Scratch Pad
Discuss
Correct Answer: 7490 is a MOD-10, 7492 is a MOD-12
3. Which is not an Altera primitive port identifier?
Options
A. clk
B. ena
C. clr
D. prn
Show Answer
Scratch Pad
Discuss
Correct Answer: clr
4. The toggle condition in a master-slave
J-K
flip-flop means that
Q
and
will switch to their ________ state(s) at the ________.
Options
A. opposite, active clock edge
B. inverted, positive clock edge
C. quiescent, negative clock edge
D. reset, synchronous clock edge
Show Answer
Scratch Pad
Discuss
Correct Answer: opposite, active clock edge
5. The output of a gated
S-R
flip-flop changes only if the:
Options
A. flip-flop is set
B. control input data has changed
C. flip-flop is reset
D. input data has no change
Show Answer
Scratch Pad
Discuss
Correct Answer: control input data has changed
6. Referring to the given figure, at which point is the serial data transferred to the parallel output?
Options
A. W
B. X
C. Y
D. Z
Show Answer
Scratch Pad
Discuss
Correct Answer: Z
7. Three cascaded decade counters will divide the input frequency by ________.
Options
A. 10
B. 20
C. 100
D. 1,000
Show Answer
Scratch Pad
Discuss
Correct Answer: 1,000
8. The terminal count of a 3-bit binary counter in the DOWN mode is ________.
Options
A. 000
B. 111
C. 101
D. 010
Show Answer
Scratch Pad
Discuss
Correct Answer: 000
9. For a one-shot application, how can HDL code be used to make a circuit respond once to each positive transition on its trigger input?
Options
A. By using a counter
B. By using an active clock
C. By using an immediate reload
D. By using edge trapping
Show Answer
Scratch Pad
Discuss
Correct Answer: By using edge trapping
10. One of the major drawbacks to the use of asynchronous counters is:
Options
A. low-frequency applications are limited because of internal propagation delays
B. high-frequency applications are limited because of internal propagation delays
C. asynchronous counters do not have major drawbacks and are suitable for use in high- and low-frequency counting applications
D. asynchronous counters do not have propagation delays and this limits their use in high-frequency applications
Show Answer
Scratch Pad
Discuss
Correct Answer: high-frequency applications are limited because of internal propagation delays
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