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Digital Electronics
‣
Digital System Projects Using HDL
Comments
Question
In an HDL application of a stepper motor, after an up/down counter is built what is done next?
Options
A. Build the sequencer
B. Test it on a simulator
C. Test the decoder
D. Design an intermediate integer variable
Correct Answer
Test it on a simulator
Digital System Projects Using HDL problems
Search Results
1. In the digital clock project, what type of counter is used to count to 59 seconds?
Options
A. MOD-60
B. MOD-6
C. BCD
D. BCD followed by a MOD-6
Show Answer
Scratch Pad
Discuss
Correct Answer: BCD followed by a MOD-6
2. In a full-step sequence involving two flip-flops driving four coils of a stepper motor, how far will the stepper motor step?
Options
A. 90°
B. 45°
C. 30°
D. 15°
Show Answer
Scratch Pad
Discuss
Correct Answer: 15°
3. What are two ways to remember the current state of a counter in VHDL?
Options
A. With FUNCTIONS and PROCESS
B. With counters and timers
C. With SIGNAL and VARIABLE
D. With bit types
Show Answer
Scratch Pad
Discuss
Correct Answer: With SIGNAL and VARIABLE
4. Which is not a step that should be followed in project management?
Options
A. Overall definition
B. System documentation
C. Synthesis and testing
D. System integration
Show Answer
Scratch Pad
Discuss
Correct Answer: System documentation
5. In the keypad application, what does the preset state of the ring counter define?
Options
A. The proper output of the column encoder
B. The NANDing of the rows
C. The NANDing of the columns
D. The proper output of the row encoder
Show Answer
Scratch Pad
Discuss
Correct Answer: The proper output of the row encoder
6. What does the ring counter in the HDL keypad application do when a key is pressed?
Options
A. Count to find the row
B. Freeze
C. Count to find the column
D. Start the D flip-flop
Show Answer
Scratch Pad
Discuss
Correct Answer: Freeze
7. What must a stepper motor HDL application include?
Options
A. Variables and processes
B. Types and bits
C. Counters and decoders
D. Sequencers and multiplexers
Show Answer
Scratch Pad
Discuss
Correct Answer: Counters and decoders
8. In the keypad application, what does the data signal define?
Options
A. The row and column encoded data
B. The ring encoded data
C. The freeze locator data
D. The ring counter data
Show Answer
Scratch Pad
Discuss
Correct Answer: The row and column encoded data
9. When designing an HDL digital system, which is the worst mistake one can make?
Options
A. Concluding that a fundamental block works perfectly
B. Failing to provide proper documentation
C. Adding blocks of code prior to testing them
D. Overlooking a possible VARIABLE
Show Answer
Scratch Pad
Discuss
Correct Answer: Concluding that a fundamental block works perfectly
10. In the keypad application, when all columns are HIGH, the ring counter is enabled and counting, and
dav
is LOW, what is the status of the
d
outputs?
Options
A. On
B. Off
C. Hi-Z
D. 1011
Show Answer
Scratch Pad
Discuss
Correct Answer: Hi-Z
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