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Home Digital Electronics Digital System Projects Using HDL Comments

  • Question
  • VARIABLES are considered to be updated ________ within a sequence of statements in a PROCESS, whereas SIGNALS referred to in a PROCESS are updated when the PROCESS ________.


  • Options
  • A. once, starts
  • B. immediately, suspends
  • C. twice, ends
  • D. never, starts

  • Correct Answer
  • immediately, suspends 


  • Digital System Projects Using HDL problems


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    • 1. In the stepper motor, the half-step sequence is used when ________.

    • Options
    • A. less torque is needed
    • B. larger steps are desired
    • C. smaller steps are desirable
    • D. more torque is needed
    • Discuss
    • 2. In the digital clock project, when it is 11:59:59, AND gate 1 detects that the tens of hours is 1 and the enable input is active. On the next clock pulse the AM/PM flip-flop will ________.

    • Options
    • A. set
    • B. reset
    • C. toggle
    • D. clear
    • Discuss
    • 3. In the digital clock project HDL code, the MOD-12 counter is using ________.

    • Options
    • A. a BCD counter followed by a MOD-2 counter
    • B. a single HDL module
    • C. a MOD-6 counter followed by a MOD-2 counter
    • D. a MOD-12 counter followed by a D flip-flop
    • Discuss
    • 4. The major blocks of the frequency counter are the counter, ________, decoder/display, and the timing and control unit.

    • Options
    • A. signal prescaler
    • B. control inputs
    • C. signal generator
    • D. display register
    • Discuss
    • 5. The stepper motor HDL will ignore its counter inputs and pass control inputs directly to the output when set in mode ________.

    • Options
    • A. 1
    • B. 2
    • C. 3
    • D. 4
    • Discuss
    • 6. One of the first steps in small-project management is to determine ________.

    • Options
    • A. how many devices are controlled by the outputs
    • B. a way to test each block
    • C. if each block fits together
    • D. how each block works
    • Discuss
    • 7. The step rate of the simulation of a stepper motor is probably ________ the actual stepper motor.

    • Options
    • A. slower than
    • B. more than
    • C. almost the same as
    • D. exactly the same as
    • Discuss
    • 8. In the keypad encoder, the ring counter is implemented using ________ that responds to the clk input.

    • Options
    • A. SIGNAL
    • B. FUNCTION
    • C. CASE
    • D. PROCESS
    • Discuss
    • 9. The timing and control block provides the ________ for the frequency counter.

    • Options
    • A. brains
    • B. BCD counters
    • C. display register
    • D. six different frequency measurement ranges
    • Discuss
    • 10. Using one case construct inside another is known as ________.

    • Options
    • A. doping
    • B. functioning
    • C. freezing
    • D. nesting
    • Discuss


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