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Home Digital Electronics Digital System Projects Using HDL Comments

  • Question
  • In the keypad encoder, just after the 4 ms mark, the simulation initiates the release of the key by changing the column value to ________, which causes the d output to go into its Hi-Z state.


  • Options
  • A. 0 hex
  • B. 4 hex
  • C. 8 hex
  • D. F hex

  • Correct Answer
  • F hex 


  • Digital System Projects Using HDL problems


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    • 1. The interface of the stepper motor needs to operate in one of ________ mode(s).

    • Options
    • A. one
    • B. two
    • C. three
    • D. four
    • Discuss
    • 2. A very critical dimension in project management is ________.

    • Options
    • A. cost
    • B. skill
    • C. time
    • D. personnel
    • Discuss
    • 3. In the keypad encoder, the ________ activate(s) the freeze bit only when one column is low.

    • Options
    • A. NAND columns
    • B. CASE structure
    • C. freeze function
    • D. BCD counter
    • Discuss
    • 4. In the digital clock project, the 60 Hz signal is sent through a Schmitt-trigger circuit to produce square pulses at the rate of ________.

    • Options
    • A. 1 pps
    • B. 60 pps
    • C. 100 pps
    • D. 600 pps
    • Discuss
    • 5. Using one case construct inside another is known as ________.

    • Options
    • A. doping
    • B. functioning
    • C. freezing
    • D. nesting
    • Discuss
    • 6. In the digital clock design, the hours section is different from the seconds and minutes section in that it never goes to ________.

    • Options
    • A. the 0 state
    • B. 13
    • C. the ring counter
    • D. the BCD counter
    • Discuss
    • 7. One aspect of project planning and management is the selection of ________ that will best fit the application.

    • Options
    • A. hardware platform
    • B. software
    • C. personnel
    • D. time
    • Discuss
    • 8. In the digital clock project, the 1 pps signal is used as a synchronous clock for all of the counter stages, which are ________.

    • Options
    • A. advanced BCD counters
    • B. MOD-6 counters
    • C. synchronous cascaded
    • D. 1 pulse per second
    • Discuss
    • 9. Each ________, starting at the simplest level, should be built in HDL.

    • Options
    • A. subsystem
    • B. block
    • C. circuit
    • D. function
    • Discuss
    • 10. In the frequency counter, the control clock is derived from the ________ by frequency dividers controlled in the control and timing block.

    • Options
    • A. BCD counters
    • B. system clock signal
    • C. display register
    • D. decoder/display
    • Discuss


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