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ECET 365 DeVry Week 6 Quiz

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ECET 365 DeVry Week 6 Quiz

ECET365

ECET 365 DeVry Week 6 Quiz

1. Question : (TCO #6) How many 16-bit PWM channels are available in the Freescale 9S12DG256 microcontroller?

  • Two
  • Four
  • Seven
  • Eight

2. Question : (TCO #6) When concatenating the two 8-bit PWM Channels 3 and 2 to get a 16-bit PWM channel, _____ becomes the low-order byte.

  • Channel 7
  • Channel 2
  • Channel 5
  • Channel 3

3. Question : (TCO #6) To enable Channel 7 of the PWM to 9S12DG256, which of the following must be done?

  • Set PWME7 = 1
  • Set PWME7 = 0
  • Set CAE7 = 1
  • Set CAE7 = 0

4. Question : (TCO #6) What is Clock SA when PWMSCLA = 0×01 and Clock A = 4MHz?

  • 5MHz
  • 4MHz
  • 8MHz
  • 2MHz

5. Question : (TCO #6) What is Clock SA when PWMSCLA = 0×00 and Clock A = 8MHz?

  • 8MHz
  • 15625Hz
  • 8MHz
  • 31250Hz

6. Question : (TCO #6) A bus clock is set to 4000 kHz. What is the Clock A’s value if PWMPRCLK = 0×02?

  • 1MHz
  • 3MHz
  • 2MHz
  • 8MHz

7. Question : (TCO #6) In case of center-aligned PWM, which formula can be used for the duty cycle of the output waveform?

  • Duty Cycle = [(PWMPERx – PWMDTYx) / PWMPERx] * 100%
  • Duty Cycle = [PWMDTYx / PWMPERx] * 100%
  • Duty Cycle = PWMDTYx 100%
  • Both A or B (depends on PPOLx)

8. Question : (TCO #6) In case of center-aligned PWM, which formula can be used for the PWM frequency?

  • PWMx frequency = Clock (A, B, SA, or SB) / PWMPERx
  • PWMx frequency = Clock (A, B, SA, or SB) / (2 * PWMPERx)
  • PWMx frequency = Clock (A, B, SA, or SB) / (4 * PWMPERx)
  • PWMx frequency = Clock (A, B, SA, or SB) / (3 * PWMPERx)

9. Question : (TCO #6) Current passing through a wire creates an electromagnetic field that _____.

  • loops around the wire
  • is directly proportional to the amount of the current flowing inside the wire
  • is strongest closer to the wire
  • satisfies all of the above answers

10. Question : (TCO #6) PWM channels of a microcontroller are designed for control of a _____.

  • servo motor
  • AC motor
  • stepper motor
  • None of the above