# 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