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1.

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

Student Answer: Two Four Seven Eight Comments:

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.

Student Answer: Channel 7 Channel 2 Channel 5 Channel 3 Comments:

3. Question (TCO #6) To enable Channel 7 of the PWM to 9S12DG256, which of the


:

following must be done?

Student Answer: Set PWME7 = 1 Set PWME7 = 0 Set CAE7 = 1 Set CAE7 = 0 Comments:

4. Question : (TCO #6) What is Clock SA when PWMSCLA = 0x01 and Clock A = 4MHz? Student Answer: 5MHz 4MHz 8MHz 2MHz Comments:

5. Question : (TCO #6) What is Clock SA when PWMSCLA = 0x00 and Clock A = 8MHz? Student Answer: 8MHz 15625Hz 8MHz 31250Hz Comments:

6.

Question (TCO #6) A bus clock is set to 4000 kHz. What is the Clock A’s value if : PWMPRCLK = 0x02?

Student Answer: 1MHz 3MHz 2MHz 8MHz


Comments:

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%

Student Answer: Duty Cycle = [PWMDTYx PWMPERx] * 100% Duty Cycle = PWMDTYx 100% Both A or B (depends on PPOLx)

/

Comments:

8.

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

Student Answer:

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) Comments:

9.

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

Student Answer: is directly proportional to the amount of the current flowing inside the wire

loops wire

around

the


is strongest closer to the wire satisfies all of the above answers Comments:

10.

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

Student Answer: servo motor AC motor stepper motor None of the above

Ecet 365 week 6 quiz  

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