ecet_340-week3_homework_now_part-1

ecet_340-week3_homework_now_part-1 - Pages 323325 a 20 25...

Info icon This preview shows pages 1–3. Sign up to view the full content.

View Full Document Right Arrow Icon
Pages 323–325, problems 1–7, 10a, 20, 25, 29, 32 1. How many free-running timers do we have in the HCS12? 1 2. TCNT of the HCS12 is ____-bit. 16-bit 3. For accurate reading, the TCNT is accessed as (8-bit, 16-bit). 8-bit 4. The free-running timer supports a highest prescaler value of ______. 128 5. The free-running timer supports a lowest prescaler value of ______. 1 6. Which register holds the TOF? TFLG2 register 7. How do we enable the free-running timer? TEN D7 bit: 1 = Enable timer Setting to a high value the bit 7 of register TSCR1 10. Find the frequency and period used by the free-running timer if the crystal attached to the HCS12 has the following values: (a) XTAL = 4 MHz Cirstalfeq = 4MHz F= 4MHz/2 F= 2MHz T= 1/F T= 1/2MHz T= 0.5μs
Image of page 1

Info icon This preview has intentionally blurred sections. Sign up to view the full version.

View Full Document Right Arrow Icon
20. Assume that XTAL = 4 MHz. Find the value needed to generate a time delay of 5 ms. Use the largest prescaler possible. Prescaler = 128 N=(t x F)/128 N=((5x10^-3)x(4MHz/2))/128 N=78.125 25. Program channel 2 for Output Compare to generate a square wave of 1 kHz with 50% duty cycle.
Image of page 2
Image of page 3
This is the end of the preview. Sign up to access the rest of the document.

{[ snackBarMessage ]}

What students are saying

  • Left Quote Icon

    As a current student on this bumpy collegiate pathway, I stumbled upon Course Hero, where I can find study resources for nearly all my courses, get online help from tutors 24/7, and even share my old projects, papers, and lecture notes with other students.

    Student Picture

    Kiran Temple University Fox School of Business ‘17, Course Hero Intern

  • Left Quote Icon

    I cannot even describe how much Course Hero helped me this summer. It’s truly become something I can always rely on and help me. In the end, I was not only able to survive summer classes, but I was able to thrive thanks to Course Hero.

    Student Picture

    Dana University of Pennsylvania ‘17, Course Hero Intern

  • Left Quote Icon

    The ability to access any university’s resources through Course Hero proved invaluable in my case. I was behind on Tulane coursework and actually used UCLA’s materials to help me move forward and get everything together on time.

    Student Picture

    Jill Tulane University ‘16, Course Hero Intern