Lec10PWM - Lecture 10 Pulse-Width Modulator(PWM Background...

Info icon This preview shows pages 1–4. Sign up to view the full content.

View Full Document Right Arrow Icon
ECE 471 10-Int-1 Lecture 10. Pulse-Width Modulator (PWM) Background 68HC12 PWM module features PWM configuration
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
ECE 471 10-Int-2 Pulse-Width-Modulation Background Information Background Information Concept of PWM Duty cycle Frequency Application Replace analog to digital conversion Motor control Light dimming
Image of page 2
ECE 471 10-Int-3 68HC12 PWM PWM subsystem provides four independent 8-bit PWM waveforms or two 16-bit PWM waveforms or A combination of one 16-bit and two 8-bit PWM waveforms. Each waveform channel has a programmable period and a programmable duty cycle as well as a dedicated counter. A flexible clock select scheme allows four different clock sources to be used with the counters. Each of the modulators can create independent, continuous waveforms with software-selectable duty rates from 0 percent to 100 percent. The PWM outputs can be programmed as left-aligned outputs or center-aligned outputs. See Figure 11-1 , Figure 11-2 , and Figure 11-3 .
Image of page 3

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

View Full Document Right Arrow Icon
Image of page 4
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