ESP32 PWM Signal Generation Limitations
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Questions and Answers

What restricts the ability to set a PWM signal with a frequency of 40 MHz and a resolution of 16 bits simultaneously?

  • The duty cycle variation
  • The CPU clock speed
  • The PWM wave slicing mechanism
  • The clock source limitation (correct)

    • Why can't we generate a PWM wave faster than our clock allows?

  • Due to clock synchronization issues
  • Because of the digital-to-analog conversion process
  • Limitation imposed by the clock frequency (correct)
  • Interference from other signals

    • How does the resolution of a PWM signal relate to the CPU clock speed?

  • Resolution decreases with an increase in duty cycle
  • Resolution is proportional to the PWM frequency
  • Resolution depends on the number of slices per period
  • Resolution requires a CPU clock running at PWM_freq * 2^PWM_resolution (correct)

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