topic KL03 PWM set channel output low in Kinetis Microcontrollers

KL03 PWM set channel output low

stevengarfinkel — Wed, 13 Apr 2016 00:20:14 GMT

I am using the KL03s PWM outputs and I cannot determine if the channel outputs can be set low without disabling the PWM function. For example, I would like the PWM to continue running and when an interrupt occurs I would like to turn the channel output off until the next cycle starts.

Thanks

Re: KL03 PWM set channel output low

Robin_Shen — Wed, 13 Apr 2016 08:12:39 GMT

Hi Steven,

Do you mean the function like fault clearing? (for example: Automatic fault clearing)

The TPM module in KL03 doesn't support this function.

I am afraid you need select one MCU with fault inputs function. Product Selector can help you find the Kinetis with fault inputs function (PWM Types select Motor Control PWM).

If you still want to use KL03, I think you can wire-AND the output of PWM and GPIO.

For example: Clear the GPIO after rising edge detected, set the GPIO in Timer Overflow Interrupt if needed.

Best Regards,

Robin

-----------------------------------------------------------------------------------------------------------------------

Note: If this post answers your question, please click the Correct Answer button. Thank you!

-----------------------------------------------------------------------------------------------------------------------

Re: KL03 PWM set channel output low

stevengarfinkel — Fri, 15 Apr 2016 16:43:30 GMT

Thanks. The feature you suggest is similar to what I had in mind. I guess there is no register that actually represents the channel output in the KL03 family that could be reset in software.

Re: KL03 PWM set channel output low

Robin_Shen — Mon, 09 May 2016 01:35:10 GMT

Hi Steven,

You can also refer the methods in Clear PWM channel output after StopOnOverflow (KL17Z) .

Best Regards,

Robin