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I.MX RT1050 PWM waveform accuracy is not correct

Question asked by S.z. Liang Employee on May 11, 2019
Latest reply on May 13, 2019 by jeremyzhou

My customer tried to generate some PWM outputs working on the i.MX RT1050. But the PWM waveform accuracy is not correct. I reproduced this issue with  i.MX RT1050 EVKB, using demo code $\boards\evkbimxrt1050\driver_examples\qtmr\inputcapture_outputpwm in SDK. It should probe a 50Khz PWM signal output with 50% dutycycle. The oscilloscope shows the PWM output  at pin J23-5 accuracy was about 49.7K.

 

 

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