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Problems with "Fault Glitch Stretch Enable"

Question asked by Jan Sundvall on Jun 9, 2015
Latest reply on Jun 10, 2015 by xiangjun.rong

Hi there


I am using the MC56F82748 DSC for a PM motor controller.


In this relation I have tried to apply HW filtering of a Fault input. More specifically, I try to apply the "Fault Glitch Stretch Enable" functionality in the register PWMA_FFILTn, however it does not seem to work.


Shortly described, my problem is that no matter, how many samples I apply or which sample rate, the delay applied by the DSC between a signal at the input and PWM inhibit does not change and stays close to zero. It seems like, a change in input voltage bypasses the filter and inhibits the PWM right away, regardless of the delay defined in the register.


Does anyone have experience using the glitch filter?