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i.MX6Q ONOFF debounce not 750ms

Question asked by Don Freiling on Mar 4, 2016
Latest reply on Mar 8, 2016 by Don Freiling

The IMX6DQRM states that PMIC_ON_REQ will be asserted if the ONOFF input is held low for a debounce duration of 750ms. On our custom board I am seeing a debounce time of only 76 micro seconds. 76us is not a reasonable duration for mechanical debouce, it should be at least 20ms. I've attached a scope trace showing ONOFF and PMIC_ON_REQ.

Questions:

1) Which clock is used to measure the ONOFF debounce time?

2) Is this an error in the RM or is it an indication of clock problem in our design?

 

Regards,

Don

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