We have a custom board based on i.MX6 SoloX and we are running Linux on it.
We have encounterd undocumented POR_B pin behaviour.
In particularly, NXP specifies the minimum duration of the input POR_B signal as 30.5 us (1 RTC_XTALI cycle).
However, from practical experiments (using our board), a shorter pulse (shorter than 1 us) on the POR_B input resets the processor.
We didn't find any references to the issue in the "Chip Errata for the i.MX 6SoloX" (Rev. 1, 04/2016).
Can somebody help us to know why is this so?