My customer have already built a custom board with i.MX6SL and they have a problem with SD boot.
Some of the board fail first boot but it can boot after second time.
They tried following things.
1.It can boot normally when they turn on the power with pressing the reset button
2.It can boot normally when they press the reset button after boot fail
Form the above, they guess it have some problem with reset and clock timing.
So they check the timing of POR_B and XTAL. (Please see a following picture.)
From the pictures, it seems that is has no problem with the timings.
Then, they checked the SD clock output to confirm the point of where the i.MX is stopped.
As a result, they confirm that the SD clock wasn't output.
From the results of the investigation, we guess that ERR007927 may cause this issue.
Is there a way to confirm that this errata is caused the issue ?
And do you have any idea to avoid this issue ?