Thanks for the resources link.
Can you please confirm the function of pin "R15",of iMX6ULL.
Q1: Is it assigned to power "VDD_HIGH_CAP" or any other pins.
Please find the image on Pg126 of IMX6ULL (Industrial grade) with R15 mentioned as "VDD_HIGH_CAP2".

At page 115 of the datasheet,R15 is not assigned to any of the pins.

Thanks,
Uma