Let me confirm the tolerance value of internal register for i.MX6DL.
From "188.8.131.52 Output driver" in reference manual.
Selectable pull-up resistors of 22K, 47K, 100K and a pull-down resistor of
100KOhm. Unsilicided P+ poly resistor is used to limit resistance variation to within ± 20%.
Answer from expert was
"The tolerance of the i.MX6 series internal pull-up/down I/O resistors is +/- 10%."
Which information is correct?