Am 2021-03-12 11:10, schrieb Pratyush Yadav:

There is usually a delay from when the flash drives the data line (IOW,
puts a data bit on it) and when the signal reaches the controller. This
delay can vary by the flash, board, silicon characteristics,
temperature, etc.

Temperature might change over time, but the calibration is only done
once. I don't know how much influence the temperature actually has, but
our boards are usually operating from -40°C to +85°C. So there might be
a possible temperature difference of 125K between actual calibration and
when the flash is accessed.

-michael