Am 2021-03-12 12:07, schrieb Pratyush Yadav:
On 12/03/21 11:20AM, Michael Walle wrote:
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.
The algorithm supports a temperature range of -45 C to +130 C. The
temperature is checked at calibration time and adjustments are made to
make sure the reads work over the entire temperature range [0].
Ah, nice. And you need the current temperature to correlate it to the
meassured timings, right?
-michael
