I have one question about proper use of DDR calibration method, with MPR and with pre-defined value.
In Read Calibration and Read DQS Gating Calibration, it have 2 metho, with MPR and with pre-defined value.
In what case are you supposed to use each function?
with MPR : one time after board designed to generate pre-defined value.
with pre-designed value : In product, one time in DDR initialization on power up sequence.
Is it correct?