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How to use properly DDR3 calibration method of MPR and pre-defined value.

Question asked by Takayuki Ishii on Jul 27, 2017
Latest reply on Aug 1, 2017 by Takayuki Ishii



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?


Best regards,