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ZQ calibration on i.MX53

Question asked by JACK THIESEN on May 18, 2015
Latest reply on May 20, 2015 by JACK THIESEN



In application note AN4466, it states that the following calibration sequences needs to be run when bring up a board.

• ZQ calibration

• Write leveling calibration

• DQS gating calibration

• Read data DQS calibration

• Write data DQS calibration


We have the DDR3 stress test tool and have applied it to our current i.MX53 design.  When we run the calibration test we see that we get strobe, read, and write delays.  The question we have is does the DDR stress test tool run the ZQ calibration and the write leveling when it runs the calibration routine or do we have to this separately?