Hello. We found the 1st bit of the DQ amplitude was small by DDR3 stress test (Writing mode).
And, tDS/tDQ found tight specifications (DQS or DQ - CLK).
*Refer to attached file.
How to increase the DQ amplitude?
For example, if user increase the DQ Drive strength (40 Ohm --> 34Ohm), is this issue improved?
This question is related to the following thread.