Note: The calibration step is only enabled for the
first rank in a multi-rank system. This calibration stage is skipped for data rates at
or below 2,133 Mb/s. At these data rates, the data eye is wide enough that prior
calibration stages provide adequate DQS centering.
For the same reasons as described in the Read DQS Centering (Complex), a complex data pattern is used on the write path to adjust the Write DQS-to-DQ alignment. The same steps as detailed in the Write DQS-to-DQ Centering are repeated just with a complex data pattern.