Note: For data rates below 1,600 Mb/s,
these calibration stages are skipped.
Write DQS to DQ calibration is required
to center align the write DQS in the write DQ window per bit. At the start of Write DQS
Centering and Per-Bit Deskew, DQS is aligned to CK but no adjustments on the write
window have been made. Write window adjustments occur sequentially, as follows:- Write Per-Bit Deskew
- Write DQS Centering