Note: These calibration stages are skipped
for data rates below 1,600 Mb/s.
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 are made in the following two sequential
stages:- Write Per-Bit Deskew
- Write DQS Centering