9.4.6.5 DQS Delay

The DQS Delay analog cell is used to delay the DQS signal in order to use it for data sampling. It is mandatory to enable the DQS Delay cell if QSPI_IFR.DQSEN is set to ‘1‘.

To enable the DQS Delay cell, set QSPI_MR.DQSDLYEN to 1. This must be done before enabling the QSPI.

Periodically, the DQS Delay cell must be calibrated. The calibration can be performed automatically or manually through a refresh. The calibration process is described in the section Refresh Sequence.