58.6.2.1 Changing Frame Configuration in Serial Memory Mode (XIP)

Accesses in Serial Memory mode (QSPI_MR.SMM=1) are triggered by QSPI register accesses or by performing accesses in the QSPI memory space depending on the configuration of QSPI_IFR.SMRM and QSPI_IFR.TFRTYP. .

If QSPI_IFR is to be modified after the initial configuration, the procedure illustrated in the figure below must be followed to ensure no frame loss. For details, see Instruction Frame and Table 58-3.