8.4.6.8.1 Initialization Procedure

The QSPI initialization procedure must follow the specific steps below to ensure proper behavior.

Enable the GCLK clock.
Configure QSPI_REFRESH, QSPI_MR, QSPI_SCR, QSPI_SMR, etc.
Wait for QSPI_SR.SYNCBSY=0, then write QSPI_CR.UPDCFG. Wait for QSPI_SR.SYNCBSY=0.
Write QSPI_CR.QSPIEN.
Wait for QSPI_SR.QSPIENS=1.
If automatic refresh is enabled, wait for QSPI_ISR.RFRSHD=1 by polling or interrupt (see Automatic Refresh).

The online versions of the documents are provided as a courtesy. Verify all content and data in the device’s PDF documentation found on the device product page.