Cut and paste this URL to share the unmodified register and value:
https://regviz.com/r/STMicroelectronics/STM32U599/OCTOSPI1/DCR1#0x0
device configuration register 1
Mode 0 / mode 3
Free running clock
Delay block bypass
Chip-select high time
Device size
Memory type
https://github.com/cmsis-svd/cmsis-svd-data