Cut and paste this URL to share the unmodified register and value:
https://regviz.com/r/Keil/AT32F405xx_v2/QSPI1/XIP_CMD_W0#0x0
XIP command word 0
XIP read second dummy cycle
XIP read operate mode
XIP read address length
XIP read instruction code
https://github.com/cmsis-svd/cmsis-svd-data