Cut and paste this URL to share the unmodified register and value:
https://regviz.com/r/Keil/AT32F415xx_v2/SDIO1/CMD#0x0
SDIO command register (SDIO_CMD)
CMDIDX
WAITRESP
WAITINT
WAITPEND
CPSMEN
SDIOSuspend
https://github.com/cmsis-svd/cmsis-svd-data