Cut and paste this URL to share the unmodified register and value:
https://regviz.com/r/STMicroelectronics/STM32F21x/HASH/CR#0x0
control register
Initialize message digest calculation
DMA enable
Data type selection
Mode selection
Algorithm selection
Number of words already pushed
DIN not empty
Long key selection
https://github.com/cmsis-svd/cmsis-svd-data