Cut and paste this URL to share the unmodified register and value:
https://regviz.com/r/STMicroelectronics/STM32F7x8/TIM1/AF1#0x0
alternate function option register 1
BRK BKIN input enable
BRK DFSDM_BREAK[0] enable
BRK BKIN input polarity
https://github.com/cmsis-svd/cmsis-svd-data