Cut and paste this URL to share the unmodified register and value:
https://regviz.com/r/stm32/stm32f7/STM32F765/ADC_Common/CCR#0x0
ADC common control register
MULTI
DELAY
DDS
DMA
ADCPRE
VBATE
TSVREFE
https://github.com/modm-io/cmsis-svd-stm32