Cut and paste this URL to share the unmodified register and value:
https://regviz.com/r/stm32/stm32h7rs/STM32H7R/JPEG/JPEG_HUFFBASE15#0x0
JPEG Huffman base
Data 30 Base Huffman value.
Data 31 Base Huffman value.
https://github.com/modm-io/cmsis-svd-stm32