Cut and paste this URL to share the unmodified register and value:
https://regviz.com/r/STMicroelectronics/STM32U5Fx/JPEG/JPEG_HUFFSYMB3#0x0
JPEG Huffman symbol
Data 12 Huffman symbol.
Data 13 Huffman symbol.
Data 14 Huffman symbol.
Data 15 Huffman symbol.
https://github.com/cmsis-svd/cmsis-svd-data