Cut and paste this URL to share the unmodified register and value:
https://regviz.com/r/stm32/stm32n6/STM32N645/JPEG/JPEG_HUFFENC_AC0_40#0x0
JPEG Huffman encoder AC0
Huffman code 80
Huffman length 80
Huffman code 81
Huffman length 81
https://github.com/modm-io/cmsis-svd-stm32