Cut and paste this URL to share the unmodified register and value:
https://regviz.com/r/stm32/stm32n6/STM32N645/JPEG/JPEG_CONFR0#0x0
START=B_0x0
JPEG codec control register
Start
0 (B_0x0): Stop/abort
1 (B_0x1): Start
https://github.com/modm-io/cmsis-svd-stm32