Cut and paste this URL to share the unmodified register and value:
https://regviz.com/r/stm32/stm32l5/STM32L552/GTZC_TZSC/TZSC_MPCWM1_NSWMR2#0x0
TZSC external memory non-secure watermark register 1
NSWM2STRT
NSWM2LGTH
https://github.com/modm-io/cmsis-svd-stm32