Cut and paste this URL to share the unmodified register and value:
https://regviz.com/r/Microchip Technology/ATSAME51J19A/RSTC/RCAUSE#0x0
Reset Cause
Power On Reset
Brown Out CORE Detector Reset
Brown Out VDD Detector Reset
NVM Reset
External Reset
Watchdog Reset
System Reset Request
Backup Reset
https://github.com/cmsis-svd/cmsis-svd-data