Cut and paste this URL to share the unmodified register and value:
https://regviz.com/r/Atmel/AT91SAM9G20/PMC/CKGR_MOR#0x0
Main Oscillator Register
Main Oscillator Enable
Oscillator Bypass
Main Oscillator Start-up Time
https://github.com/cmsis-svd/cmsis-svd-data