Cut and paste this URL to share the unmodified register and value:
https://regviz.com/r/Atmel/AT91SAM9G25/PMECC/CTRL#0x0
PMECC Control Register
Reset the PMECC Module
Start a Data Phase
Start a User Mode Phase
PMECC Module Enable
PMECC Module Disable
https://github.com/cmsis-svd/cmsis-svd-data