Cut and paste this URL to share the unmodified register and value:
https://regviz.com/r/Atmel/AT91SAM9M11/ISI/ISI_CR#0x0
ISI Control Register
ISI Module Enable Request
ISI Module Disable Request
ISI Software Reset Request
ISI Codec Request
https://github.com/cmsis-svd/cmsis-svd-data