Cut and paste this URL to share the unmodified register and value:
https://regviz.com/r/Silicon Labs/Series1/MGM13/MGM13S12F512GA/VDAC0/CMD#0x0
Command Register
DAC Channel 0 Enable
DAC Channel 0 Disable
DAC Channel 1 Enable
DAC Channel 1 Disable
OPA0 Enable
OPA0 Disable
OPA1 Enable
OPA1 Disable
OPA2 Enable
OPA2 Disable
https://github.com/cmsis-svd/cmsis-svd-data