Cut and paste this URL to share the unmodified register and value:
https://regviz.com/r/Silicon Labs/Series0/EZR32LG/EZR32LG330F256R55/I2C0/CMD#0x0
Command Register
Send start condition
Send stop condition
Send ACK
Send NACK
Continue transmission
Abort transmission
Clear TX
Clear Pending Commands
https://github.com/cmsis-svd/cmsis-svd-data