Cut and paste this URL to share the unmodified register and value:
https://regviz.com/r/Microchip Technology/ATSAME51J19A/SERCOM0/I2CS/CTRLB#0x0
I2CS Control B
Smart Mode Enable
PMBus Group Command
Automatic Address Acknowledge
Address Mode
Command
Acknowledge Action
https://github.com/cmsis-svd/cmsis-svd-data