Cut and paste this URL to share the unmodified register and value:
https://regviz.com/r/Microchip Technology/ATSAME51J19A/SERCOM0/I2CM/ADDR#0x0
I2CM Address
Address Value
Length Enable
High Speed Mode
Ten Bit Addressing Enable
Length
https://github.com/cmsis-svd/cmsis-svd-data