Cut and paste this URL to share the unmodified register and value:
https://regviz.com/r/Silicon Labs/SiM3_NRND/SIM3L168_A/I2C_0/SCONFIG#0x0
SCL Signal Configuration
Data Setup Time Extension.
Data Hold Time Extension.
SCL Low Time Extension.
SCL Low Timer Bits [3:0].
https://github.com/cmsis-svd/cmsis-svd-data