Cut and paste this URL to share the unmodified register and value:
https://regviz.com/r/Silicon Labs/SiM3_NRND/SIM3L166_C/I2C_0/SCONFIG#0x0
SCL Signal Configuration
Data Setup Time Extension.
Data Hold Time Extension.
SCL Low Time.
SCL Low Timeout Bits [3:0].
https://github.com/cmsis-svd/cmsis-svd-data