Cut and paste this URL to share the unmodified register and value:
https://regviz.com/r/Renesas Electronics/R7FA6T1AD/IIC1/ICBRL#0x0
I2C Bus Bit Rate Low-Level Register
Bit Rate Low-Level Period (Low-level period of SCL clock)
This bit is read as 1. The write value should be 1.
These bits are read as 11. The write value should be 11.
https://github.com/cmsis-svd/cmsis-svd-data