Cut and paste this URL to share the unmodified register and value:
https://regviz.com/r/Keil/AT32F435xx_v2/I2C1/TIMEOUT#0x0
Timeout register
Clock timeout detection time
Clock timeout detection mode
Detect clock low/high timeout enable
Cumulative clock low extend timeout value
Cumulative clock low extend timeout enable
https://github.com/cmsis-svd/cmsis-svd-data