Where to find the GPIO Pin default registers' settings whe using Mbed I/O interface for ST NUCLEO F103RB?

Hi, I am using Mbed Studio + NUCLEO F103RB board.
The Mbed I/O APIs are easy to use.
However, I cannot find what are the GPIO Pin default registers’ settings there.
Such as for those Mbed I/O interfaces: DigitalIn, DigitalOut, AnalogIn, et., what Pin registers settings (pin speed, input pull up/pull down, pull-push/open drain, ADC bit resolution, sampling time, left/right justified, etc. ) are used by Mbed?
Or are they from which json file, HAL library file, header file ?

Thanks a lot


probably in brand/family/MCU specific implementation - mbed-os/targets/TARGET_STM at master · ARMmbed/mbed-os (github.com)
Some rules are defined as an expected behavior for corresponding peripheral - Port process overview - Porting | Mbed OS 6 Documentation

BR, Jan