The maximum clock frequency that can be used with the internal oscillator is 16 MHz.
To configure the watchdog timer to reset the microcontroller, set the WDPG bit in the WCR register to 1, and then set the WDV bit to 1 to enable the watchdog timer. The watchdog timer will then reset the microcontroller if it is not reset or disabled within the timeout period.
Yes, the UART in the STM8AF5268TAY can be used in asynchronous mode with a baud rate generator. The baud rate generator can be configured to generate a clock signal that is used to transmit and receive data.
To use the I2C interface to communicate with external devices, configure the I2C peripheral as a master or slave, and then use the I2C protocol to transmit and receive data. The I2C interface can be used to communicate with devices such as EEPROMs, sensors, and displays.
The maximum current that can be sourced or sunk by the GPIO pins is 20 mA. However, the total current sourced or sunk by all GPIO pins should not exceed 100 mA.