The recommended oscillator crystal frequency for the ST72F63BK4B1 is 4 MHz or 8 MHz, depending on the application and clock speed requirements.
The watchdog timer on the ST72F63BK4B1 can be configured using the WWDG_CR register. You need to set the WWDG_CR[7:0] bits to the desired timeout period and enable the watchdog timer by setting the WWDG_CR[8] bit.
The maximum current that can be sourced or sunk by the GPIO pins on the ST72F63BK4B1 is 20 mA, with a total current limit of 100 mA for all GPIO pins combined.
To implement a bootloader on the ST72F63BK4B1, you need to use the microcontroller's built-in bootloader mode, which can be enabled by setting the BOOT0 pin high during reset. You can then use the USART or SPI interface to upload new firmware to the microcontroller.
The minimum operating temperature range for the ST72F63BK4B1 is -40°C, and the maximum operating temperature range is 85°C.
ST72F63BK4B1 datasheet
by STMicroelectronics
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