The recommended oscillator crystal frequency for the ST72F63BH2T1 is 4 MHz or 8 MHz, depending on the application requirements and clock speed needed.
The watchdog timer on the ST72F63BH2T1 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 ST72F63BH2T1 is 20 mA, according to the datasheet. However, it's recommended to limit the current to 10 mA or less to ensure reliable operation.
You can implement a delay function using the timers on the ST72F63BH2T1 by configuring the timer to generate an interrupt at the desired delay interval. Then, use the interrupt handler to perform the desired action. For example, you can use the TIM1 timer to generate a delay by setting the TIM1_PSC register to the desired prescaler value and the TIM1_ARR register to the desired auto-reload value.
The minimum operating voltage for the ST72F63BH2T1 is 2.7 V, and the maximum operating voltage is 5.5 V, according to the datasheet.
ST72F63BH2T1 datasheet
by STMicroelectronics
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