STM8S903K3U3TR datasheet by STMicroelectronics

STM8S903K3U3TR Frequently Asked Questions (FAQs)

• What is the maximum clock frequency that can be used with the internal oscillator?
  The maximum clock frequency that can be used with the internal oscillator is 16 MHz, but it's recommended to use a maximum of 12 MHz to ensure stability and accuracy.
• How do I configure the watchdog timer to reset the MCU in case of a fault?
  To configure the watchdog timer, you need to set the WDP bits in the WAFR register to select the timeout period, and then enable the watchdog by setting the WDGA bit in the WAFR register. You can also use the IWDG (Independent Watchdog) instead of the WWDG (Window Watchdog) for a more flexible configuration.
• Can I use the UART in asynchronous mode with a baud rate higher than 115200 bps?
  No, the UART in asynchronous mode is limited to a maximum baud rate of 115200 bps. If you need a higher baud rate, you need to use the UART in synchronous mode or use a different communication interface like SPI or I2C.
• How do I implement a delay function using the timers?
  You can implement a delay function using the timers by configuring the timer to count up to a specific value, and then using the timer interrupt to trigger the delay. For example, you can use Timer 2 to generate a delay by setting the ARR register to the desired delay value, and then enabling the timer interrupt.
• Can I use the ADC to convert an analog signal with a frequency higher than 10 kHz?
  No, the ADC is limited to a maximum sampling frequency of 10 kHz. If you need to convert an analog signal with a higher frequency, you need to use an external ADC or a different MCU with a faster ADC.