MC9S08PT8VTG datasheet by Freescale Semiconductor

MC9S08PT8VTG 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 20 MHz, but it's recommended to use 16 MHz or lower for optimal performance and to ensure that the device operates within its specifications.
• How do I configure the watchdog timer to reset the device in case of a fault?
  To configure the watchdog timer, you need to set the WDTCLK register to select the clock source, set the WDTCNT register to set the timeout period, and enable the watchdog timer by setting the WDTEN bit in the WDTCTL register. You can also use the watchdog timer in interrupt mode by setting the WDTS bit in the WDTCTL register.
• Can I use the analog-to-digital converter (ADC) in sleep mode?
  No, the ADC cannot be used in sleep mode. The ADC requires the system clock to be running, and sleep mode disables the system clock to reduce power consumption. You need to wake up the device and enable the ADC before taking a conversion.
• How do I implement a delay function using the timer module?
  You can implement a delay function using the timer module by setting the timer period register (TPR) to the desired delay value, enabling the timer by setting the TEN bit in the TSCR register, and then waiting for the timer overflow flag (TOF) to be set. You can also use the timer interrupt to generate an interrupt at the end of the delay period.
• What is the maximum current that can be sourced or sunk by the GPIO pins?
  The maximum current that can be sourced or sunk by the GPIO pins is 25 mA. However, it's recommended to limit the current to 10 mA or less to ensure reliable operation and to prevent overheating.