MC9S08DZ128CLF datasheet by Freescale Semiconductor

MC9S08DZ128CLF 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 WDT_CVAL register to the desired timeout value, enable the watchdog timer by setting the WDT_EN bit in the WDT_CS1 register, and then periodically refresh the watchdog timer by writing a new value to the WDT_CVAL register before the timeout expires.
• Can I use the USB module in device mode and host mode simultaneously?
  No, the USB module on the MC9S08DZ128CLF can only operate in either device mode or host mode, but not both simultaneously. You need to configure the USB module for the desired mode using the USB_CTRL register.
• How do I implement a low-power mode to reduce power consumption?
  The MC9S08DZ128CLF has several low-power modes, including Stop, Wait, and VLPR (Very Low Power Run). To implement a low-power mode, you need to configure the PMCR (Power Management Control Register) and the LPMCR (Low Power Mode Control Register) registers, and then execute the appropriate instruction to enter the desired low-power mode.
• What is the maximum amount of current that can be sourced or sunk by the GPIO pins?
  The maximum amount of current that can be sourced or sunk by the GPIO pins on the MC9S08DZ128CLF is 25 mA per pin, with a total current limit of 100 mA for all GPIO pins combined.