MC68HC908QT4CPE datasheet by Freescale Semiconductor

MC68HC908QT4CPE Frequently Asked Questions (FAQs)

• What is the maximum clock frequency that can be used with this microcontroller?
  The maximum clock frequency for the MC68HC908QT4CPE is 20 MHz, but it can be overclocked to 24 MHz with some limitations.
• How do I configure the internal oscillator for the best possible accuracy?
  To configure the internal oscillator for the best possible accuracy, use the trim values provided in the datasheet and adjust them based on the specific board layout and temperature range.
• Can I use the MC68HC908QT4CPE in a 3.3V system?
  Yes, the MC68HC908QT4CPE can operate at 3.3V, but it requires some external components and adjustments to the voltage regulator circuit.
• How do I implement a watchdog timer on this microcontroller?
  The MC68HC908QT4CPE has a built-in watchdog timer that can be enabled and configured using the COP (Computer Operating Properly) register and the COPCTL register.
• What is the maximum amount of current that can be sourced or sunk by the I/O pins?
  The maximum amount of current that can be sourced or sunk by the I/O pins of the MC68HC908QT4CPE is 25 mA, but it's recommended to limit it to 10 mA for reliable operation.