MC9S12XS64CAE datasheet by Freescale Semiconductor

MC9S12XS64CAE 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 24 MHz.
• How do I configure the chip select signals for the external memory interface?
  The chip select signals can be configured using the MEMCTL register. The MEMCTL register allows you to select the memory type, memory size, and chip select polarity.
• 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 is 25 mA.
• How do I use the watchdog timer to reset the microcontroller?
  The watchdog timer can be used to reset the microcontroller by enabling the watchdog timer and setting the timeout period using the WDTCSR register. If the watchdog timer is not reset within the timeout period, the microcontroller will reset.
• What is the purpose of the COP (Computer Operating Properly) timer?
  The COP timer is a timer that resets the microcontroller if it is not periodically reset by the software. It is used to ensure that the software is operating properly and to prevent the microcontroller from getting stuck in an infinite loop.