MC9S12XD256CAA datasheet by Freescale Semiconductor

MC9S12XD256CAA Frequently Asked Questions (FAQs)

• What is the maximum operating frequency of the MC9S12XD256CAA?
  The maximum operating frequency of the MC9S12XD256CAA is 50 MHz, but it can be overclocked to 60 MHz with careful consideration of power consumption and thermal management.
• How do I configure the internal clock source?
  The internal clock source can be configured using the Clock Monitor Unit (CMU) module. The CMU module allows you to select the clock source, configure the clock frequency, and monitor the clock status.
• 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 per pin, with a total current limit of 100 mA for all GPIO pins combined.
• How do I implement a watchdog timer?
  The MC9S12XD256CAA has a built-in Computer Operating Properly (COP) module that can be used to implement a watchdog timer. The COP module can be configured to generate a reset signal if the microcontroller fails to refresh the COP timer within a specified time period.
• What is the maximum amount of flash memory that can be programmed?
  The MC9S12XD256CAA has 256 KB of flash memory, but only 248 KB is available for user programming. The remaining 8 KB is reserved for the bootloader and other system functions.