MC9S12XD256CAL datasheet by Freescale Semiconductor

MC9S12XD256CAL Frequently Asked Questions (FAQs)

• What is the maximum operating frequency of the MC9S12XD256CAL?
  The maximum operating frequency of the MC9S12XD256CAL is 25 MHz, but it can be overclocked to 30 MHz with careful consideration of power consumption and thermal management.
• How do I configure the internal clock oscillator?
  The internal clock oscillator can be configured using the CLKSEL register. The oscillator frequency can be set to 4 MHz, 8 MHz, or 16 MHz, and the clock source can be selected as either the internal oscillator or an external clock source.
• 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 use the built-in CAN module?
  The built-in CAN module can be configured using the CANCTL and CANBTR registers. The module supports both standard and extended CAN frames, and can operate at speeds up to 1 Mbps.
• What is the purpose of the VREG pin?
  The VREG pin is used to connect an external voltage regulator to the microcontroller. This pin is used to regulate the internal voltage supply and ensure that the microcontroller operates within its specified voltage range.