MC9S12XA512VAA datasheet by Freescale Semiconductor

MC9S12XA512VAA Frequently Asked Questions (FAQs)

• What is the maximum clock frequency of the MC9S12XA512VAA?
  The maximum clock frequency of the MC9S12XA512VAA is 50 MHz.
• How do I configure the internal clock oscillator?
  The internal clock oscillator can be configured using the SYNR and REFSYN registers. Refer to the datasheet section 10.3.1 for more information.
• What is the purpose of the COP (Computer Operating Properly) timer?
  The COP timer is a watchdog timer that resets the microcontroller if it does not receive a refresh signal within a specified time period, ensuring that the system remains operational.
• How do I use the SCI (Serial Communication Interface) module?
  The SCI module can be used for asynchronous serial communication. Configure the SCI registers (SCIBDH, SCIBDL, SCIC1, SCIC2) to set the baud rate, data bits, and stop bits. Enable the transmitter and receiver using the SCIC1 register.
• What is the difference between the XGATE and the COP watchdog timers?
  The XGATE timer is a general-purpose timer that can be used for various applications, whereas the COP timer is a dedicated watchdog timer that resets the microcontroller if it does not receive a refresh signal within a specified time period.