MC9S12XEG128MAA datasheet by Freescale Semiconductor

MC9S12XEG128MAA Frequently Asked Questions (FAQs)

• What is the maximum clock frequency of the MC9S12XEG128MAA?
  The maximum clock frequency of the MC9S12XEG128MAA is 25 MHz.
• How do I configure the internal oscillator on the MC9S12XEG128MAA?
  The internal oscillator on the MC9S12XEG128MAA can be configured using the OSCCTL register. The oscillator frequency can be set to 4 MHz, 8 MHz, or 16 MHz.
• What is the purpose of the COP (Computer Operating Properly) timer on the MC9S12XEG128MAA?
  The COP timer is a watchdog timer that resets the microcontroller if it does not receive a 'kick' signal within a specified time period. This ensures that the microcontroller is operating properly and prevents it from getting stuck in an infinite loop.
• How do I use the SCI (Serial Communication Interface) module on the MC9S12XEG128MAA?
  The SCI module on the MC9S12XEG128MAA can be used for asynchronous serial communication. It can be configured using the SCI registers, and the baud rate can be set using the SCI baud rate generator.
• What is the purpose of the PLL (Phase-Locked Loop) on the MC9S12XEG128MAA?
  The PLL on the MC9S12XEG128MAA is used to multiply the clock frequency of the internal oscillator, allowing for higher clock frequencies to be achieved.