MC9S12GC128CFUE datasheet by Freescale Semiconductor

MC9S12GC128CFUE Frequently Asked Questions (FAQs)

• What is the maximum operating temperature range for this microcontroller?
  The MC9S12GC128CFUE can operate from -40°C to 125°C, but the recommended operating temperature range is -40°C to 105°C.
• How do I configure the internal clock oscillator?
  The internal clock oscillator can be configured using the SYNR and REFSYN registers. The SYNR register sets the oscillator frequency, and the REFSYN register selects the oscillator source.
• What is the maximum frequency for the external clock input?
  The maximum frequency for the external clock input is 20 MHz.
• How do I use the built-in bootloader?
  The built-in bootloader can be accessed by pulling the MODE pin low during reset. The bootloader allows programming of the flash memory through the serial communication interface (SCI).
• 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.