MK20DX256VLK7 datasheet by Freescale Semiconductor

MK20DX256VLK7 Frequently Asked Questions (FAQs)

• What is the maximum operating frequency of the MK20DX256VLK7?
  The maximum operating frequency of the MK20DX256VLK7 is 72 MHz, but it can be overclocked to 120 MHz with a reduced voltage supply.
• How do I configure the clock source for the MK20DX256VLK7?
  The clock source for the MK20DX256VLK7 can be configured using the MCG (Multipurpose Clock Generator) module. The MCG allows the user to select between an internal clock source, an external clock source, or a clock source from a crystal oscillator.
• What is the maximum amount of current that the MK20DX256VLK7 can source or sink on its GPIO pins?
  The maximum amount of current that the MK20DX256VLK7 can source or sink on its GPIO pins is 25 mA. However, it is recommended to limit the current to 15 mA to ensure reliable operation.
• How do I implement a bootloader on the MK20DX256VLK7?
  A bootloader on the MK20DX256VLK7 can be implemented using the ROM-based bootloader provided by Freescale Semiconductor. The bootloader can be configured to load firmware from an external flash memory or from a serial interface such as UART or USB.
• What is the maximum amount of flash memory that can be accessed by the MK20DX256VLK7?
  The MK20DX256VLK7 has 256 KB of internal flash memory, but it can also access external flash memory up to 4 GB using the FlexBus interface.