• Internal or external reference clock can be used as the FLL source.
• Can be used as a clock source for other on-chip peripherals.
• Internal reference clock generator:
• Slow clock with nine trim bits for accuracy
• Fast clock with four trim bits
• Can be used as source clock for the FLL. In FEI mode, only the slow Internal
Reference Clock (IRC) can be used as the FLL source.
• Either the slow or the fast clock can be selected as the clock source for the MCU.
• Can be used as a clock source for other on-chip peripherals.
• Control signals for the MCG external reference low power oscillator clock generators
are provided:
• HGO, RANGE, EREFS
• External clock from the Crystal Oscillator :
• Can be used as a source for the FLL.
• Can be selected as the clock source for the MCU.
• External clock monitor with reset and interrupt request capability to check for
external clock failure when running in FBE, BLPE, or FEE modes
• Internal Reference Clocks Auto Trim Machine (ATM) capability using an external
clock as a reference
• Reference dividers for the FLL are provided
• Reference dividers for the Fast Internal Reference Clock are provided
• MCG FLL Clock (MCGFLLCLK) is provided as a clock source for other on-chip
peripherals
• MCG Fixed Frequency Clock (MCGFFCLK) is provided as a clock source for other
on-chip peripherals
• MCG Internal Reference Clock (MCGIRCLK) is provided as a clock source for other
on-chip peripherals
Introduction
KL02 Sub-Family Reference Manual, Rev. 2.1, July 2013
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Freescale Semiconductor, Inc.
