• Automatic Gain Control (AGC) to optimize power consumption in high frequency
ranges 3–8 MHz, 8–32 MHz using low-power mode
• High gain option in frequency ranges: 32 kHz, 3–8 MHz, and 8–32 MHz
• Voltage and frequency filtering to guarantee clock frequency and stability
• Optionally external input bypass clock from EXTAL signal directly
• One clock for MCU clock system
• Two clocks for on-chip peripherals that can work in Stop modes
describes the module's operation in more detail.
28.4 Block Diagram
The OSC module uses a crystal or resonator to generate three filtered oscillator clock
signals.Three clocks are output from OSC module: OSCCLK for MCU system,
OSCERCLK for on-chip peripherals, and OSC32KCLK. The OSCCLK can only work in
run mode. OSCERCLK and OSC32KCLK can work in low power modes. For the clock
source assignments, refer to the clock distribution information of this MCU.
Refer to the chip configuration details for the external reference clock source in this
MCU.
The figure found here shows the block diagram of the OSC module.
Block Diagram
KL27 Sub-Family Reference Manual , Rev. 5, 01/2016
444
Freescale Semiconductor, Inc.
