K60P100M100SF2RM Datasheet, PDF (574/1809 Pages) Freescale Semiconductor, Inc – K60 Sub-Family Reference Manual

Block Diagram
25.3 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 chapter for the external reference clock source in this
MCU.
The following figure shows the block diagram of the OSC module.
OSC Clock Enable
Range selections
Low Power config
OSC clock selection
STOP
EXTAL
XTAL
Oscillator Circuits
ERCLKEN EREFSTEN
OSC_EN
XTL_CLK
OSC_CLK_OUT
Mux
ERCLKEN
OSCERCLK
EN
OSC32KCLK
4096
Counter
CNT_DONE_4096
Control and Decoding
logic
OSCCLK
Figure 25-1. OSC Module Block Diagram
25.4 OSC Signal Descriptions
The following table shows the user-accessible signals available for the OSC module.
Refer to signal multiplexing information for this MCU for more details.
K60 Sub-Family Reference Manual, Rev. 6, Nov 2011
574
Freescale Semiconductor, Inc.