Information

FEEFEI
Reset
BLPI
FBI FBE
BLPE
PBE
PEE
Stop
Returns to the state that was active before
the MCU entered Stop mode, unless a
reset occurs while in Stop mode.
Entered from any state when
the MCU enters Stop mode
Figure 24-12. MCG Mode State Diagram
NOTE
• During exits from LLS or VLPS when the MCG is in PEE
mode, the MCG will reset to PBE clock mode and the
C1[CLKS] and S[CLKST] will automatically be set to
2’b10.
• If entering Normal Stop mode when the MCG is in PEE
mode with C5[PLLSTEN]=0, the MCG will reset to PBE
clock mode and C1[CLKS] and S[CLKST] will
automatically be set to 2’b10.
24.4.1.1 MCG Modes of Operation
The MCG operates in one of the following modes.
Note
The MCG restricts transitions between modes. For the
permitted transitions, see Figure 24-12.
Chapter 24 Multipurpose Clock Generator (MCG)
K20 Sub-Family Reference Manual, Rev. 6, Nov 2011
Freescale Semiconductor, Inc. 539