K60P100M100SF2RM Datasheet, PDF (569/1809 Pages) Freescale Semiconductor, Inc – K60 Sub-Family Reference Manual

Chapter 24 Multipurpose Clock Generator (MCG)
• C1[CLKS] set to 2'b01 in order to switch the system clock to the internal
reference clock.
• C1[IREFS] set to 1 to select the internal reference clock as the reference
clock source.
• C1[FRDIV] remain unchanged because the reference divider does not affect
the internal reference.
b. Loop until S[IREFST] is 1, indicating the internal reference clock has been
selected as the reference clock source.
c. Loop until S[CLKST] are 2'b01, indicating that the internal reference clock is
selected to feed MCGOUTCLK.
4. Lastly, FBI transitions into BLPI mode.
a. C2 = 0x02
• C2[LP] is 1
• C2[RANGE], C2[HGO], C2[EREFS], C1[IRCLKEN], and C1[IREFSTEN]
bits are ignored when the C1[IREFS] bit is set. They can remain set, or be
cleared at this point.
K60 Sub-Family Reference Manual, Rev. 6, Nov 2011
Freescale Semiconductor, Inc.
569