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Slide 55
Lab 3 – Internal Clock Source
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ICS’s seven modes of operation
FLL Engaged Internal (FEI): This is the default mode of operation.
The ICS supplies a clock derived from the FLL which is controlled
by the internal reference clock.
FLL Bypassed Internal (FBI): In this mode the FLL is enabled and
controlled by the internal reference clock, but it is bypassed. The
ICS supplies a clock derived from the internal reference clock.
FLL Bypassed Internal Low Power (FBILP): In this mode the FLL
is disabled and bypassed, and the ICS supplies a clock derived
from the internal reference clock. The BDC clock is not available.
FLL Engaged External (FEE): In this mode the ICS supplies a
clock derived from the FLL which is controlled an external
reference clock.
