Fujitsu F2MC-8FX Hardware Manual page 486

CHAPTER 26 CLOCK SUPERVISOR
Control circuit
This block controls the clocks, resets, and other settings based on the information in the CSV control
register (CSVCR).
CR oscillator circuit
This block is a internal CR oscillator circuit. The oscillation can be turned on or off via a control signal
from the control circuit. This also serves as an internal clock after a clock halt is detected.
Main clock monitor
This block monitors whether the main clock halts.
Sub clock monitor
This block monitors whether the sub clock halts.
Main clock selector
This block outputs the CR clock as the internal main clock upon detection of a main clock halt.
Sub clock selector
This block outputs the clock obtained by dividing the CR clock as the internal sub clock upon detection of a
sub clock halt.
CSV control register (CSVCR)
This block is used to control clock monitoring and CR clock and to check information on halt detection.
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