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CHAPTER 5 CLOCK GENERATOR
User’s Manual U19780EJ2V0UD
146
Caution
It is not necessary to wait for the oscillation stabilization time when an external clock input from
the EXCLK pin is used.
Remark
While the microcontroller is operating, a clock that is not used as the CPU clock can be stopped via
software settings. The internal high-speed oscillation clock and high-speed system clock can be
stopped by executing the STOP instruction (see
(4)
in
5.6.1 Example of controlling high-speed
system clock
,
(3)
in
5.6.2 Example of controlling internal high-speed oscillation clock
, and
(3)
in
5.6.3 Example of controlling subsystem clock
).