Fujitsu F2MC-16LX Hardware Manual page 160

CHAPTER 6 LOW-POWER CONSUMPTION MODE
Sub sleep mode
The sub-sleep mode terminates the CPU operation clock in the sub clock mode and operates components
except for the CPU under the sub clock.
Timebase timer mode
The timebase timer mode terminates all the operations other than the oscillation clock, the timebase timer,
and the clock timer, terminating all the functions other than the timebase timer and the watch timer.
Watch mode
It is a mode by which only the clock timer is operated. Only the sub clock operates and the main clock and
PLL multiplication circuit stops.
Stop mode
Stop mode is mode for stopping original oscillation and all functions are stopped.
Note:
In the stop mode, data is kept at the lowest power consumption since the oscillation clock is
terminated.
When you change the clock mode, be sure not to shift to other clock modes or the low-power
consumption mode until you complete the clock mode change. Completion of the switching can be
checked by referring the MCM and SCM bits of the CKSCR.
144