Chapter 4
Clock/ Mode/ Voltage Control
Mode Control Function IV - 17
4.2.2 SLOW Mode
Transition from NORMAL to SLOW
Figure:4.2.6 shows the mode transition procedure from NORMAL to SLOW.
(The low-speed clock oscillation is enabled in the low-speed oscillation clock control register (SCLKCNT). Fig-
ure:4.1.1 shows the Operation Enable signal for external slow-speed oscillation circuit or internal slow-speed
oscillation circuit.)
Figure:4.2.6 Transition Flow from NORMAL Mode to SLOW Mode
..
The oscillation stabilization wait time should be determined in consultation with the manufac-
turer of oscillator.
..
Transition to SLOW mode
Set the CPUM as described in Table 4.1.3.)
The low-speed oscillation
stabilization wait time
Start the low-speed oscillation (*)
CPUM.XIMOD = 1
(*) When SCLKCNT.SOSCCNT=1, SOSCCLK start
When SCLKCNT.SRCCNT=1, SRCCLK starts.
CPUM.XIMOD == 1
NO
YES
NORMAL mode
SLOW mode
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