Chapter 4
Clock/ Mode/ Voltage Control
Mode Control Function IV - 21
Figure:4.2.11 Transition Flow from CPU Operating Mode to HALT3 Mode
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If the value of xICR.LV1-0 for an interrupt to be used as a return factor is equal or larger than
the value of PSW.IM1-0 before transition to STANDBY mode, it is impossible to return to
CPU operating mode by a maskable interrupt.
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Transition to HALT3 mode
(Set the CPUM as described in Table 4.1.3.)
CPUM.XIMOD == 1
NO
YES
HALT3 mode
NORMAL/SLOW mode
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.
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