R01UH0823EJ0100 Rev.1.00
Page 223 of 1823
Jul 31, 2019
RX23W Group
11. Low Power Consumption
Figure 11.1
Mode Transitions
Sleep mode
All interrupts
: A transition is made by executing exception handling.
Low power consumption mode (Program stopped state)
Software standby
mode
Reset state
SSBY = 0
SSBY = 1
: A transition is made by setting registers.
*
3
*
4
Interrupt*
2
WAIT instruction*
1
WAIT instruction*
1
Deep sleep mode
SSBY = 0
MSTPCRA.MSTPA28 = 1
MSTPCRC.DSLPE = 1
All interrupts
WAIT instruction*
1
Normal operation mode
(Program execution state)
Note 1. If an interrupt is accepted while entering low power consumption mode, the transition to the program stop state is exited
and the interrupt exception handling is executed.
Note 2. “Interrupts” here indicates an external pin interrupt (the NMI, IRQ0, IRQ1, or IRQ4 to IRQ7) or any of peripheral interrupts
(the RTC alarm, RTC interval, IWDT, voltage monitoring, VBATT pin voltage drop detection interrupts USB and ELC (LPT-
dedicated interrupt) interrupts).
Note 3. The LOCO is the clock source following a transition from the reset state to normal mode.
Note 4. Makes a transition from sleep mode, deep sleep mode, or software standby mode to normal operating mode by an
interrupt. In the case of exiting sleep mode, the clock source after exiting is selectable. For details, refer to the description
of the RSTCKCR register.
For deep sleep mode and software standby mode, the clock source after exiting is the same as that of the clock before
entering software standby mode.
Transition to the reset state is made at any state instantly after a RES# pin reset, power on reset, voltage monitoring reset, WDT
reset, IWDT reset, or software reset is generated.