Section 19 Power-Down Modes
Rev. 3.00 Mar. 14, 2006 Page 672 of 804
REJ09B0104-0300
Operating State Sleep Mode
All-Module-Clock-Stop Mode Software Standby Mode
I/O port
Functions
Retained
Retained
Notes: "Halted (retained)" in the table means that the internal register values are retained and
internal operations are suspended.
1. SCI, HCAN, and SSU enter the reset state, and other peripheral modules retain their
states.
2. External interrupt and some internal interrupts (watchdog timer)
3. HCAN and SSU enter the reset state, and other peripheral modules retain their states.
SLEEP
instruction
SLEEP instruction
All interrupts
SLEEP instruction
External
interrupt
*
2
Interrupt
*
1
SSBY = 0
SSBY = 0, ACSE = 1
MSTPCR = H'F[0-F]FFFFFF
SSBY = 1
RES
pin = high
Transition after exception handling
Reset state
Program execution state
Program halted state
Sleep mode
Notes: 1. NMI,
IRQ0
to
IRQ14
, and watchdog timer interrupts.
2.
NMI
and
IRQ0
to
IRQ14
. Note that IRQ is valid only when the corresponding bit in SSIER is set to 1.
All-module-clock-
stop mode
Software standby mode
Figure 19.1 Mode Transitions
19.2 Register
Descriptions
The registers related to the power-down modes are shown below. For details on the system clock
control register (SCKCR), refer to section 18.1.1, System Clock Control Register (SCKCR).
•
Standby control register (SBYCR)
•
Module stop control register A (MSTPCRA)
•
Module stop control register B (MSTPCRB)
•
Module stop control register C (MSTPCRC)
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