Datasheet

Section 24 Power-Down Modes
Rev. 6.00 Mar. 18, 2010 Page 785 of 982
REJ09B0054-0600
4. Supported only by the H8S/2258 Group.
5. The analog output value does not satisfy the specified D/A absolute accuracy when D/A
is halted (retained). However, the H8S/2258 Group, H8S/2238B, and H8S/2236B
satisfy the specified D/A absolute accuracy.
Program-halted state
Program execution state
SCK2 to
SCK0 = 0
SCK2 to
SCK0 ≠ 0
SLEEP instruction
SSBY = 1, PSS = 1
DTON = 1, LSON = 1
Clock switching
exception processing
SLEEP instruction
SSBY = 1, PSS = 1
DTON = 1, LSON = 0
After the oscillation
settling time
(STS2 to 0), clock
switching exception
processing
SLEEP instruction
SLEEP
instruction
External
interrupt
*
3
All interrupt
SLEEP
instruction
SLEEP
instruction
SLEEP instruction
Interrupt
*
1
LSON bit = 0
Interrupt
*
2
Interrupt
*
1
LSON bit = 1
STBY pin = High
RES pin = Low
STBY pin = Low
SSBY = 0, LSON = 0
SSBY = 1,
PSS = 0, LSON = 0
SSBY = 0,
PSS = 1, LSON = 1
SSBY = 1,
PSS = 1, DTON = 0
RES pin = HighMRES pin = High
: Transition after exception processing : Low power dissipation mode
Power on
reset state
Manual
reset state
Reset state
High-speed mode
(main clock)
Medium-speed
mode
(main clock)
Sub-active mode
(subclock)
Sub-sleep mode
(subclock)
Hardware
standby mode
Software
standby mode
Sleep mode
(main clock)
Watch mode
(subclock)
Notes:
1.
2.
3.
NMI, IRQ7 to IRQ0, and WDT1 interrupts.
NMI, IRQ7 to IRQ0, and WDT1, WDT0, and TMR3 to TMR0 interrupts.
NMI, IRQ7 to IRQ0
When a transition is made between modes by means of an interrupt, the transition cannot be made
on interrupt source generation alone. Ensure that interrupt handling is performed after accepting the
interrupt request.
From any state except hardware standby mode, a transition to the reset state occurs when RES is
driven Low. At any state except hardware standby mode and power-on reset state, a transition to
the manual reset state occurs when the MRES pin is driven Low.
From any state, a transition to hardware standby mode occurs when STBY is driven low.
Always select high-speed mode before making a transition to watch mode or sub-active mode.
Figure 24.1 Mode Transition Diagram