h8s-2646 Renesas Electronics Corporation., h8s-2646 Datasheet - Page 769

• Manufacturer Part Number: h8s-2646
• Description: Renesas 16-bit Single-chip Microcomputer H8s Family/h8s/2600 Series
• Manufacturer: Renesas Electronics Corporation.

Notes: 1. NMI, IRQ0 to IRQ5, and WDT1 interrupts
Program execution state
SLEEP instruction
SSBY = 1, PSS = 1
DTON = 1, LSON = 0
After the oscillation
stabilization time
(STS2 to 0), clock
switching exception
processing
2. NMI, IRQ0 to IRQ5, IWDT0 interrupts, and WDT1 interrupt.
3. All interrupts
4. NMI and IRQ0 to IRQ5
• When a transition is made between modes by means of an interrupt, the transition cannot be made
• From any state except hardware standby mode, a transition to the reset state occurs when RES is
• 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 subactive mode.
on interrupt source generation alone. Ensure that interrupt handling is performed after accepting the
interrupt request.
driven Low.
SCK2 to
SCK0= 0
High-speed mode
Subactive mode
Medium-speed
(main clock)
(main clock)
Reset state
(subclock)
mode
: Transition after exception processing
RES pin = High
SCK2 to
SCK0 0
SLEEP instruction
SSBY = 1, PSS = 1
DTON = 1, LSON = 1
Clock switching
exception processing
Figure 22.1 Mode Transition Diagram
STBY pin = High
RES pin = Low
SLEEP instruction
Interrupt *
LSON bit = 0
External
interrupt *
SLEEP instruction
SLEEP
instruction
Any interrupt *
Interrupt *
Interrupt *
LSON bit = 1
SLEEP
instruction
SLEEP
instruction
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Section 22 Power-Down Modes
: Low power dissipation mode
Program-halted state
SSBY= 1,
PSS= 0, LSON= 0
SSBY= 0,
PSS= 1, LSON= 1
SSBY= 0, LSON= 0
SSBY= 1,
PSS= 1, DTON= 0
STBY pin = Low
Subsleep mode
standby mode
standby mode
Watch mode
(main clock)
Sleep mode
(subclock)
(subclock)
Hardware
Software
REJ09B0257-0500