HD6432633 Datasheet, PDF (1039/1453 Pages) Renesas Technology Corp – Series of Microcomputers (MCUs: microcomputer units)

Reset state
STBY pin = High
RES pin = Low
Program-halted state
STBY pin = Low
Hardware
standby mode
Program execution state
RES pin = High
High-speed mode
(main clock)
SLEEP command
Any interrupt *³
SCK2 to
SCK0= 0
SCK2 to
SCK0≠ 0
SLEEP
command
Medium-speed
mode
(main clock)
External
interrupt *⁴
SLEEP
command
SLEEP command
SSBY = 1, PSS = 1
DTON = 1, LSON = 0
After the oscillation
stabilization time
(STS2 to 0), clock
switching exception
processing
SLEEP command
SSBY = 1, PSS = 1
DTON = 1, LSON = 1
Clock switching
exception processing
Sub-active mode
(subclock)
Interrupt *²
LSON bit = 0
SLEEP
command
Interrupt *¹
LSON bit = 1
SLEEP command
Interrupt *²
SSBY= 0, LSON= 0
Sleep mode
(main clock)
SSBY= 1,
PSS= 0, LSON= 0
Software
standby mode
SSBY= 1,
PSS= 1, DTON= 0
Watch mode
(subclock)
SSBY= 0,
PSS= 1, LSON= 1
Sub-sleep mode
(subclock)
: Transition after exception processing
: Low power dissipation mode
Notes: *1 NMI, IRQ0 to IRQ7, and WDT1 interrupts
*2 NMI, IRQ0 to IRQ7, IWDT0 interrupts, WDT1 interrupt, and TMR0 to TMR3 interrupts
*3 All interrupts
*4 NMI and IRQ0 to IRQ7
• 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.
• 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(a) Mode Transition Diagram (H8S/2633 Series, H8S/2633R)
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