HD64F2168 Datasheet, PDF (776/874 Pages) Renesas Technology Corp – Renesas 16-Bit Single-Chip Microcomputer

Reset state
STBY pin = High
RES pin = Low
RES pin = High
Program execution state
High-speed mode
(main clock)
SLEEP instruction
Any interrupt
SCK2 to
SCK0 are
0
SCK2 to
SCK0 are
not 0
Medium-speed
mode
(main clock)
SLEEP
instruction
External
interrupt *³
SLEEP
instruction
SLEEP instruction
SSBY = 1, PSS = 1,
DTON = 1, LSON = 0
After the oscillation
stabilization time
(STS2 to STS0), clock
switching exception
processing
SLEEP instruction
SSBY = 1, PSS = 1,
DTON = 1, LSON = 1
Clock switching
exception processing
Subactive mode
(subclock)
Interrupt *¹
LSON bit = 0
SLEEP
instruction
Interrupt *¹
LSON bit = 1
SLEEP instruction
Interrupt *²
Program halt state
STBY pin = Low
Hardware
standby mode
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
Subsleep mode
(subclock)
: Transition after exception processing
: Power-down mode
Notes: • 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.
• Always select high-speed mode before making a transition to watch mode or sub-active mode.
1. NMI, IRQ0 to IRQ15, KIN0 to KIN15, WUE8 to WUE15, and WDT_1 interrupts
2. NMI, IRQ0 to IRQ15, KIN0 to KIN15, WUE8 to WUE15, WDT_0, WDT_1, TMR_0,
and TMR_1 interrupts
3. NMI, IRQ0 to IRQ15, KIN0 to KIN15, and WUE8 to WUE15 interrupts
Figure 23.1 Mode Transition Diagram
Rev. 3.00, 03/04, page 736 of 830