HD64F7047F50 Datasheet, PDF (647/766 Pages) Renesas Technology Corp – Old Company Name in Catalogs and Other Documents

Reset state
HSTBY pin = High
RES pin = Low
Program execution state
RES pin = High
SLEEP instruction
Program-halted state
HSTBY pin = Low
Hardware
standby mode
SSBY = 0
Sleep mode
(main clock)
Normal-operation
mode
(main clock)
SLEEP
instruction
External
interrupt *
SSBY = 1
Software
standby mode
: Transition after exception processing
: Power-down mode
Notes: *
NMI and IRQ
• 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.
• In any state except hardware standby mode, a transition to the reset state occurs when RES
is driven low.
• In any state, a transition to hardware standby mode occurs when HSTBY is driven low.
Figure 24.1 Mode Transition Diagram
Rev. 2.00, 09/04, page 605 of 720