HD6432621 Hitachi, HD6432621 Datasheet - Page 733

• Manufacturer Part Number: HD6432621
• Description: (HD64F262x Series) 16-Bit Microcomputer
• Manufacturer: Hitachi

Notes: *
Program execution state
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.
SCK2 to
SCK0= 0
on interrupt source generation alone. Ensure that interrupt handling is performed after accepting the
interrupt request.
driven low.
High-speed mode
Medium-speed
(main clock)
(main clock)
Reset state
mode
: Transition after exception processing
RES pin = High
SCK2 to
SCK0 0
Figure 21A-1 Mode Transition Diagram
STBY pin = High
RES pin = Low
SLEEP command
External
interrupt *
Any interrupt
SLEEP
command
: Low power dissipation mode
Program-halted state
STBY pin = Low
standby mode
standby mode
Sleep mode
(main clock)
SSBY = 0
SSBY = 1
Hardware
Software
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