HD6432646 Hitachi, HD6432646 Datasheet - Page 761
HD6432646
Manufacturer Part Number
HD6432646
Description
(HD64F264x Series) 16-Bit Microcomputer
Manufacturer
Hitachi
Datasheet
1.HD6432646.pdf
(1155 pages)
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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 sub-active 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
Sub-active 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
External
interrupt *
Interrupt *
LSON bit = 0
SLEEP instruction
SLEEP
instruction
Any interrupt *
Interrupt *
Interrupt *
LSON bit = 1
SLEEP
instruction
SLEEP
instruction
4
1
2
1
3
: 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
Sub-sleep mode
standby mode
standby mode
Watch mode
(main clock)
Sleep mode
(subclock)
(subclock)
Hardware
Software
727
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