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H8S2245 датащи(PDF) 100 Page - Renesas Technology Corp

номер детали H8S2245
подробное описание детали  Renesas 16-Bit Single-Chip Microcomputer H8S Family / H8S/2200 Series
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производитель  RENESAS [Renesas Technology Corp]
домашняя страница  http://www.renesas.com
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Section 2 CPU
Rev.3.00 Mar. 26, 2007 Page 58 of 772
REJ09B0355-0300
End of bus request
Bus request
Program execution
state
Bus-released state
Sleep mode
Exception-handling state
External interrupt
Software standby mode
RES = high
Reset state*1
STBY = high, RES = low
Hardware standby mode*2
Power-down state
Notes: 1.
2.
From any state except hardware standby mode, a transition to the reset state occurs whenever
RES
goes low. A transition can also be made to the reset state when the watchdog timer overflows.
From any state, a transition to hardware standby mode occurs when
STBY goes low.
SLEEP
instruction
with
SSBY = 0
SLEEP
instruction
with
SSBY = 1
Interrupt
request
End of bus
request
Bus
request
Request for
exception
handling
End of
exception
handling
Figure 2.15 State Transitions
2.8.2
Reset State
When the
RES input goes low all current processing stops and the CPU enters the reset state. All
interrupts are masked in the reset state. Reset exception handling starts when the
RES signal
changes from low to high.
The reset state can also be entered by a watchdog timer overflow. For details, refer to section 11,
Watchdog Timer.



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