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Rev. 1.00, 05/04, page 47 of 544
Program execution
state
Sleep mode
Exception-handling state
Software standby mode
RES = high
Reset state*
1
STBY = high, RES = low
Hardware standby mode*
2
Power-down state*
3
Notes: 1.
2.
3.
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.
The power-down state also includes watch mode, subactive mode, subsleep mode, etc. For details,
refer to section 20, Power-Down Modes.
SLEEP
instruction
with
LSON = 0,
SSBY = 0
Interrupt
request
Request for
exception
handling
End of
exception
handling
External interrupt
request
SLEEP
instruction
with
LSON = 0,
PSS = 0,
SSBY = 1
Figure 2.13 State Transitions