CHAPTER 13 STANDBY FUNCTION
Preliminary User’s Manual U16898EJ1V0UD
235
(b) Release by reset input
When the reset signal is input, STOP mode is released and a reset operation is performed after the
oscillation stabilization time has elapsed.
Figure 13-6. STOP Mode Release by Reset Input
(1) If CPU clock is high-speed Ring-OSC clock or external input clock
STOP
instruction
Reset signal
System clock
oscillation
Operation
mode
STOP mode
Reset
period
Operation mode
Oscillation
Oscillation stops.
Oscillation
CPU status
Operation
stops
Note
.
(2) If CPU clock is crystal/ceramic oscillation clock
STOP
instruction
Reset signal
System clock
oscillation
Operation
mode
STOP mode
Reset
period
Operation
stops
Note
.
Operation
mode
Oscillation
Oscillation stops.
Oscillation
CPU status
Oscillation stabilization time
(2
10
/f
X
to 2
17
/f
X
)
Oscillation
stabilization waits
Note The operation is stopped (8/f
RL
+ 96/f
RH
) because the option byte is referenced.
Remark f
X
: System clock oscillation frequency
f
RL
: Low-speed Ring-OSC clock oscillation frequency
f
RH
: High-speed Ring-OSC clock oscillation frequency
Table 13-5. Operation in Response to Interrupt Request in STOP Mode
Release Source
MK
××
IE
Operation
0
0
Next address instruction execution
0
1
Interrupt servicing execution
Maskable interrupt request
1
×
STOP mode held
Reset input
−
×
Reset processing
×
: don’t care
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