CHAPTER 18 STANDBY FUNCTION
Preliminary User’s Manual U16315EJ1V0UD
353
(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 18-7. STOP Mode Release by RESET Input
(1) When X1 input clock is used as CPU clock
STOP
instruction
RESET signal
X1 input clock
Operating mode
STOP mode
Reset
period
Operation
stopped
Operating mode
Oscillates
Oscillation
stopped
Oscillates
CPU clock
(X1 input clock)
Oscillation stabilization time (2
11
/f
X
to 2
16
/f
X
)
(Ring-OSC clock)
(17/f
R
)
Oscillation stopped
(2) When Ring-OSC clock is used as CPU clock
STOP
instruction
RESET signal
Ring-OSC clock
Operating mode
STOP mode
Reset
period
Operation
stopped
Operating mode
Oscillates
Oscillation
stopped
Oscillates
CPU clock
(Ring-OSC clock)
(17/f
R
)
(Ring-OSC clock)
Table 18-5. Operation After STOP Mode Release
Release Source
MK
××
PR
××
IE
ISP
Operation
0
0
0
×
Next address
instruction execution
0
0
1
×
Interrupt servicing
execution
0
1
0
1
0
1
×
0
Next address
instruction execution
0
1
1
1
Interrupt servicing
execution
Maskable interrupt
request
1
×
×
×
STOP mode held
RESET input
−
−
×
×
Reset processing
×
: Don’t care