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141
μ
PD75518(A)
The wait times used when the STOP mode is released do not include a time (a in
Fig. 6-2
) required before
clock generation is started following the release of the STOP mode, regardless of whether the STOP mode
is released by RESET signal input or the generation of an interrupt.
Fig. 6-2 Start of Clock Generation
When the STOP mode is released by the occurrence of an interrupt, a wait time is determined by BTM.
(See
Table 6-2.
)
Table 6-2 Selection of a Wait Time with BTM
(When f
X
= 6.0 MHz)
(When f
X
= 4.19 MHz)
Note
This time does not include the time from the release of the STOP mode to the start of oscillation.
6.3 OPERATION AFTER A STANDBY MODE IS RELEASED
(1) If a standby mode is released by a RESET input, normal reset operation is performed.
(2) If a standby mode is released by the occurrence of an interrupt request, the interrupt master enable flag
(IME) determines whether to perform a vectored interrupt when the CPU resumes instruction execution.
(a) When IME = 0
After the standby mode is released, execution of an instruction is restarted immediately after the
instruction which set the standby mode.
The interrupt request flag is held.
(b) When IME = 1
After the standby mode is released, two instructions are executed, then a vectored interrupt is caused.
However, when the standby mode is released by INTW or INT2 (input of a testable signal), no vectored
interrupt is caused and the same processing as (a) above is performed.
a
STOP mode release
Wave-form
at the X1 pin
GND
BTM3
–
–
–
–
BTM2
0
0
1
1
BTM1
0
1
0
1
BTM0
1
1
1
1
Wait time
Note
. ( ) indicates the value for f
X
= 4.19 MHz
Approx. 2
20
/f
X
(Approx. 250 ms)
Approx. 2
17
/f
X
(Approx. 31.3 ms)
Approx. 2
15
/f
X
(Approx. 7.82 ms)
Approx. 2
13
/f
X
(Approx. 1.95 ms)
Use prohibited
Other than above
BTM3
–
–
–
–
BTM2
0
0
1
1
BTM1
0
1
0
1
BTM0
0
1
1
1
Other than above
Wait time
Note
. ( ) indicates the value for f
X
= 6.0 MHz
Approx. 2
20
/f
X
(Approx. 175 ms)
Approx. 2
17
/f
X
(Approx. 21.8 ms)
Approx. 2
15
/f
X
(Approx. 5.46 ms)
Approx. 2
13
/f
X
(Approx. 1.37 ms)
Use prohibited