CHAPTER 17 STANDBY FUNCTION
360
User’s Manual U11302EJ4V0UM
17.1.2 Standby function control register
The wait time after the STOP mode is released by an interrupt request until the oscillation stabilizes is
controlled by the oscillation stabilization time select register (OSTS).
OSTS is set with an 8-bit memory manipulation instruction.
RESET input sets OSTS to 04H. Therefore, when the STOP mode is released by RESET input, the time until
it is released is 2
17
/fx.
Figure 17-1. Format of Oscillation Stabilization Time Select Register
Caution The wait time after STOP mode release does not include the time from STOP mode release
to clock oscillation start (see “a” below), regardless of whether the STOP mode is released
by RESET input or by interrupt request generation.
Remarks 1.
f
X
: Main system clock oscillation frequency
2.
Figures in parentheses apply to operation with f
X
= 5.0 MHz.
6
5
4
3
2
1
0
7
Symbol
OSTS
0
0
0
0
0
OSTS2 OSTS1 OSTS0
FFFAH 04H R/W
Address After reset R/W
OSTS2
0
0
0
OSTS1
0
0
1
0
1
1
0
Other than above
Selection of oscillation stabilization
time after STOP mode is released
2
12
/f
X
(819 s)
OSTS0
0
1
0
1
Setting prohibited
0
2
17
/f
X
(26.2 ms)
2
16
/f
X
(13.1 ms)
2
15
/f
X
(6.55 ms)
2
14
/f
X
(3.28 ms)
µ
V
SS
STOP mode release
X1 pin
voltage
waveform
a
Содержание mPD780208 Subseries
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