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CHAPTER 16 STANDBY FUNCTION
User’s Manual U13045EJ2V0UM00
220
16.1.2 Standby function control register (
µ
PD789104, 789114 Subseries)
The wait time after the STOP mode is released upon interrupt request until the oscillation stabilizes is controlled
with the oscillation stabilization time select register (OSTS)
Note
.
OSTS is set with an 8-bit memory manipulation instruction.
RESET input sets OSTS to 04H. However, the oscillation stabilization time after RESET input is 2
15
/f
X
, instead
of 2
17
/f
X
.
Note
µ
PD789104 and 789114 Subseries only.
The
µ
PD789124 and 789134 Subseries do not provide an oscillation stabilization time select register. The
oscillation stabilization time of the
µ
PD789124 and 789134 Subseries is fixed to 2
7
/f
CC
.
Figure 16-1. Oscillation Stabilization Time Select Register Format
Caution The wait time after the STOP mode in a ceramic/crystal oscillator is released does not
include the time from STOP mode release to clock oscillation start (“a” in the figure
below), regardless of release by RESET input or by interrupt generation.
Remarks
1. f
X
: System clock oscillation frequency (ceramic/crystal oscillation)
2. Values in parentheses apply to operation with f
X
= 5.0 MHz.
OSTS2
0
0
1
0
0
0
0
0
OSTS2 OSTS1 OSTS0
OSTS
R/W
FFFAH
04H
R/W
7
6
5
4
3
2
1
0
OSTS1
0
1
0
2
12
/f
X
2
15
/f
X
2
17
/f
X
(819 s)
(6.55 ms)
(26.2 ms)
OSTS0
0
0
0
Setting prohibited
Symbol
Address
After reset
Oscillation stabilization time selection
Other than above
µ
V
SS
a
STOP mode release
X1 pin voltage
waveform
Содержание mPD789101
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