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(3) Oscillation stabilization time select register (OSTS)
A register to select oscillation stabilization time from reset time or STOP mode released time to the time when
oscillation is stabilized.
OSTS is set by an 8-bit memory manipulation instruction.
RESET input sets the value of this register to 04H. Thus, when releasing the STOP mode by RESET input, the
time required to release is 2
Figure 10-4. Format of Oscillation Stabilization Time Select Register (OSTS)
Address: FFFAH
After reset: 04H
Symbol
7
OSTS
0
OSTS2
0
0
0
0
1
Other than the above
Remarks 1. f
: Main system clock oscillation frequency
X
2. Figures in parentheses are for operation with f
CHAPTER 10 WATCHDOG TIMER
17
/f
.
X
R/W
6
5
4
0
0
0
OSTS1
OSTS0
12
0
0
2
/f
X
14
0
1
2
/f
X
15
1
0
2
/f
X
16
1
1
2
/f
X
17
0
0
2
/f
X
Setting prohibited
User's Manual U15798EJ2V0UD
3
2
0
OSTS2
Selection of oscillation stabilization time
(410 µ s)
(1.64 ms)
(3.28 ms)
(6.55 ms)
(13.1 ms)
= 10 MHz
X
1
0
OSTS1
OSTS0
215
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