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CHAPTER 9 WATCHDOG TIMER
Preliminary User’s Manual U16035EJ1V0UM
(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 OSTS to 04H. Thus, when releasing the STOP mode by RESET input, the time required to
release is 2
17
/f
X
.
Figure 9-4. Format of Oscillation Stabilization Time Select Register (OSTS)
Address: FFFAH After reset: 04H R/W
Symbol
7
6
5
4
3
2
1
0
OSTS
0
0
0
0
0
OSTS2
OSTS1
OSTS0
OSTS2
OSTS1
OSTS0
Selection of oscillation stabilization time
0
0
0
2
12
/f
X
(488
µ
s)
0
0
1
2
14
/f
X
(1.95 ms)
0
1
0
2
15
/f
X
(3.91 ms)
0
1
1
2
16
/f
X
(7.81 ms)
1
0
0
2
17
/f
X
(15.6 ms)
Other than the above
Setting prohibited
Remarks 1. f
X
: Main system clock oscillation frequency
2. Figures in parentheses are for operation with f
X
= 8.38 MHz