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CHAPTER 11 WATCHDOG TIMER
235
Figure 11-2. Timer Clock Select Register 2 Format
Symbol
7
6
5
4
3
2
1
0
Address
When Reset
R/W
TCL2
TCL27 TCL26 TCL25 TCL24
0
TCL22 TCL21 TCL20
FF42H
00H
R/W
TCL22 TCL21 TCL20
Watchdog Timer Count
Clock Selection
0
0
0
f
X
/2
4
(625 kHz)
0
0
1
f
X
/2
5
(313 kHz)
0
1
0
f
X
/2
6
(156 kHz)
0
1
1
f
X
/2
7
(78.1 kHz)
1
0
0
f
X
/2
8
(39.1 kHz)
1
0
1
f
X
/2
9
(19.5 kHz)
1
1
0
f
X
/2
10
(9.8 kHz)
1
1
1
f
X
/2
12
(2.4 kHz)
TCL24
Watch Timer Count Clock Selection
0
f
X
/2
8
(39.1 kHz)
1
f
XT
(32.768 kHz)
TCL27 TCL26 TCL25
Buzzer Output Frequency
Selection
0
×
×
Buzzer output disable
1
0
0
f
X
/2
10
(9.8 kHz)
1
0
1
f
X
/2
11
(4.9 kHz)
1
1
0
f
X
/2
12
(2.4 kHz)
1
1
1
Setting prohibited
Caution
If data other than identical data is to be rewritten to TCL2, the timer operation must be stopped
first.
Remarks
1.
f
X
: Main system clock oscillation frequency
2.
f
XT
: Subsystem clock oscillation frequency
3.
×
: don’t care
4.
Values in parentheses apply to operation with f
X
= 10.0 MHz or f
XT
= 32.768 kHz.
Содержание 78014Y Series
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