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Symbol
7
TCL2
TCL27 TCL26 TCL25 TCL24
www.DataSheet4U.com
Caution
If data other than identical data is to be rewritten to TCL2, the timer operation must be stopped
first.
Remarks 1. f
2. f
3. ×
4. Values in parentheses apply to operation with f
226
CHAPTER 10 WATCH TIMER
Figure 10-2. Timer Clock Select Register 2 Format
6
5
4
3
0
: Main system clock oscillation frequency
X
: Subsystem clock oscillation frequency
XT
: don't care
2
1
0
Address
TCL22 TCL21 TCL20
FF42H
TCL22 TCL21 TCL20
0
0
0
0
1
1
1
1
TCL24
0
1
TCL27 TCL26 TCL25
0
1
1
1
1
= 10.0 MHz or f
X
When Reset
R/W
00H
R/W
Watchdog Timer Count
Clock Selection
4
0
0
f
/2
(625 kHz)
X
5
0
1
f
/2
(313 kHz)
X
1
0
f
/2
6
(156 kHz)
X
7
1
1
f
/2
(78.1 kHz)
X
0
0
f
/2
8
(39.1 kHz)
X
0
1
f
/2
9
(19.5 kHz)
X
10
1
0
f
/2
(9.8 kHz)
X
1
1
f
/2
12
(2.4 kHz)
X
Watch Timer Count Clock Selection
f
/2
8
(39.1 kHz)
X
f
(32.768 kHz)
XT
Buzzer Output Frequency
Selection
×
×
Buzzer output disable
0
0
f
/2
10
(9.8 kHz)
X
11
0
1
f
/2
(4.9 kHz)
X
12
1
0
f
/2
(2.4 kHz)
X
1
1
Setting prohibited
= 32.768 kHz.
XT
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