249
CHAPTER 11 WATCHDOG TIMER
Figure 11-2. Timer Clock Select Register 2 Format
Caution
When rewriting TCL2 to other data, stop the timer operation beforehand.
Remarks 1. f
XX
: Main system clock frequency (f
X
or f
X
/2)
2. f
X
: Main system clock oscillation frequency
3. f
XT
: Subsystem clock oscillation frequency
4.
×
: Don't care
5. MCS : Bit 0 of oscillation mode selection register (OSMS)
6. Figures in parentheses apply to operation with f
X
= 5.0 MHz or f
XT
= 32.768 kHz.
TCL27
7
TCL26
6
TCL25 TCL24
4
0
3
2
1
0
FF42H
Address
TCL2
Symbol
TCL22 TCL21 TCL20
5
00H
After
Reset
R/W
R/W
0
0
0
0
1
1
1
1
0
0
1
1
0
0
1
1
0
1
0
1
0
1
0
1
TCL22 TCL21 TCL20
f
XX
/2
3
f
XX
/2
4
f
XX
/2
5
f
XX
/2
6
f
XX
/2
7
f
XX
/2
8
f
XX
/2
9
f
XX
/2
11
f
X
/2
3
f
X
/2
4
f
X
/2
5
f
X
/2
6
f
X
/2
7
f
X
/2
8
f
X
/2
9
f
X
/2
11
f
X
/2
4
f
X
/2
5
f
X
/2
6
f
X
/2
7
f
X
/2
8
f
X
/2
9
f
X
/2
10
f
X
/2
12
Watchdog Timer Count Clock Selection
0
1
TCL24
f
XX
/2
7
f
XT
(32.768 kHz)
f
X
/2
7
(39.1 kHz)
f
X
/2
8
(19.5 kHz)
Watch Timer Count Clock Selection
0
1
1
1
1
×
0
0
1
1
×
0
1
0
1
TCL27 TCL26 TCL25
Buzzer output disable
f
XX
/2
9
f
XX
/2
10
f
XX
/2
11
Setting prohibited
f
X
/2
9
(9.8 kHz)
f
X
/2
10
(4.9 kHz)
f
X
/2
11
(2.4 kHz)
f
X
/2
10
(4.9 kHz)
f
X
/2
11
(2.4 kHz)
f
X
/2
12
(1.2 kHz)
(625 kHz)
(313 kHz)
(156 kHz)
(78.1 kHz)
(39.1 kHz)
(19.5 kHz)
(9.8 kHz)
(2.4 kHz)
(313 kHz)
(156 kHz)
(78.1 kHz)
(39.1 kHz)
(19.5 kHz)
(9.8 kHz)
(4.9 kHz)
(1.2 kHz)
MCS = 1
MCS = 0
Buzzer Output Frequency Selection
MCS = 1
MCS = 0
MCS = 1
MCS = 0
Summary of Contents for PD78056F
Page 2: ...2 MEMO ...
Page 14: ...14 MEMO ...
Page 34: ...34 MEMO ...
Page 154: ...154 MEMO ...
Page 170: ...170 MEMO ...
Page 238: ...238 MEMO ...
Page 278: ...278 MEMO ...
Page 432: ...432 MEMO ...
Page 476: ...476 MEMO ...
Page 548: ...548 MEMO ...
Page 564: ...564 MEMO ...
Page 580: ...580 MEMO ...
Page 584: ...584 MEMO ...
Page 592: ...592 MEMO ...