CHAPTER 7 8-BIT TIMER/EVENT COUNTER
154
User’s Manual U11302EJ4V0UM
Figure 7-4. Format of Timer Clock Select Register 1
Caution If TCL1 is to be rewritten with data other than identical data, the timer operation must be stopped
first.
Remarks 1.
f
X
:
Main system clock oscillation frequency
2.
TI1: 8-bit timer register 1 input pin
3.
TI2: 8-bit timer register 2 input pin
4.
Figures in parentheses apply to operation with f
X
= 5.0 MHz.
TCL10
TCL1
7
6
5
4
3
2
Symbol
1
0
TCL13
8-bit timer register 1 count
clock selection
FF41H
TCL11
TCL13 TCL12
TCL14
TCL15
TCL16
TCL17
Address
After reset
R/W
00H
R/W
0
TI1 falling edge
0
TI1 rising edge
0
f
X
/2 (2.5 MHz)
0
f
X
/2
2
(1.25 MHz)
0
f
X
/2
3
(625 kHz)
1
f
X
/2
4
(313 kHz)
1
f
X
/2
5
(156 kHz)
1
f
X
/2
6
(78.1 kHz)
1
f
X
/2
7
(39.1 kHz)
1
f
X
/2
8
(19.5 kHz)
1
f
X
/2
9
(9.8 kHz)
1
f
X
/2
10
(4.9 kHz)
1
f
X
/2
12
(1.2 kHz)
Setting prohibited
TCL12
0
0
1
1
1
0
0
0
0
1
1
1
1
TCL11
0
0
0
1
1
0
0
1
1
0
0
1
1
Other than above
TCL10
0
1
1
0
1
0
1
0
1
0
1
0
1
TCL17
8-bit timer register 2 count
clock selection
0
TI2 falling edge
0
TI2 rising edge
0
f
X
/2 (2.5 MHz)
0
f
X
/2
2
(1.25 MHz)
0
f
X
/2
3
(625 kHz)
1
f
X
/2
4
(313 kHz)
1
f
X
/2
5
(156 kHz)
1
f
X
/2
6
(78.1 kHz)
1
f
X
/2
7
(39.1 kHz)
1
f
X
/2
8
(19.5 kHz)
1
f
X
/2
9
(9.8 kHz)
1
f
X
/2
10
(4.9 kHz)
1
f
X
/2
12
(1.2 kHz)
Setting prohibited
TCL16
0
0
1
1
1
0
0
0
0
1
1
1
1
TCL15
0
0
0
1
1
0
0
1
1
0
0
1
1
Other than above
TCL14
0
1
1
0
1
0
1
0
1
0
1
0
1
Содержание mPD780208 Subseries
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