MC80F0204 Datasheet, PDF (51/126 Pages) List of Unclassifed Manufacturers – 8-BIT SINGLE-CHIP MICROCONTROLLERS

Preliminary
MC80F0104/0204
13.1 8-bit Timer / Counter Mode
The MC80F0104/0204 has four 8-bit Timer/Counters,
Timer 0, Timer 1, Timer 2, Timer 3. The Timer 0, Timer 1
are shown in Figure 13-3 and Timer 2, Timer 3 are shown
in Figure 13-4 .
The “timer” or “counter” function is selected by control
registers TM0, TM1, TM2, TM3 as shown in Figure 13-1
. To use as an 8-bit timer/counter mode, bit CAP0, CAP1,
CAP2, or CAP3 of TMx should be cleared to “0” and
16BIT and PWM1E or PWM3E of TM1 or TM3 should be
cleared to "0" (Figure 13-3 ). These timers have each 8-bit
count register and data register. The count register is in-
creased by every internal or external clock input. The inter-
nal clock has a prescaler divide ratio option of 1, 2, 4, 8, 16,
32, 64, 128, 256, 512, 1024, 2048 or external clock (select-
ed by control bits TxCK0, TxCK1, TxCK2 of register
TMx).
TM0
TM1
7
6
5
4
3
2
1
0
-
- CAP0 T0CK2 TB0TCCKL1 T0CK0 T0CN T0ST
-
-
0
X
X
XX
X
ADDRESS: 0D0_H
INITIAL VALUE: --00 0000_B
X means don’t care
7
6
5
4
3
2
1
0
POL 16BIT PWM1E CAP1 TB1TCCKL1 T1CK0 T1CN T1ST
X0
0
0
X
X
X
X
ADDRESS: 0D2_H
INITIAL VALUE: 00_H
X means don’t care
EC0 PIN
X_IN PIN
EDGE
DETECTOR
T0CK[2:0]
111
÷ 2 ₀₀₀
÷4
001
÷8
010
÷ 32 ₀₁₁
÷ 128
100
÷ 512
101
÷ 2048 ₁₁₀
MUX
T1CK[1:0]
11
÷1
00
÷2
01
÷ 8 ₁₀
MUX
T0CN
TIMER 0
T0ST
0: Stop
1: Clear and start
T0 (8-bit)
clear
Comparator
TDR0 (8-bit)
T0IF
TIMER 0
INTERRUPT
F/F
R05 / T0O
T1CN
TIMER 1
T1ST
0: Stop
1: Clear and start
T1 (8-bit)
clear
Comparator
TDR1 (8-bit)
T1IF
TIMER 1
INTERRUPT
Figure 13-3 8-bit Timer/Counter 0, 1
Mar. 2005 Ver 0.2
47