HMS81C2012A Datasheet, PDF (51/107 Pages) List of Unclassifed Manufacturers – CMOS Single-Chip 8-Bit Microcontroller with A/D Converter & VFD Driver

HMS81C2012A/2020A
12.1 8-bit Timer / Counter Mode
The HMS81C20xxA has two 8-bit Timer/Counters, Timer
0, Timer 1 as shown in Figure 12-2.
The "timer" or "counter" function is selected by mode reg-
isters TMx as shown in Figure 12-1 and Table 12-1. To use
as an 8-bit timer/counter mode, bit CAP0 of TM0 is
cleared to "0" and bits 16BIT of TM1 should be cleared to
“0”(Table 12-1).
TM0
TM1
7
6
5
4
3
2
1
0
-
- CAP0 T0CK2 BT0TCKL1T0CK0 T0CN T0ST
-
-
0
X
X
XX
X
ADDRESS: 0D0_H
INITIAL VALUE: --000000_B
X means don’t care
7
6
5
4
3
2
1
0
POL 16BIT PWM1E CAP1 BT1TCKL1T1CK0 T1CN T1ST
X0
0
0
X
X
X
X
ADDRESS: 0D2_H
INITIAL VALUE: 00_H
X means don’t care
EC0 PIN
XIN PIN
EDGE
DETECTOR
T0CK[2:0]
111
÷ 2 ₀₀₀
÷4
001
÷8
010
÷ 32 ₀₁₁
÷ 128
100
÷ 512
101
÷ 2048 ₁₁₀
MUX
T0CN
TIMER 0
T0ST
0: Stop
1: Clear and start
T0 (8-bit)
clear
Comparator
TDR0 (8-bit)
T0IF
F/F
TIMER 0
INTERRUPT
T0O PIN
T1CK[1:0]
11
÷1
00
÷2
01
÷ 8 ₁₀
MUX
T1CN
TIMER 1
T1ST
0: Stop
1: Clear and start
T1 (8-bit)
clear
Comparator
TDR1 (8-bit)
T1IF
F/F
TIMER 1
INTERRUPT
T1O PIN
Figure 12-2 8-bit Timer/Counter 0, 1
SEP. 2004 Ver 2.00
47