GMS81C2012/GMS81C2020
HYUNDAI MicroElectronics
12.1 8-bit Timer / Counter Mode
The GMS81C20xx has two 8-bit Timer/Counters, Timer 0,
Timer 1 as shown in Figure 12-2.
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).
The "timer" or "counter" function is selected by mode reg-
isters TMx as shown in Figure 12-1 and Table 12-1. To use
7
-
6
-
5
4
3
2
1
0
ADDRESS: 0D0H
INITIAL VALUE: --000000B
TM0
TM1
CAP0 T0CK2 BT0TCKL1T0CK0 T0CN T0ST
0
X
-
-
X
X
X
X
X means don’t care
7
6
5
4
3
2
1
0
ADDRESS: 0D2H
INITIAL VALUE: 00H
POL 16BIT PWM1E CAP1 BT1TCKL1T1CK0 T1CN T1ST
0
0
X
0
X
X
X
X
X means don’t care
T0CK[2:0]
EDGE
DETECTOR
EC0 PIN
XIN PIN
111
000
T0ST
0: Stop
1: Clear and start
2
÷ꢀ
4
÷ꢀ
÷ꢀ
001
010
011
8
T0 (8-bit)
÷ꢀꢁꢂ
clear
÷ꢀꢃꢂꢄ
100
101
TIMER 0
INTERRUPT
512
T0CN
÷ꢀ
÷ꢀ
T0IF
F/F
Comparator
2048
110
TIMER 0
TDR0 (8-bit)
MUX
T0O PIN
T1CK[1:0]
11
T1ST
0: Stop
1: Clear and start
1
÷ꢀ
00
01
10
T1 (8-bit)
2
÷ꢀ
÷ꢀ
clear
8
TIMER 1
INTERRUPT
T1CN
T1IF
F/F
MUX
Comparator
TIMER 1
TDR1 (8-bit)
T1O PIN
Figure 12-2 8-bit Timer/Counter 0, 1
50
MAR. 2000 Ver 1.00
HYNIX [ HYNIX SEMICONDUCTOR ]
