GMS81C7216 Datasheet, PDF (49/121 Pages) List of Unclassifed Manufacturers – 8-BIT SINGLE-CHIP MICROCONTROLLERS

GMS81C7208/7216
13.1 8-bit Timer / Counter Mode
The GMS81C7208/16 has four 8-bit Timer/Counters, timer 0,
timer 1, timer 2, timer 3 which are shown in Figure 13-3, Figure
13-4.
The “timer” or “counter” function is selected by control registers
TMn. To use as an 8-bit Timer/Counter mode, CAP0, CAP1 and
16BIT0 bits should be cleared to “0”. These timers have each 8-
bit count register and data register. The count register is increased
by every internal or external clock input. The internal clock has a
prescaler divide ratio option of 2~2048 selected by control bits of
register TMn (n=0,1,2,3).
TM0
7
6
5
4
3
2
1
0
-
- CAP0 T0CK2 TB0TCCKL1 T0CK0 T0CN T0ST
X
X
0
X
X
X
X
X
ADDRESS: 0E0_H
INITIAL VALUE: 00_H
TM1
- 16BIT0
X
0
EC0 PIN
Edge Detector
T0CK[2:0]
111
SCMR[1:0]
f_XIN
0X
reserved ^1X
÷ 2048
÷ 512
÷ 128
÷ 32
÷8
÷4
÷2
110
101
100
011
010
001
000
MUX
- CAP1 TB1TCCKL1 T1CK0 T1CN T1ST
0
0
X
X
X
X
X means don’t care
ADDRESS: 0E2_H
INITIAL VALUE: 00_H
0
1
T0CN
T0ST
0: Stop
1: Clear and start
T0 (8-bit)
[0E1_H]
clear
Comparator
T0IF
TDR0 (8-bit)
[0E1_H]
TIMER 0
TIMER 0
INTERRUPT
T1CK[1:0]
11
÷8
10
÷ 2 ₀₁
÷ 1 ₀₀
MUX
0
1
T1CN
T1ST
0: Stop
1: Clear and start
T1 (8-bit)
[0E4_H]
clear
Comparator
T1IF
TDR1 (8-bit)
[0E3_H]
TIMER 1
TIMER 1
INTERRUPT
Figure 13-3 8-bit Timer/Counter 0, 1
FEB. 2005 Ver 1.04
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