GMS81C2112 Datasheet, PDF (54/107 Pages) Hynix Semiconductor – HYNIX SEMICONDUCTOR 8-BIT SINGLE-CHIP MICROCONTROLLERS

GMS81C2112/GMS81C2120
12.2 16-bit Timer / Counter Mode
The Timer register is being run with 16 bits. A 16-bit timer/
counter register T0, T1 are increased from 0000_H until it
matches TDR0, TDR1 and then resets to 0000_H. The
match output generates Timer 0 interrupt not Timer 1 in-
terrupt.
The clock source of the Timer 0 is selected either internal
or external clock by bit T0CK[2:0].
In 16-bit mode, the bits T1CK[1:0] and 16BIT of TM1
should be set to "1" respectively.
TM0
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
TM1
7
6
5
4
3
2
1
0
POL 16BIT PWM1E CAP1 BT1TCKL1T1CK0 T1CN T1ST
X1
0
0
1
1
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
÷
 ₀₁₁
÷
 ₁₀₀
÷
512 ₁₀₁
÷
2048 ₁₁₀
MUX
0
1
T0CN
TIMER 0 + TIMER 1 → TIMER 0 (16-bit)
T0ST
0: Stop
1: Clear and start
T1 + T0
(16-bit)
clear
Comparator
TDR1 + TDR0
(16-bit)
Higher byte Lower byte
COMPARE DATA
T0IF
F/F
TIMER 0
INTERRUPT
(Not Timer 1 interrupt)
T0O PIN
Figure 12-7 16-bit Timer/Counter
48
JUNE. 2001 Ver 1.00