參數資料
型號: GMS81516B
廠商: Hynix Semiconductor Inc.
元件分類: 8位微控制器
英文描述: 8-BIT SINGLE-CHIP MICROCONTROLLERS
中文描述: 8位單晶片微控制器
文件頁數: 45/110頁
文件大?。?/td> 1980K
代理商: GMS81516B
GMS81508B/16B/24B, GMS82512/16/24
42
MAY. 2001 Ver 2.0
Note:
The contents of Timer data register TDRx should be
initialized 1
H
~FF
H
, not 0
H
, because it is undefined after re-
set.
In the Timer 0, timer register T0 increments from 00
H
until
it matches TDR0 and then reset to 00H. The match output
of Timer 0 generates Timer 0 interrupt (latched in T0IF bit)
As TDRx and Tx register are in same address, when read-
ing it as a Tx, written to TDRx.
In counter function, the counter is increased every 1-to-0
(falling edge) transition of EC0 or EC2 pin. In order to use
counter function, the bit 4, bit 5 of the Port mode register
PMR4 are set to “1”. The Timer 0 can be used as a counter
by pin EC0 input, but Timer 1 can input by internal clock.
Similarly, Timer 2 can be used by pin EC2 input but Timer
3 can not.
EC2 are NOT served on GMS825xx.
Figure 11-3 8-bit Timer/Counter 2, 3
Example 3:
Timer2 = 8-bit timer mode, 2ms interval at 8MHz
Timer3 = 8-bit timer mode, 500us interval at 8MHz
LDM
LDM
LDM
SET1
SET1
EI
TDR2,#250
TDR3,#250
TM2,#0110_1111B
T2E
T3E
Example 4:
Timer2 = 8-bit event counter mode
Timer3 = 500us 8-bit timer mode at 8MHz
LDM
LDM
LDM
SET1
SET1
EI
TDR2,#250
TDR3,#250
TM2,#0110_1100B
T2E
T3E
EC2 PIN
÷
4
÷
16
÷
64
XIN PIN
MUX
P
T2IF
clear
0: Stop
1: Clear and start
T2ST
T2SL[1:0]
00
01
10
11
TIMER 2
INTERRUPT
T2CN
MUX
T3IF
clear
0: Stop
1: Clear and start
T3ST
T3SL[1:0]
01
10
11
TIMER 3
INTERRUPT
÷
4
÷
16
÷
64
TDR2 (8-bit)
TDR3 (8-bit)
T3 (8-bit)
T2 (8-bit)
Comparator
Comparator
TIMER 2
TIMER 3
T3O PIN
F/F
BTCL
T2ST
7
6
5
4
3
2
1
0
T3ST
CAP2
T2SL1
INITIAL VALUE: 00
H
ADDRESS: 0E3
H
TM2
T2SL0
T2CN
T3SL1 T3SL0
0
X
X
X
X
X
X means don’t care
01 or 10 or 11
Edge Detector
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