參數(shù)資料
型號： GMS87C7216Q
廠商： Electronic Theatre Controls, 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(shù)： 50/121頁
文件大?。?/td> 1645K
代理商： GMS87C7216Q
GMS81C7208/7216
46
FEB. 2005 Ver 1.04
Note:
The contents of timer data register TDRx should be
initialized with 1
H
~FF
H
, not to 0
H
, because it is not to de-
fined before reset.
In the timer 0, timer register T0 increments from 00
H
until it
matches with TDR0 and then reset to 00
H
. The match output of
timer 0 generates timer 0 interrupt (latched in T0IF bit)
As TDRx and Tx register are in same address, when reading it as
a Tx, written to TDRx.
In counter function, the counter is increased every 0-to-1 (rising
edge) transition of EC0 or EC2 pin. In order to use counter func-
tion, the bit 3 and bit 4 of the Port mode register PMR are set to
“1” by software. The Timer 0 can be used as a counter by pin EC0
input. Similarly, Timer 2 can be used by pin EC2 input.
Figure 13-4 8-bit Timer/Counter 2, 3
EC2 PIN
÷
2
÷
4
÷
8
MUX
P
T2IF
clear
0: Stop
1: Clear and start
000
001
010
TIMER 2
INTERRUPT
MUX
T3IF
clear
0: Stop
1: Clear and start
TIMER 3
INTERRUPT
÷
8
÷
2
÷
1
TDR2 (8-bit)
T3 (8-bit)
TDR3 (8-bit)
T2 (8-bit)
Comparator
Comparator
TIMER 2
TIMER 3
BTCL
T2CK1
7
6
5
4
3
2
1
0
-
CAP2
INITIAL VALUE: 00
H
ADDRESS: 0E6
H
TM2
T2CK0 T2CN T2ST
-
T2CK2
X
X
X means don’t care
0
÷
32
÷
128
÷
512
÷
2048
011
100
101
110
111
00
01
10
11
BTCL
T3CK1
-
-
INITIAL VALUE: 00
H
ADDRESS: 0E8
H
TM3
T3CK0 T3CN T3ST
16BIT1
CAP3
X
0
0
0
Edge Detector
f
XIN
reserved
0X
1X
SCMR[1:0]
X
X
X
X
X
X
X
X
X
T2CN
T2CK[2:0]
1
0
T2ST
T3ST
T3CN
1
0
T3CK[1:0]
[0E7
H
]
[0E7
H
]
[0EA
H
]
[0E9
H
]
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