參數(shù)資料
型號(hào)： W925E240
英文描述： Telephone Controller
中文描述： 電話控制器
文件頁(yè)數(shù)： 23/66頁(yè)
文件大?。?/td> 930K
代理商： W925E240
W925E/C240
8-bit CID Microcontroller
Revision : A6
-23-
Release Date : 2002/7/2
DPT7-0: The pre-set data register for counting DTMF present time. When DTMF is detected(Est
low to high), the guard timer starts to up-count from 00H. As the guard timer is equal to
the value of DTMFPT, the exist of the DTMF is accepted. Est changes to low state to
stop and reset the counter.
DTMF ABSENT TIME REGISTER
(initial=19H)
Bit:
Mnemonic: DTMFAT
7
6
5
4
3
2
1
0
DAT7
DAT6
DAT5
DAT4
DAT3
DAT2
Address: B7h
DAT1
DAT0
The clock period of guard-time timer is 0.8582mS. The default DTMF absent time is 21.45mS.
DAT7-0: The pre-set data register for counting DTMF absent time. When DTMF is absent(Est
high to low), the guard timer starts to up-count from 00H. As the guard timer is equal to
the value of DTMFAT, the finish of DTMF is recognized. Est changes to low state to
stop and reset the counter.
INTERRUPT PRIORITY
(initial=00H)
Bit:
7
-
6
5
-
4
-
3
2
1
0
PS1
PT1
PX1
PT0
PX0
Mnemonic: IP
Address: B8h
IP.7: This bit is un-implemented and will read high.
PS1: This bit defines the Serial port interrupt priority. PS1 = 1 sets it to higher priority level
PT1: This bit defines the Timer 1 interrupt priority. PT1 = 1 sets it to higher priority level.
PX1: This bit defines the External interrupt 1 priority. PX1 = 1 sets it to higher priority level.
PT0: This bit defines the Timer 0 interrupt priority. PT0 = 1 sets it to higher priority level.
PX0: This bit defines the External interrupt 0 priority. PX0 = 1 sets it to higher priority level.
DTMF GENERATOR REGISTER
(initial=00H)
Bit:
Mnemonic: DTMFG
7
-
6
5
HE
4
LE
3
L1
2
L0
1
H1
0
H0
DTGE
Address: BAh
L1
x
x
x
x
0
0
1
1
L0
x
x
x
x
0
1
0
1
H1
0
0
1
1
x
x
x
x
H0
0
1
0
1
x
x
x
x
Selected tone
1209Hz
1336Hz
1477Hz
1633Hz
697Hz
770Hz
852Hz
941Hz
LE: Enable low group frequency output.
HE: Enable high group frequency output.
DTGE: Enable dual tone output to DTMF pin.
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