參數(shù)資料
型號(hào): W925C625
英文描述: Telephone Controller
中文描述: 電話控制器
文件頁(yè)數(shù): 23/71頁(yè)
文件大小: 1055K
代理商: W925C625
W925E/C625
8-bit CID Microcontroller
FSKE: Enable FSK demodulation circuit.
CASE: Enable Dual Tone Alert Signal detection circuit.
DTMFE: Enable DTMF demodulation circuit.
Revision : A6
-23-
Release Date : 2002/7/2
FSK DATA REGISTER
(initial=XXH)
Bit:
Mnemonic: FSKDR
7
6
5
4
3
2
1
0
FD7
FD6
FD5
FD4
FD3
FD2
Address: B4h
FD1
FD0
FD7-0: 8 bits FSK demodulated data.
DTMF DATA REGISTER
(initial=XXH)
Bit:
Mnemonic: DTMFDR
7
6
5
4
3
2
1
0
CASH
CASL DTMFH DTMFL
DD3
DD2
Address: B5h
DD1
DD0
CASH: Set when Dual Tone Alert Signal high tone is detected.
CASL:
Set when Dual Tone Alert Signal low tone is detected.
DTMFH: Set when DTMF high tone is detected.
DTMFL: Set when DTMF low tone is detected.
DD3-0: 4 bits DTMF demodulated data.
DTMF PRESENT TIME REGISTER
(initial=19H)
Bit:
Mnemonic: DTMFPT
7
6
5
4
3
2
1
0
DPT7
DPT6
DPT5
DPT4
DPT3
DPT2
Address: B6h
DPT1
DPT0
The clock period of guard-time timer is 0.8582mS. The default DTMF present time is 21.45mS.
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)
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