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參數(shù)資料
| 型號(hào)： | AS2578 |
| 廠商： | AUSTRIAMICROSYSTEMS AG |
| 英文描述： | TELEPHONE CONTROLLER WITH 13 MEMORIES AND 2-WIRE BUS |
| 中文描述： | 電話控制器與13個(gè)記憶和2線總線 |
| 文件頁數(shù)： | 6/22頁 |
| 文件大小： | 280K |
| 代理商： | AS2578 |
Data Sheet
Rev. 3
6
AS2578 /B
March 1997
data transmission and await the stop condition to return
to the standby power mode.
data
change
data
stable
SDA
SCL
Figure 1 Data Validity
start
bit
stop
bit
SDA
SCL
Figure 2 Definition of Start and Stop
SCL from
master
Data out
from Tx
Data out
from Rx
1
8
9
start
acknowledge
Figure 3 Acknowledge Response From Receiver
Frequency Comparator
The frequency comparator monitors that the ring signal
is in the limits as shown in figure 4.
Tone Generator
The tone generator incorporates the DTMF tones and 3
basic frequencies for the tone ringer.
DTMF
The DTMF generator provides 8 frequencies, namely:
Low group
Row 1
Row 2
Row 3
Row 4
697 Hz
770 Hz
852 Hz
941 Hz
High group
Col. 1
Col. 2
Col. 3
Col. 6
1209 Hz
1336 Hz
1477 Hz
1633 Hz
(AS2578B only)
The MF tones are in accordance with CEPT
recommendations.
Tone Ringer (Melody)
The three basic frequencies of the melodies are:
F1 = 800 Hz, F2 = 1067 Hz, and F3 = 1333 Hz (
±
5%).
The repetition rate can be set via key procedures or by
pin options as follows:
LM code
Repetition rate
1 time
4 times
7 times
10 times
1
2
(default)
3
4
(50 ms pause)
Repetition rate means that a sequence of 6 frequencies
is repeated 1 to 10 times within 1 sec. For LM code 1 a
pause of 50 ms is inserted between the frequencies to
allow a better recognition of the melodies.
The sequence of the frequencies is controlled by the
sequence register as follows:
Sequence
F1 F2 F3 F1 F2 F3 …
The volume of the melodies (MO output) can be set as
follows:
LM code
Volume
Steps
1
2
3
4
- 17.5 dB
- 11.5 dB
- 5.5 dB
0 dB
6 dB
6 dB
5.5 dB
(default)
When a continious valid ring signal is present for 80 ms,
the melody generator is activated and remains active
until two or more periods of the ring signal are missing.
Ring
frequency
20
30
40
50
60
(Hz)
DETECT
MUST
Tol.
70
Figure 4 Detection Window of Ringing Signal
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| AS2578B | TELEPHONE CONTROLLER WITH 13 MEMORIES AND 2-WIRE BUS |
| AS2578BN | TELEPHONE CONTROLLER WITH 13 MEMORIES AND 2-WIRE BUS |
| AS2578BP | TELEPHONE CONTROLLER WITH 13 MEMORIES AND 2-WIRE BUS |
| AS2578N | TELEPHONE CONTROLLER WITH 13 MEMORIES AND 2-WIRE BUS |
| AS2578P | TELEPHONE CONTROLLER WITH 13 MEMORIES AND 2-WIRE BUS |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| AS2578B | 制造商:AMSCO 制造商全稱:austriamicrosystems AG 功能描述:TELEPHONE CONTROLLER WITH 13 MEMORIES AND 2-WIRE BUS |
| AS2578BN | 制造商:AMSCO 制造商全稱:austriamicrosystems AG 功能描述:TELEPHONE CONTROLLER WITH 13 MEMORIES AND 2-WIRE BUS |
| AS2578BP | 制造商:AMSCO 制造商全稱:austriamicrosystems AG 功能描述:TELEPHONE CONTROLLER WITH 13 MEMORIES AND 2-WIRE BUS |
| AS2578N | 制造商:AMSCO 制造商全稱:austriamicrosystems AG 功能描述:TELEPHONE CONTROLLER WITH 13 MEMORIES AND 2-WIRE BUS |
| AS2578P | 制造商:AMSCO 制造商全稱:austriamicrosystems AG 功能描述:TELEPHONE CONTROLLER WITH 13 MEMORIES AND 2-WIRE BUS |
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