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參數(shù)資料
| 型號： | AS2574BP |
| 廠商： | AUSTRIAMICROSYSTEMS AG |
| 元件分類： | 無繩電話/電話 |
| 英文描述： | 20 NUMBER ONE TOUCH DIALLER WITH SERIAL BUS FOR DISPLAY DRIVER |
| 中文描述： | TELEPHONE DIALER CKT, PDIP28 |
| 封裝： | 0.600 INCH, PLASTIC, DIP-28 |
| 文件頁數(shù)： | 8/24頁 |
| 文件大?。?/td> | 191K |
| 代理商： | AS2574BP |
Data Sheet
AS2574B
Rev. 1
8
Jan. 1995
Diode Options
System Considerations
The device is intended to be used in telephone instru-
ments, that are permanently on-line, i.e. also when on-
hook the circuit is connected to the telephone line, but in
standby mode (idle) and hence only drawing a small
leakage current from the line.
This implementation offers new features like electronic
hook switch and call progress monitoring (on-hook
dialling).
Call progress monitoring (CPM) means pressing the
LS
key will switch the telephone on from standby (direct
′wake-up′from keyboard) and will present the dialling
tones via a loudspeaker without lifting the handset.
Furthermore, it is also possible to invoke the CPM by
pressing the
LNR
,
MEM
or
M1
-
9
when the ACP
(Automatic Call Progress) is activated (diode 5).
Option
Column
Function
No diode
diode
NoP
1
Number of Pulses
Standard
1
2
3
4
5
6
7
8
9
10
NZ
9
8
7
6
5
4
3
2
1
10
Digit 1
2
3
4
5
6
7
8
9
0
FT
2
Flash Time
101.2 ms
600 ms
MS
3
Memory Size
10
20
M/B
4
Make/Break Ratio
33/66 ms
40/60 ms
ACP
5
Automatic Call Progress
no
yes
MODE
6
Default Signalling Mode
MF
LD
Procedure Principles
The procedures for utilizing the features of the device are
optimized out of consideration for the human factor
in order to:
- meet the user′s expectations
- be easy to learn and relearn
- not invoke any automatic functions which the user
doesn’t expect
- protect the user from committing critical errors, e.g.
dialling wrong numbers, deleting stored numbers, etc.
- be consistent, simple and usable.
1
2
3
4
5
6
Columns
Row 5
MODE
ACP
M/B
MS
FT
NoP
The diode options
are scanned by
POR and low to
high transition on
HS.
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