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參數(shù)資料
| 型號： | AS2578BN |
| 廠商： | AUSTRIAMICROSYSTEMS AG |
| 元件分類： | 無繩電話/電話 |
| 英文描述： | TELEPHONE CONTROLLER WITH 13 MEMORIES AND 2-WIRE BUS |
| 中文描述： | TELEPHONE MULTIFUNCTION CKT, PQCC28 |
| 封裝： | PLASTIC, LCC-28 |
| 文件頁數(shù)： | 2/22頁 |
| 文件大小： | 280K |
| 代理商： | AS2578BN |
Data Sheet
Rev. 3
2
AS2578 /B
March 1997
Pin Description
Pin #
Symbol
Function
1
2
3
4
C4
C3
C2
C1
Keyboard Columns
5
HS
Hook Switch Input
This input is active high with internal pull-down resistor.
6
MODE
Signalling (LD/MF) Default Mode Select Input
Mode pin
High
Open
Low
Function
LD default mode, make/break pulse 33/66 ms
MF only
LD default mode, make/break pulse 40/60 ms
7
CE
Chip Enable Input
This input is active high with internal pull-down resistor and is used to initiate setup
procedures.
8
9
OSC2
OSC1
Oscillator Input
Oscillator Output
Oscillator pins for Xtal or ceramic resonator (3.58 MHz). When a ceramic resonator is used
a capacitor (10 - 22 pF) must be connected from each of the oscillator pins to V
SS
.
10
Vss
Negative Power Supply
11
TONE
DTMF Tone Output
The dual tones provided at this output have a level independent of the supply voltage in
the operating range from 2.5 to 5.5V.
13
SDA
Serial Data I/O
SDA is a bidirectional pin with an open drain with internal pull-up resistor and is used to
transfer data into and out of a compatible EEPROM.
Serial Clock Line Output
The SCL output is an open drain with internal pull-up resistor and is used to clock data into
and out of a compatible EEPROM.
14
SCL
15
FCI
Frequency Comparator Input
Schmitt trigger input for ring frequency discrimination.
12
MO
Melody Generator Output
Melodies for tone ringing are generated on this output. The output signal is PDM.
16
MUTE
Mute Output
This push-pull output is high during dialling and when mute key has been activated,
otherwise low.
17
MASK
Mask Output
This push-pull output is high during pulsing (make and break periods).
Continues…
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相關(guān)代理商/技術(shù)參數(shù) |
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| 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 |
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| 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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