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參數(shù)資料
| 型號(hào)： | AS2578P |
| 廠商： | AUSTRIAMICROSYSTEMS AG |
| 元件分類： | 無(wú)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, PDIP28 |
| 封裝： | 0.600 INCH, PLASTIC, DIP-28 |
| 文件頁(yè)數(shù)： | 1/22頁(yè) |
| 文件大?。?/td> | 280K |
| 代理商： | AS2578P |
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Data Sheet
Rev. 3
1
AS2578 /B
March 1997
TELEPHONE CONTROLLER WITH
13 MEMORIES AND 2-WIRE BUS
Key Features
K
Low operating voltage
K
Low current consumption, standby
≤
0.1
μ
A
K
Oscillator using Xtal or ceramic resonator (3.58 MHz)
K
Serial interface to external EEPROM
K
Consistent, simple and usable procedures
K
The settings are programmed via the keyboard and
stored in EEPROM or set by pin options
Dialler:
K
Data protection with 20 digit FIFO
K
Sliding cursor protocol with comparison
K
Automatic pause generation
K
Temporary MF select via keyboard
K
30 digit LNR (Last Number Redial)
K
13 x 20 digit memory (RAM) on chip
Tone Ringer:
K
Ring frequency discrimination
K
3 tone melody with 4 different repetition rates
K
Volume of melodies can be set in 4 steps
Block Diagramme
General Description
The AS2578 /B are a versatile repertory LD/MF diallers
with a melody generator, a ring frequency discriminator
and a 2-wire interface to EEPROM. Together with the
AS2520/1, the AS2578 /B form a coherent basis for a
fully electronic telephone with a wide range of options.
The AS2578 /B are especially designed to adapt to
different PTT specifications. A RAM is on chip for last
number redial, 3 direct dial and 10 numbers with
abbreviated dialling. To allow easy use under a PABX,
the device incorporates automatic pause insertion and
sliding cursor procedure as selectable options (AS2578)
or centrex keys (AS2578B). The device can be used with
or without EEPROM as appropriate. When an EEPROM
is connected, all RAM content is stored in the EEPROM
by power loss.
The circuit provides the possibility to set different modes
of operation (LM codes) via the keyboard or via pin
options, e.g. default signalling mode, automatic pause
insertion, flash or ground loop and settings of volume
and melodies.
Austria Mikro Systeme International
KEYSCAN
HOOK
STATE
CONTROL
DIAL
DTMF
MELODY
SERIAL
INTERFACE
RING
FREQUENCY
DETECTOR
POR
OSCILLATOR
REDIAL
13 X 20
1 X 30
RAM
FIFO
*
0
8
7
#
9
2
5
4
1
3
6
R
MUTE
SET
LNR
3.58 MHz
DP
GL
MUTE
SCL
SDA
FCI
MF
MO
MASK
HS
CE
MODE
AP (AS2578 only)
MV
RR
AS2578 /B
Vss V
DD
MEM
M1
M2
M3
D
C
B
A
(AS2578B)
Package
Available in 28 pin DIP and PLCC.
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