AS2578P datasheet, PDF - EEWORLD Datasheet

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AS2578P: Descriptiontelephone controller with 13 memories and 2-wire bus; File Size280KB，22 Pages; ManufacturerAMSCO [Austria micro systems AG]

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AS2578P Overview

telephone controller with 13 memories and 2-wire bus

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Data Sheet

AS2578 /B

Austria Mikro Systeme International

TELEPHONE CONTROLLER WITH

13 MEMORIES AND 2-WIRE BUS

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.

Key Features

Low operating voltage

Low current consumption, standby

≤

0.1

µA

Oscillator using Xtal or ceramic resonator (3.58 MHz)

Serial interface to external EEPROM

Consistent, simple and usable procedures

The settings are programmed via the keyboard and

stored in EEPROM or set by pin options

Dialler:

Data protection with 20 digit FIFO

Sliding cursor protocol with comparison

Automatic pause generation

Temporary MF select via keyboard

30 digit LNR (Last Number Redial)

13 x 20 digit memory (RAM) on chip

Tone Ringer:

Ring frequency discrimination

3 tone melody with 4 different repetition rates

Volume of melodies can be set in 4 steps

Package

Available in 28 pin DIP and PLCC.

Block Diagramme

Vss V

(AS2578B)

MUTE

SET

LNR

MEM

MODE

KEYSCAN

POR

HOOK

STATE

3.58 MHz

OSCILLATOR

CONTROL

AP (AS2578 only)

MASK

MUTE

DIAL

REDIAL

DTMF

MELODY

SCL

SERIAL

INTERFACE

SDA

13 X 20

1 X 30

RAM

FIFO

RING

FREQUENCY

DETECTOR

FCI

AS2578 /B

Rev. 3

March 1997

AS2578P Related Products

	AS2578P	AS2578N	AS2578B	AS2578	AS2578BP	AS2578BN
Description	telephone controller with 13 memories and 2-wire bus	telephone controller with 13 memories and 2-wire bus	telephone controller with 13 memories and 2-wire bus	telephone controller with 13 memories and 2-wire bus	telephone controller with 13 memories and 2-wire bus	telephone controller with 13 memories and 2-wire bus

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