D6571E Ver la hoja de datos (PDF) - Unspecified

Número de pieza

componentes Descripción

Lista de partido

D6571E

EASYTAD™ Chip for an All- Digital Telephone Answering Machine with Flash Memory Interface

Unspecified 

D6571E Data Sheet

A

D6571E

EASYTAD™ Chip for an All-Digital

Telephone Answering Machine

with Flash Memory Interface

GENERAL DESCRIPTION

The D6571E chip is a digital speech/signal processing subsystem that implements all functions of TRUESPEECH® speech

compression and voice prompts, telephone line signal processing, flash memory management and True FULL Duplex

SpeakerPhone™ for an all digital answering machine. The D6571E is fully controlled by the system HOST through a

simple interface protocol. The HOST processor provides activation and control of all system functions such as speech

recording and playback, DTMF and call progress tone detection, DTMF and tone generation, and voice prompting.

The fully digital solution has no moving parts, yielding high reliability. The chip’s programmability enables a full range of

answering, recording and playback features for the end user. The D6571E is a single-chip, digital signal processor that

includes all of the necessary circuitry to interface with an external HOST, flash memory, and codec.

FEATURES

• Superior quality TRUESPEECH® Triple Rate Codertm

allowing selectable 11, 15 or 25 minutes of recording

time per each 4 Mbit Flash Memory

• PCM Recording

• Flexible storage of incoming messages (ICM),

outgoing messages (OGM). Supports multiple OGMs

and multiple mailboxes.

• TRUESPEECH®, natural-sound voice prompting, for

Day/Time stamp and voice instructions

• FLEXISPEECH™ variable speed, natural sound

playback (50% - 200%)

• DTMF generation and detection with near-end echo

cancellation for superior performance

• Extended DTMF detection (A, B, C, D)

• Automatic Gain Control

• True FULL Duplex SpeakerPhone™ with both

acoustical and near-end echo cancellation

• Caller ID and Call Waiting CID demodulation (both

Bell 202 and V.23)

• FSK modem for CID andα-5 support

• Supports 4 Mb or 16 Mb Flash Memory Devices

• Supports Time Stamp (message tag) modification

• Programmable DTMF, CPT, VOX, CAS, and FSK

Detectors Sensitivity

• Digital Volume Control

• µ-law and A-law codec support, selectable Master

and Slave mode, selectable sampling rate.

• General Purpose (CID) and Non-Erasable Storages

MIC

SPEAKER

TEL

LINE

SpeakerPhone

Codec

Codec

I/O Codec

HOST

Controlle

r

D6571E

DSP

Speech

Processor

Voice

Prompt

ROM **

16 Mbit

Flash

OR

4 Mbit

Flash

Voice Prompt

*

4 . . 16

Figure 1. D6571E Block Diagram

* Dashed lines indicate optional implementation

** Only supported with single 4Mbit Flash or no

All specifications are subject to change without prior notice

DS6571E.2

DSP GROUP, INC., 3120 SCOTT BOULEVARD

5

SANTA CLARA, CA 95054 PH: 408 986-4300 FAX: 408 986-4490

Share Link: