參數(shù)資料
型號(hào)： D6571E
廠商： Electronic Theatre Controls, Inc.
英文描述： Chip for an All-Digital Telephone Answering Machine with Flash Memory Interface
中文描述： 芯片的全數(shù)字電話應(yīng)答機(jī)與快閃記憶體介面
文件頁數(shù)： 5/117頁
文件大?。?/td> 551K
代理商： D6571E
D6571E Data Sheet
A
DS6571E.2
DSP GROUP, INC., 3120 SCOTT BOULEVARD
SANTA CLARA, CA 95054 PH: 408 986-4300 FAX: 408 986-4490
5
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 T
RUE
S
PEECH
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 T
RUE
S
PEECH
Triple Rate Coder
tm
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.
T
RUE
S
PEECH
, natural-sound voice prompting, for
Day/Time stamp and voice instructions
F
LEXI
S
PEECH
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)
Figure 1. D6571E Block Diagram
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 and
α
-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
D6571E
* Dashed lines indicate optional implementation
** Only supported with single 4Mbit Flash or no
D6571E
DSP
Speech
Processor
Codec
I/O Codec
HOST
Controlle
TEL
LINE
OR
16 Mbit
Flash
4 Mbit
Flash
Voice Prompt
*
4 . . 16
Voice
Prompt
MIC
SPEAKER
SpeakerPhone
Codec
All specifications are subject to change without prior notice
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