D6385A-11 [ETC]
Telecommunication IC ; 电信IC\n
| 型号： | D6385A-11 |
| 厂家： | 
ETC |
| 描述： | Telecommunication IC
|
| 文件： | 总4页 (文件大小：386K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
D6385A
All Digital Telephone Answering Device with True FULL Duplex
SpeakerPhone includes Slave CODEC Operation for Digital
Telephone Applications
General Description
The D6385A chip is a digital speech/signal processing subsystem that implements all functions of TRUESPEECH
speech compression and voice prompts, telephone line signal processing, memory management, FLEXISPEECH and
True FULL Duplex SpeakerPhone for an all digital answering machine. In addition, the D6385A has the ability to
operate as a CODEC, in slave mode, for use in Digital Telephone applications such as DECT. The D6385A is fully
controlled by the system Host through a simple interface protocol. The Host controller 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.
Host
Controller
Telephone
Phone
Line
Line
Interface
CODEC
Voice
Prompt
ROM
A
D6385A
DSP Speech
Processor
Speaker
Phone
Interface
CODEC
ARAM
Memory
Optional
Figure 1. D6385A System Block Diagram
Key Features
n High-quality, variable low rate TRUESPEECH digital n FLEXISPEECH variable speed, natural sound
speech compression allowing 14-15 minutes of
recording time per each 4 Mbit ARAM (Audio
Grade DRAM)
playback (50%-200%)
n Selectable Master/Slave CODEC operation
n Supports offset playback for jumps within a
message
n TRUESPEECH, natural-sound voice prompting, for
Day/Time stamp and voice instructions
n True FULL Duplex SpeakerPhone with both
acoustical and near-end echo cancellation
n Flexible storage of incoming messages (ICM),
outgoing messages (OGM). Supports multiple
OGMs and multiple mailboxes
n Programmable thresholds for VOX, DTMF, and call
progress
n DTMF generation and detection with near-end
echo cancellation for superior performance
n Digital Volume Control
n Two programmable call progress tone filters
n Simple 8-bit Host Hardware Interface
n Storage of 32 telephone numbers for speed dialing
n Easy Host software conversion from the D6305B
D6385A
AA
Device Configuration and System Components
n D6385A-11 Digital Telephone Answering Device (TAD) processor
(80-pin PQFP) 1 each
STANDARD COMPONENTS
These are supplied by the customer according to DSP Groups specifications
n D0000-29 Analog I/O Interface (16-pin DIP) 1 each, 2 for SpeakerPhone
One of the following:
ADDITIONAL SYSTEM COMPONENTS
n D0000-35B/C* - 4Mb ARAM message memory (SOJ), up to four devices
per system, or
n D0000-36B/C* - 16Mb ARAM message memory (SOJ), up to two devices
per system
n EPROM/ROM - Voice Prompt storage, each 32Kx8 device supports up to
35.4 seconds of Voice Prompts (up to 64K)
OPTIONAL SYSTEM COMPONENTS
* Note: D0000-35C or D0000-36C are required if FLEXISPEECH is desired
A
Top View
D6385A-11
MDB9
Figure 2. D6385A-11 Pin Diagram
D6385A
AA
System Functions
All of the speech processing tasks are done by the DSP Speech Subsystem. This allows the use of a very low cost
microcontroller to be used for basic control of the system. The Host need only send high level commands to perform
functions such as Record Message or Delete Message and the operation will be performed by the DSP subsystem which
will report the status of the operation to the Host. All memory interface and management will be taken care of by the
DSP requiring the Host to only handle high level system functions. A summary of the functions performed by the DSP
Speech Subsystem and Host Controller are shown in Figure 3, below.
DSP Speech Subsystem
n Speech Recording
n Speech Playback
Host Controller
n Memory / Message Management
n DTMF and Tone Genertion
n Control the System
n Read Buttons
n DTMF Detection
n Call Process Detection
n Time / Date Stamping
n Voice Prompts
n Control Displays / Switches
n Phone Number Storage
n SpeakerPhone Functions
n Slave CODEC Operation
Figure 3. System Functions
Simple Hardware Interface
The hardware interface between the D6385A and the Host Controller is a simple one requiring only an 8 bit parallel
port and 4 handshake lines. The Host writes high level Commands to the D6385A and the D6385A will respond with
Status information. Once a Command is issued the D6385A will use the ACK pin to indicate that the Status is
available to be read. The hardware interface between the D6385A and Host is shown in Figure 4 below.
8051
D6385A-11
8
Port 0
HSTD0-7
RD
WR
HSTR
HSTW
HI/LO
ACK
HI/LO
INT
Figure 4. D6385A / Host Interface
Benefits of the D6385A
n High-Quality, variable low rate TRUESPEECH
digital speech compression allowing 14-15 minutes
of recording time in 4 Mbits of ARAM
n The Host selectable thresholds for VOX, DTFM
and Call Progress allows flexibility in design for
various countries and different applications
n TRUESPEECH natural sounding voice prompts and
time/date stamping allow design of a high quality
and professional sounding product
n The True Full-Duplex SpeakerPhone capability
allow a very professional sounding SpeakerPhone to
be added to your product with a very minimal
additional cost
n Operation as a Slave CODEC
Reduces the system cost by eliminating the need
for an extra CODEC
n Allows flexibility in design for features such as
multiple mailboxes and multiple OGMs allowing
design of a product that is truly a Personal Voice
Mail System
TRUESPEECH is a registered trademark, and FLEXISPEECH and True FULL Duplex SpeakerPhone are trademarks of DSP Group, Inc. Other company and product
names mentioned in this document may be the trademark or registered trademark of their respective manufacturers.
PO-1/96
Printed in USA
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