Rainbow Electronics DS2130Q - Manual

E Copyright 1995 by Dallas Semiconductor Corporation.
All Rights Reserved. For important information regarding
patents and other intellectual property rights, please refer to
Dallas Semiconductor data books.
DS2130Q
Voice Messaging Processor
DS2130Q
041295 1/22
FEATURES
•
Per-channel voice messaging processor for digitized
voice storage and retrieval
•
High fidelity speech recording and playback at 8, 12,
16, 24 and 32 Kbits/sec
•
Integral DTMF transceiver for remote touch-tone con-
trol and dialing
•
Connects to popular PCM codec/filters for analog in-
terfacing
•
Direct PCM serial data bus interfaces to any of 32 pos-
sible TDM time slots
•
Monitors and reports audio energy levels for call prog-
ress and voice detection
•
Selectable beep generator for sound prompts
•
3-wire synchronous serial control port
•
28-pin DIP or PLCC (DS2130Q) packages
PIN ASSIGNMENT
27 26 28 4 3 2 5
6
7
8
9
A0
DT0 PCMFS
PCMOUT
SDI
SCLK
CPXOUT
DT2
A1
A2
A3
A4
A5
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28 DT1
TM0
TM1
DT0
A0
A1
A2
A3
A4
A5
SPS
MCLK
GND DT3
CPXIN
CPXCLK
CPXFS
DT2
CPXOUT
SCLK
SDI
PCMOUT
PCMFS
PCMCLK
PCMIN
Vcc
TM1 TM0 RST DT1 VCC PCMIN PCMCLK
CPXFS CPXCLK CPXIN DT3 GND MCLK SPS
12 13 14 15 16 17 18
CS
CS
RST
25
24
23
22
21
20
19
10
11
DESCRIPTION
The DS2130 Voice Messaging Processor is a CMOS
DSP processor that serves as a voice messaging en-
gine for digitized voice storage and retrieval applica-
tions. It offers half-duplex speech compression or ex-
pansion at either 8, 12, 16, 24 or 32 Kbits/sec. The
advanced speech compression algorithm maintains ex-
cellent audio clarity even at low bit rates. The algorithm
also incorporates a DTMF transceiver for decoding or
generating touch-tone signals for remote control and
automatic dialing. The tone generator can be used to
create single-tone beeps used in popular answering
machines. Voice and call progress detection can be
easily implemented using the energy threshold detect
outputs. The DS2130 can be used together with a low-cost co-
dec/filter device for analog interfacing in standalone
applications such as answering machines or feature
phones. It can also interface directly to a serial PCM bus
on any of up to 32 possible time slots using an internal
software-selectable time slot assigner circuit (TSAC).
This configuration can be used in digital switching sys-
tems for adding voice messaging services to existing
backplane designs.
Applications include digital answering machines, em-
bedded voice response, speech annunciators, voice
mail, key telephone systems and automatic operator
services.