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CS6403-IQ Datasheet(PDF) 1 Page - Cirrus Logic

Part No. CS6403-IQ
Description  Echo-Cancelling Codec
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Maker  CIRRUS [Cirrus Logic]
Homepage  http://www.cirrus.com
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Preliminary Product Information
This document contains information for a new product.
Cirrus Logic reserves the right to modify this product without notice.
1
Copyright
© Cirrus Logic, Inc. 1997
(All Rights Reserved)
Cirrus Logic, Inc.
Crystal Semiconductor Products Division
P.O. Box 17847, Austin, Texas 78760
(512) 445 7222 FAX: (512) 445 7581
http://www.crystal.com
CS6403
Echo-Cancelling Codec
Features
l Applicable in:
- Digital-Cellular Hands-Free Phones
- Analog-Cellular Hands-Free Phones
- Office Speaker Phones
- Desktop & Video Teleconferencing
l Echo Cancellation
- Up to 60 dB ERLE
- 512 Tap (64 ms at 8 kHz sampling rate)
- Split Mode For Two Echo Cancellers
l Serial Data/Control Interface
l On-Chip Delta-Sigma Codec
- < 1% THD, 8
Ω Load On Output
- > 70 dB S/(N+D) on Input
- 300-3600 Hz Bandwidth (8 kHz sampling rate)
- Volume Control
- Microphone Preamp
l Automatic Gain Control (AGC)
l No Training Signals Generated
Description
The CS6403 is an application-specific digital signal pro-
cessor optimized for network and acoustic echo
cancellation applications. A high-quality codec is inte-
grated with the processor to provide a complete, low-
cost echo-cancellation solution.
The CS6403 is a fully independent processor that re-
quires no signal processing support to implement its
cancellation functions. Volume control, AGC, and sleep
functions are also provided.
The on-chip ADC and DAC employ over-sampling tech-
nology, which eliminates the need for complex external
anti-aliasing and reconstruction filters, further reducing
system cost.
The CS6403 has a serial interface that is compatible with
most DSPs and PCM codecs. Clock and sync lines con-
trol the transfer of serial data via the separate serial data-
in and data-out pins. Both 16-bit audio data and con-
trol/status information may be multiplexed on this serial
channel using a steering bit.
ORDERING INFORMATION
CS6403-IQ
-40° to +85° C 44-pin TQFP
CS6403-IL
-40° to +85° C 44-pin PLCC
CDB6403
Evaluation Board
I
RESET
DVDD0
1
CONFIG
GPIN0
RESERVED0
6
CLKIN CLKOUTSCLK_RATE0
PVDD
SPKROUTP
SPKROUTN
PGND0
PGND1
MICIN
VCM
SCLK_RATE1
PLL + Clock Manager
CLK_SEL
NC
GPIN1
GPIN3
GPIN2
GPOUT0
GPOUT1
SFRAME
UALAW
SMASTER
SSYNC
SCLK
SDO_1
SYNCOUT
SDI_A
AVDD
DGND0
1
AGND0
1
DSP
Control
Status
A
G
C
High
Pass
Control
Nonlinear
Echo
Control
Volume
Control
Echo Cancellers
Nonlinear
Echo
Control
High
Pass
A
T
T
E
N
VREF
A
T
T
E
N
D/A
A/D
26 dB
Analog I/O
MAR ‘96
DS192PP7




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