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CS6422-CS Datasheet(PDF) 2 Page - Cirrus Logic

Part No. CS6422-CS
Description  Enhanced Full-Duplex Speakerphone IC
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Maker  CIRRUS [Cirrus Logic]
Homepage  http://www.cirrus.com
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CS6422
2
TABLE OF CONTENTS
1. CHARACTERISTICS AND SPECIFICATIONS ........................................................................ 5
ABSOLUTE MAXIMUM RATINGS ........................................................................................... 5
RECOMMENDED OPERATING CONDITIONS ....................................................................... 5
POWER CONSUMPTION ........................................................................................................ 5
ANALOG CHARACTERISTICS ................................................................................................ 5
ANALOG TRANSMISSION CHARACTERISTICS.................................................................... 6
MICROPHONE AMPLIFIER ..................................................................................................... 6
DIGITAL CHARACTERISTICS ................................................................................................. 6
SWITCHING CHARACTERISTICS .......................................................................................... 7
2. OVERVIEW ............................................................................................................................... 9
3. FUNCTIONAL DESCRIPTION ................................................................................................. 9
3.1 Analog Interface ................................................................................................................. 9
3.1.1 Acoustic Interface ................................................................................................ 10
3.1.2 Network Interface ................................................................................................ 11
3.2 Microcontroller Interface ..................................................................................................11
3.2.1 Description .......................................................................................................... 11
3.2.2 Register Definitions ............................................................................................. 12
3.3 Register 0 ......................................................................................................................... 13
3.3.1 Mic - Microphone Preamplifier Enable .................................................................... 14
3.3.2 HDD - Half-Duplex Disable...................................................................................... 14
3.3.3 GB - Graded Beta.................................................................................................... 14
3.3.4 RVol - Receive Volume Control............................................................................... 14
3.3.5 TSD - Transmit Suppression Disable ...................................................................... 14
3.3.6 ACC - Acoustic Coefficient Control ......................................................................... 15
3.3.7 TSMde - Transmit Suppression Mode..................................................................... 15
3.4 Register 1 ......................................................................................................................... 16
3.4.1 THDet - Transmit Half-Duplex Detection Threshold ................................................ 17
3.4.2 Taps - AEC/NEC Tap Allocation ............................................................................. 17
3.4.3 TVol - Transmit Volume Control .............................................................................. 17
3.4.4 RSD - Receive Suppression Disable....................................................................... 17
3.4.5 NCC - Network Coefficient Control.......................................................................... 17
3.4.6 AuNECD - Auto re-engage NEC Disable ................................................................ 17
3.5 Register 2 ......................................................................................................................... 18
3.5.1 RHDet - Receive Half-Duplex Detection Threshold ................................................ 19
3.5.2 RSThd - Receive Suppression Threshold ............................................................... 19
3.5.3 NseRmp - Noise estimator Ramp rate .................................................................... 19
Contacting Cirrus Logic Support
For a complete listing of Direct Sales, Distributor, and Sales Representative contacts, visit the Cirrus Logic web site at:
http://www.cirrus.com/corporate/contacts/sales.cfm
Preliminary product information describes products which are in production, but for which full characterization data is not yet available. Advance product infor-
mation describes products which are in development and subject to development changes. Cirrus Logic, Inc. has made best efforts to ensure that the information
contained in this document is accurate and reliable. However, the information is subject to change without notice and is provided “AS IS” without warranty of any
kind (express or implied). No responsibility is assumed by Cirrus Logic, Inc. for the use of this information, nor for infringements of patents or other rights of third
parties. This document is the property of Cirrus Logic, Inc. and implies no license under patents, copyrights, trademarks, or trade secrets. No part of this publi-
cation may be copied, reproduced, stored in a retrieval system, or transmitted, in any form or by any means (electronic, mechanical, photographic, or otherwise)
without the prior written consent of Cirrus Logic, Inc. Items from any Cirrus Logic website or disk may be printed for use by the user. However, no part of the
printout or electronic files may be copied, reproduced, stored in a retrieval system, or transmitted, in any form or by any means (electronic, mechanical, photo-
graphic, or otherwise) without the prior written consent of Cirrus Logic, Inc.Furthermore, no part of this publication may be used as a basis for manufacture or
sale of any items without the prior written consent of Cirrus Logic, Inc. The names of products of Cirrus Logic, Inc. or other vendors and suppliers appearing in
this document may be trademarks or service marks of their respective owners which may be registered in some jurisdictions. A list of Cirrus Logic, Inc. trade-
marks and service marks can be found at http://www.cirrus.com.
CS6422
2
DS295F1




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