ZL38002DGB1 datasheet, PDF - EEWORLD Datasheet

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ZL38002DGB1: DescriptionLow-Voltage Acoustic Echo Canceller With Noise Reduction; File Size425KB，47 Pages; ManufacturerZarlink Semiconductor (Microsemi); Websitehttp://www.zarlink.com/

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ZL38002DGB1 Overview

Low-Voltage Acoustic Echo Canceller With Noise Reduction

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ZL38002

Low-Voltage Acoustic Echo Canceller

with Noise Reduction

Data Sheet

Features

•

112 ms acoustic echo canceller

Up to 12 dB of noise reduction

Works with low cost voice codec. ITU-T G.711 or

signed mag

µ/A-Law,

or linear 2’s compliment

Each port may operate independently in

companded format or linear format

Advanced NLP design - full duplex speech with

no switched loss on audio paths

Fast re-convergence time: tracks changing echo

environment quickly

Adaptation algorithm converges even during

Double-Talk

Designed for exceptional performance in high

background noise environments

Provides protection against narrow-band signal

divergence

Howling prevention stops uncontrolled oscillation

in high loop gain conditions

Programmable offset nulling of all PCM channels

Serial micro-controller interface

Idle channel noise suppression

ST-BUS, GCI, or variable-rate SSI PCM

interfaces

•

Ordering Information

ZL38002QDG

48 Pin TQFP

ZL38002QDG1 48 Pin TQFP*

ZL38002DGA1 36 Pin QSOP*

ZL38002DGB1 36 Pin QSOP*

* Pb Free Matte Tin

-40°C to 85°C

User gain control provided for speaker path

(-24 dB to +21 dB in 3 dB steps)

Adjustable gain pads from -24 dB to +21 dB at

Xin, Sin and Sout to compensate for different

system requirements

AGC on speaker path

Handles up to -6 dB acoustic echo return loss

(with the appropriate gain pad settings)

Transparent data transfer and mute options

20 MHz master clock operation

Low power mode during PCM Bypass

Bootloadable for future factory software upgrades

2.7 V to 3.6 V supply voltage; 5 V-tolerant inputs

Trays

Tubes

Tape and Reel

August 2005

Limiter

Sin

MD1

NBSD

CONTROL

Adaptive

Filter

UNIT

Double

Talk

Detector

NBSD

Program

ROM

Program

RAM

/A-Law/

Linear

Filter

Gain

Pad

ADV

NLP

Noise

Reduction

Gain

Pad

Linear/

µ/A-Law

Sout

DATA1

DATA2

ACOUSTIC ECHO PATH

Micro

Interface

Gain

Pad

Howling

Controller

MD2

Rout

inear/

/A-Law

Limiter

SCLK

-24 -> +21dB

Filter

/A-Law/

Linear

AGC

User

Gain

Rin

VDD

VSS

RESET

FORMAT

ENA2

ENA1

LAW

F0i

BCLK/C4i

MCLK

Figure 1 - Functional Block Diagram

Zarlink Semiconductor Inc.

Zarlink, ZL and the Zarlink Semiconductor logo are trademarks of Zarlink Semiconductor Inc.

ZL38002

Table of Contents

Data Sheet

1.0 Functional Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6

1.1 Noise Reduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6

1.2 Noise Suppression . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6

1.3 Adaptation Speed Control . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

1.4 Advanced Non-Linear Processor (ADV-NLP) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

1.5 Narrow Band Signal Detector (NBSD). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

1.6 Howling Detector (HWLD)1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

1.7 Programmable High Pass Filter. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

1.8 Limiters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

1.9 User Gain . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

1.10 AGC. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

1.11 Programmable Gain Pad . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

1.12 Mute Function . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

1.13 Master Bypass. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9

1.14 AEC Bypass . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9

1.15 Adaptation Control. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9

1.16 Throughput Delay . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9

1.17 Power Down / Reset . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9

2.0 PCM Data I/O . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10

2.1 ST-BUS and GCI Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10

2.2 SSI Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13

2.3 PCM Law and Format Control (LAW, FORMAT). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14

2.4 Linear PCM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15

2.5 Bit Clock (BCLK/C4i) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15

2.6 Master Clock (MCLK) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15

3.0 Microport . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15

4.0 Bootload Process and Execution from RAM. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16

5.0 Register Summary . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20

6.0 Register Definitions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22

7.0 Electrical Characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39

Zarlink Semiconductor Inc.

ZL38002DGB1 Related Products

	ZL38002DGB1	ZL38002DGA1
Description	Low-Voltage Acoustic Echo Canceller With Noise Reduction	Low-Voltage Acoustic Echo Canceller With Noise Reduction

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