Texas Instruments DEM-PCM2912A EVM User Manual
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DEM-PCM2912AEVM

User's Guide

Literature Number: SBAU141

January 2009

2

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Contents

Preface ...............................................................................................................................

7

1

Description ................................................................................................................

9

1.1

Introduction—PCM2912A ................................................................................................

10

 

1.1.1 Key Features.......................................................................................................

10

1.2

Pin Assignments and Terminal Functions ..............................................................................

11

1.3

Functional Block Diagram .................................................................................................

13

2

Getting Started .........................................................................................................

15

2.1

Electrostatic Discharge Warning .........................................................................................

16

2.2

Block Diagram ..............................................................................................................

16

2.3

Interface and Connections ................................................................................................

16

3

Set-Up Guide ...........................................................................................................

17

3.1

Basic Operating Set-Up—Windows Vista ...............................................................................

18

 

3.1.1 Basic Setup Before Evaluation ..................................................................................

18

 

3.1.2 Volume and Mute Settings .......................................................................................

19

 

3.1.3

Sampling Frequency ..............................................................................................

21

3.2

Basic Operating Set-Up—Windows XP .................................................................................

23

 

3.2.1 Basic Setup Before Evaluation ..................................................................................

23

 

3.2.2

Volume Settings ...................................................................................................

24

3.3

Basic Operating Set-Up—Mac OS.......................................................................................

27

 

3.3.1 Basic Setup Before Evaluation ..................................................................................

27

 

3.3.2

Volume Settings ...................................................................................................

29

 

3.3.3

Sampling Frequency ..............................................................................................

30

4

Evaluation and Measurements ...................................................................................

33

4.1

Measurements for Dynamic Characteristics ............................................................................

34

4.2

Playback Performance.....................................................................................................

34

4.3

Recording Performance ...................................................................................................

36

5

Schematic, PCB Layout, and Bill of Materials ...............................................................

37

5.1

Schematics..................................................................................................................

38

5.2

Printed Circuit Board Layout..............................................................................................

39

5.3

Component List.............................................................................................................

40

Important Notices...............................................................................................................

42

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List of Figures

 

1-1

PCM2912A Pin Assignments .............................................................................................

11

1-2

DEM-PCM2912A EVM Functional Block Diagram.....................................................................

13

2-1

DEM-PCM2912A EVM Block Diagram ..................................................................................

16

3-1

Sound—Playback Tab (Windows Vista).................................................................................

18

3-2

Sound—Recording Tab (Windows Vista) ...............................................................................

18

3-3

Speakers Properties—Levels Tab (Windows Vista) ...................................................................

19

3-4

Microphone Properties—Levels Tab (Windows Vista) ................................................................

20

3-5

Speakers Properties—Advanced Tab (Windows Vista)...............................................................

21

3-6

Microphone Properties—Advanced Tab (Windows Vista) ............................................................

22

3-7

Sound and Audio Devices Properties—AudioTab (Windows XP)..................................................

23

3-8

Sound and Audio Devices Properties—VolumeTab (Windows XP)................................................

24

3-9

Speaker Window for Volume Setting (Windows XP) ..................................................................

25

3-10

Sound and Audio Devices Properties—AudioTab (Windows XP)..................................................

25

3-11

Microphone Volume Windows for Record Volume Setting (Windows XP) .........................................

26

3-12

Sound—Input Tab (Mac OS) .............................................................................................

27

3-13

Sound—Output Tab (Mac OS) ...........................................................................................

28

3-14

Audio Midi Setting Window (Mac OS) ...................................................................................

29

3-15

QuickTime Audio Recording Controls ...................................................................................

30

3-16

Audio Midi Setting Window (Mac OS) ...................................................................................

31

4-1

DEM-PCM2912AEVM Configuration for Playback Performance Measurement..................................

34

4-2

DEM-PCM2912AEVM Configuration for Recording Performance Measurement when Recording Data......

36

4-3

DEM-PCM2704EVMConfiguration for Recording Performance Measurement with Recorded Data...........

36

5-1

DEM-PCM2912A EVM Schematic .......................................................................................

38

5-2

DEM-PCM2912A EVM Board Layout—Silkscreen ....................................................................

39

5-3

DEM-PCM2912A EVM Board Layout—Component Side.............................................................

39

5-4

DEM-PCM2912A EVM Board Layout—Inner View ....................................................................

39

4

List of Figures

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List of Tables

1-1

PCM2912A Terminal Functions ..........................................................................................

11

2-1

DEM-PCM2912A EVM Connectors......................................................................................

16

4-1 Line Output Playback Performance......................................................................................

35

4-2 32-Ω Headphone Output Playback Performance ......................................................................

35

4-3 16-Ω Headphone Output Playback Performance ......................................................................

35

4-4

Line Input Recording Performance.......................................................................................

36

5-1

Bill of Materials .............................................................................................................

40

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List of Tables

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List of Tables

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Preface

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About This Manual

This document provides the information needed to set up and operate the DEM-PCM2912AEVM evaluation module, a test platform for the16-bit,mono microphone input and stereo headphone output,single-chipPCM2912A stereo audio coder/decoder (codec) with a universal serial bus (USB) interface. For a more detailed description of the PCM2912A product line, refer to the product data sheet available from the Texas Instruments web site athttp://www.ti.com. Support documents are listed in the section of this guide entitledRelated Documentation from Texas Instruments.

How to Use This Manual

Throughout this document, the abbreviation EVM and the termevaluation module are synonymous with theDEM-PCM2912AEVM.

Chapter 1 gives an overview of the PCM2912A USB interface codec. The EVM block diagram and primary features are also discussed.

Chapter 2 provides general information regarding EVM handling and unpacking, absolute operating conditions, and the default switch and jumper configuration.

Chapter 3 is the hardware and software setup guide for the EVM, providing all of the necessary information needed to configure the EVM under various PC operating systems for product evaluation.

Chapter 4 discusses how to configure theDEM-PCM2912AEVM motherboard for performance evaluation using an audio analyzer.

Chapter 5 includes the EVM electrical schematic, printed circuit board (PCB) layout, and the bill of materials.

Information About Cautions and Warnings

This document contains caution statements.

CAUTION

This is an example of a caution statement. A caution statement describes a situation that could potentially damage your software or equipment.

The information in a caution or a warning is provided for your protection. Please read each caution and warning carefully.

Macintosh, QuickTime are registered trademarks of Apple Incorporated.

SYS-2722is a registered trademark of Audio Precision, Inc.

Windows, Windows Vista, Windows XP are registered trademarks of Microsoft Corporation.

All other trademarks are the property of their respective owners.

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Related Documentation From Texas Instruments

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Related Documentation From Texas Instruments

The following documents provide information regarding Texas Instruments integrated circuits used in the assembly of the DEM-PCM2912AEVM. These documents are available from theTI web site. The last character of the literature number corresponds to the document revision that is current at the time of the writing of this User’s Guide. Newer revisions may be available from the TI web site athttp://www.ti.com/ or call the Texas Instruments Literature Response Center at (800)477–8924or the Product Information Center at (972)644–5580.When ordering, identify the document(s) by both title and literature number.

Data Sheet

Literature Number

PCM2912A Product data sheet

SLES230

If You Need Assistance

If you have questions regarding either the use of this evaluation module or the information contained in the accompanying documentation, please contact the Texas Instruments Product Information Center at (972) 644–5580or visit the TI web site atwww.ti.com.

FCC Warning

This equipment is intended for use in a laboratory test environment only. It generates, uses, and can radiate radio frequency energy and has not been tested for compliance with the limits of computing devices pursuant to subpart J of part 15 of FCC rules, which are designed to provide reasonable protection against radio frequency interference. Operation of this equipment in other environments may cause interference with radio communications, in which case the user at his own expense is required to take whatever measures may be required to correct this interference.

Trademarks

All trademarks are the property of their respective owners.

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