Texas Instruments TLV320AIC23 User manual
- Category
- Audio cards
- Type
- User manual
This manual is also suitable for
TLV320AIC23 EVM2
Evaluation Platform for the TLV320AIC23 Stereo
Audio CODEC and TLV320DAC23 Stereo DAC
February 2002 DAV Digital Audio/Speaker
User’s Guide
SLEU016
IMPORTANT NOTICE
Texas Instruments Incorporated and its subsidiaries (TI) reserve the right to make corrections, modifications,
enhancements, improvements, and other changes to its products and services at any time and to discontinue
any product or service without notice. Customers should obtain the latest relevant information before placing
orders and should verify that such information is current and complete. All products are sold subject to TI’s terms
and conditions of sale supplied at the time of order acknowledgment.
TI warrants performance of its hardware products to the specifications applicable at the time of sale in
accordance with TI’s standard warranty. Testing and other quality control techniques are used to the extent TI
deems necessary to support this warranty. Except where mandated by government requirements, testing of all
parameters of each product is not necessarily performed.
TI assumes no liability for applications assistance or customer product design. Customers are responsible for
their products and applications using TI components. To minimize the risks associated with customer products
and applications, customers should provide adequate design and operating safeguards.
TI does not warrant or represent that any license, either express or implied, is granted under any TI patent right,
copyright, mask work right, or other TI intellectual property right relating to any combination, machine, or process
in which TI products or services are used. Information published by TI regarding third-party products or services
does not constitute a license from TI to use such products or services or a warranty or endorsement thereof.
Use of such information may require a license from a third party under the patents or other intellectual property
of the third party, or a license from TI under the patents or other intellectual property of TI.
Reproduction of information in TI data books or data sheets is permissible only if reproduction is without
alteration and is accompanied by all associated warranties, conditions, limitations, and notices. Reproduction
of this information with alteration is an unfair and deceptive business practice. TI is not responsible or liable for
such altered documentation.
Resale of TI products or services with statements different from or beyond the parameters stated by TI for that
product or service voids all express and any implied warranties for the associated TI product or service and is
an unfair and deceptive business practice. TI is not responsible or liable for any such statements.
Mailing Address:
Texas Instruments
Post Office Box 655303
Dallas, Texas 75265
Copyright 2002, Texas Instruments Incorporated
EVM IMPORTANT NOTICE
Texas Instruments (TI) provides the enclosed product(s) under the following conditions:
This evaluation kit being sold by TI is intended for use for ENGINEERING DEVELOPMENT OR EVALUATION
PURPOSES ONLY and is not considered by TI to be fit for commercial use. As such, the goods being provided
may not be complete in terms of required design-, marketing-, and/or manufacturing-related protective
considerations, including product safety measures typically found in the end product incorporating the goods.
As a prototype, this product does not fall within the scope of the European Union directive on electromagnetic
compatibility and therefore may not meet the technical requirements of the directive.
Should this evaluation kit not meet the specifications indicated in the EVM User’s Guide, the kit may be returned
within 30 days from the date of delivery for a full refund. THE FOREGOING WARRANTY IS THE EXCLUSIVE
WARRANTY MADE BY SELLER TO BUYER AND IS IN LIEU OF ALL OTHER WARRANTIES, EXPRESSED,
IMPLIED, OR STATUTORY, INCLUDING ANY WARRANTY OF MERCHANTABILITY OR FITNESS FOR ANY
PARTICULAR PURPOSE.
The user assumes all responsibility and liability for proper and safe handling of the goods. Further, the user
indemnifies TI from all claims arising from the handling or use of the goods. Please be aware that the products
received may not be regulatory compliant or agency certified (FCC, UL, CE, etc.). Due to the open construction
of the product, it is the user’s responsibility to take any and all appropriate precautions with regard to electrostatic
discharge.
EXCEPT TO THE EXTENT OF THE INDEMNITY SET FORTH ABOVE, NEITHER PARTY SHALL BE LIABLE
TO THE OTHER FOR ANY INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES.
TI currently deals with a variety of customers for products, and therefore our arrangement with the user is not
exclusive.
TI assumes no liability for applications assistance, customer product design, software performance, or
infringement of patents or services described herein.
Please read the EVM User’s Guide and, specifically, the EVM Warnings and Restrictions notice in the EVM
User’s Guide prior to handling the product. This notice contains important safety information about temperatures
and voltages. For further safety concerns, please contact the TI application engineer.
Persons handling the product must have electronics training and observe good laboratory practice standards.
No license is granted under any patent right or other intellectual property right of TI covering or relating to any
machine, process, or combination in which such TI products or services might be or are used.
Mailing Address:
Texas Instruments
Post Office Box 655303
Dallas, Texas 75265
Copyright 2002, Texas Instruments Incorporated
EVM WARNINGS AND RESTRICTIONS
It is important to operate this EVM within the input voltage range of 0–1.5 V and the output
voltage range of 0 V and 3.6 V.
Exceeding the specified input range may cause unexpected operation and/or irreversible
damage to the EVM. If there are questions concerning the input range, please contact a TI
field representative prior to connecting the input power.
Applying loads outside of the specified output range may result in unintended operation and/or
possible permanent damage to the EVM. Please consult the EVM User’s Guide prior to
connecting any load to the EVM output. If there is uncertainty as to the load specification,
please contact a TI field representative.
During normal operation, some circuit components may have case temperatures greater than
50°C. The EVM is designed to operate properly with certain components above 50°C as long
as the input and output ranges are maintained. These components include but are not limited
to linear regulators, switching transistors, pass transistors, and current sense resistors. These
types of devices can be identified using the EVM schematic located in the EVM User’s Guide.
When placing measurement probes near these devices during operation, please be aware
that these devices may be very warm to the touch.
Mailing Address:
Texas Instruments
Post Office Box 655303
Dallas, Texas 75265
Copyright 2002, Texas Instruments Incorporated
Related Documentation From Texas Instruments
v
Preface
Read This First
About This Manual
This user’s guide describes the setup and operation of the TLV320AIC23
EVM2 evaluation platform, and installation and operation of the
DASCCT_AIC23 software that drives the EVM.
How to Use This Manual
This document contains the following chapters:
Chapter 1 – Introduction
Chapter 2 – Quick Start-Up
Chapter 3 – Theory of Operation
Chapter 4 – Software
Chapter 5 – I
2
C Error Messages
Chapter 6 – Kit Contents
Appendix A – Circuit Card and Schematic
Related Documentation From Texas Instruments
TLV320DAC23 Stereo Audio D/A Converter, 8- to 96-kHz With Integrated
Headphone Amplifier Data Manual – Literature No. SLES001
TLV320AIC23 Stereo Audio CODEC, 8- to 96-kHz, With Integrated
Headphone Amplifier Data Manual – Literature No. SLWS106
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
Trademarks
vi
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 will be required to take whatever measures
may be required to correct this interference.
Trademarks
Windows is a trademark of Microsoft Corporation.
All other trademarks are the property of their respective owners.
Contents
vii
Contents
1 Introduction 1-1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2 Quick Start-Up 2-1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3 Theory of Operation 3-1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3.1 Photographs of EVM 3-3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3.2 Jumper Settings 3-6. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3.3 TLV320AIC23 EVM2 Power 3-6. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3.4 Analog Connections 3-6. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3.4.1 Microphone 3-6. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3.4.2 LINE IN Connections 3-6. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3.4.3 Headphones 3-6. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3.4.4 LINE OUT Connectors 3-6. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3.5 Digital I/O 3-7. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3.6 TLV320AIC23 EVM2 Features 3-7. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3.6.1 Master Clock 3-7. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3.6.2 Digital Loopback 3-7. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3.6.3 Software Interface Connection 3-7. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4 Software 4-1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4.1 DASCCT_AIC23 Installation 4-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4.2 DASCCT_AIC23 Start-Up 4-4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4.3 DASCCT_AIC23 Overview 4-4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4.4 Main Panel 4-4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4.4.1 About Button 4-4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4.4.2 AIC 23 and DAC 23 Radio Buttons 4-4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4.4.3 Master and Slave Radio Buttons 4-4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4.4.4 Message Area 4-5. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4.4.5 Line Input Volume 4-5. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4.4.6 HeadPhone Volume 4-5. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4.4.7 RESET Button 4-5. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4.4.8 EXIT Button 4-5. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4.4.9 I2C Adjust Button 4-6. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4.4.10 I2C Bypass Check Box 4-6. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4.4.11 DataLog On Check Box 4-6. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4.4.12 View Registers Button 4-6. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4.4.13 Dig Loopback Check Box 4-6. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4.4.14 Digital Control Button 4-6. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4.4.15 Analog Control Button 4-6. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Contents
viii
4.4.16 Format Control Button 4-6. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4.4.17 Normal Mode and USB Mode Radio Buttons 4-6. . . . . . . . . . . . . . . . . . . . . . . . . . . .
4.4.18 Clock Select Button 4-7. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4.4.19 Frequency Display Areas 4-7. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4.5 I
2
C Adjust 4-7. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4.6 View Registers 4-8. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4.6.1 Preset Modes 4-8. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4.6.2 L Vol (Line Input) Register 4-10. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4.6.3 R Vol (Line Input) Register 4-10. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4.6.4 L Vol (HeadPhone) Register 4-10. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4.6.5 R Vol (HeadPhone) Register 4-10. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4.6.6 OK, Apply, and Cancel Buttons 4-10. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4.6.7 Audio (Analog) Register 4-10. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4.6.8 Audio (Digital) Register 4-11. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4.6.9 Power Down Register 4-12. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4.6.10 Audio (Format) Register 4-12. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4.6.11 Sampling Rate Register 4-13. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4.6.12 Interface Activate Register 4-14. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
5I
2
C Error Messages 5-1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
6 Kit Contents 6-1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
6.1 TLV320AIC23 EVM2 Kit Contents 6-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
6.2 Bill of Materials 6-3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
A Circuit Card and Schematic A-1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Figures
3–1 TLV320AIC23 EVM2 Parts Location Diagram 3-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3–2 TLV320AIC23 EVM2 Top View 3-3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3–3 TLV320AIC23 EVM2 Bottom View 3-4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3–4 Parallel Port Interface Board Top View 3-5. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3–5 Parallel Port Interface Board Bottom View 3-5. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4–1 AIC23/DAC23 EVM2 Connection Diagram 4-3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4–2 Main Panel 4-4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4–3I
2
C Adjust 4-7. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4–4 Register GUI 4-8. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4–5 Mode Files 4-9. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4–6 Analog Control 4-11. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4–7 Digital Control 4-12. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4–8 Format Control 4-13. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4–9 Clock Setup 4-14. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1-1
Introduction
Introduction
The TLV320AIC23 EVM2 is designed to demonstrate the TLV320AIC23 codec
or TLV320DAC23 DAC. With the use of the DAREF106R2 parallel port
interface board, the user can control the EVM with a PC. The supplied software
allows the user to change items such as volume, sample rate, power-down
modes, and audio format on the fly. The user can also change the path of the
audio using the GUI. The user can view all the registers and their values and
change the values using the GUI. To accommodate the various sample rates,
the EVM has a crystal socket allowing the user to change the MASTER
CLOCK frequency. For inputs, a MIC jack and a LINEIN jack (stereo and
LEFT/RIGHT) are available on the EVM. For outputs, HEADPHONE and
LINEOUT (stereo and LEFT/RIGHT) are available on the EVM. Using the GUI
interface, the user can change between USB and NORMAL modes, allowing
various oversampling rates.
The user can choose from several configurations to evaluate the AIC23
product. Using the digital loopback option, the user can input an analog signal
(i.e., CD), perform ADC conversions, and then route the digital result into the
DAC and send the resulting analog signal to LINEOUT or HEADPHONE,
completing the loopback operation. Also available are configurations to
perform RECORD (ADC) and PLAYBACK (DAC) operations.
The AIC23 and DAC23 can be configured for bypass mode and sidetone
mode.
Chapter 1
1-2
2-1
Quick Start-Up
Quick Start-Up
This section explains to the user how to set up the TLV320AIC23 EVM2 quickly
and hear audio using digital loopback.
1) Set the jumpers for the appropriate conditions as explained in Section 3.2
2) Power up the AIC23 (PJ1) per Section 3.3
3) Connect audio source (e.g., CD player) LINEIN (J1).
4) Connect speaker or headphone to J4.
5) Connect the parallel port interface board to the PC parallel port and, via
the supplied cable, the miniDIN 8-pin jack, J5.
6) Run DASCCT_AIC23 from your PC.
7) When the GUI appears, select the AIC23 radio button (upper left-hand
corner), and check the Dig Loopback check box (bottom, left of center).
8) Audio will be heard from the speakers or headphones.
9) Adjust the volume, using either the HeadPhone Volume or Line Input
Volume controls.
Chapter 2
2-2
3-1
Theory of Operation
Theory of Operation
This section provides a comprehensive description and explanation of the
various features of the TLV320AIC23 EVM2.
Topic Page
3.1 Photographs of EVM 3-3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3.2 Jumper Settings 3-6. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3.3 TLV320AIC23 EVM2 Power 3-6. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3.4 Analog Connections 3-6. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3.5 Digital I/O 3-7. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3.6 TLV320AIC23 EVM2 Features 3-7. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Chapter 3
3-2
Figure 3–1.TLV320AIC23 EVM2 Parts Location Diagram
Headphone
Left In
J2
J2R J2L
U1
Y1
J3
J1L
J1
J1R
J5
Master CLKIN
J7
PJ1
J4
Left OutRight Out
Line Out
MIc
Right In
Line In
Parallel
Port
Connector
I
2
C
Master CLKOUTDigital I/O
Power
Photographs of EVM
3-3
Theory of Operation
3.1 Photographs of EVM
Figure 3–2.TLV320AIC23 EVM2 Top View
Photographs of EVM
3-4
Figure 3–3.TLV320AIC23 EVM2 Bottom View
Photographs of EVM
3-5
Theory of Operation
Figure 3–4.Parallel Port Interface Board Top View
Figure 3–5.Parallel Port Interface Board Bottom View
Jumper Settings
3-6
3.2 Jumper Settings
There are two jumpers on the EVM.
- JP1 is used to select the communication mode of the EVM. Position 1–2
sets the mode for SPI. Position 2–3 sets the mode for I
2
C. The GUI
software was developed for I
2
C communication. For SPI the end-user
needs to create the necessary code. Signals needed for SPI are available
on the EVM.
- JP2 is used to select or deselect the onboard crystal for MASTER CLOCK.
Choose one of the following jumper configurations before applying power to
the EVM:
MASTER CLOCK SOURCE JP2 Y1
Master clock from onboard crystal OUT IN
Master clock supplied externally IN OUT
3.3 TLV320AIC23 EVM2 Power
The TLV320AIC23 EVM2 is powered by an external 5-Vdc power supply (not
included) to a 2,5-mm mini power jack, PJ1. LED1 indicates when power is
applied to the board.
3.4 Analog Connections
3.4.1 Microphone
A 3,5-mm mono jack is available for the microphone input, J3.
3.4.2 LINE IN Connections
A 1.0-V rms (max) input is available at the LINE IN jacks. Two connection types
are available.
- Independent left/right RCA jacks, J1L and J1R.
- 3,5-mm stereo mini jack, J1.
3.4.3 Headphones
A headphone connection is available at J4 for 16- or 32-Ω loads. J4 is a
3,5-mm stereo mini jack.
3.4.4 LINE OUT Connectors
A 1.0-V rms (max) output is available at the LINE OUT jacks. Two connection
types are available.
- Independent left/right RCA jacks, J2L and J2R.
- 3,5-mm stereo mini jack, J2.
Digital I/O
3-7
Theory of Operation
3.5 Digital I/O
A protected header, J7, is available for interfacing with external digital I/O. Two
power sources, 5 V and 3.3 V, are available on J7 for powering external
boards. The 5-V power is tapped directly off PJ1. The 3.3-V power can supply
up to 100 mA.
Signal J7
5v_DIO (5.0 VDC) 1, 2
VCC_DIO (3.0 VDC) 5, 6
DIN 9
DOUT 11
BCLK 13
LRCIN 15
LRCOUT 17
MCLK 19
DIGITAL GROUND 3, 4, 7, 8, 10, 12, 14, 16, 18, 20
3.6 TLV320AIC23 EVM2 Features
3.6.1 Master Clock
The master clock can be either external or internal. For internal mode, a crystal
socket is available. For external mode, the master clock is applied to SMA jack
J8. The master clock input is 5-V tolerant. The master clock output is available
at SMA jack J6. The master clock is derived from the CLKOUT pin (U1 pin 2).
This signal has a 5-V swing.
3.6.2 Digital Loopback
Digital loopback can be enabled using the GUI. This loops DOUT to DIN via
a MUX.
3.6.3 Software Interface Connection
A PC provides control of the TLV320AIC23 EVM2 via a software GUI called
Rhino. A parallel port interface board, DAREF106, connects to the PC parallel
port. A cable with miniDIN 8-pin connectors, included in the TLV320AIC23
EVM2 kit, connects the parallel port interface board to the EVM.
3-8
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Texas Instruments TLV320AIC23 User manual
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- User manual
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