Texas Instruments TAS3208EVM-LC User manual

TAS3208EVM-LC
Low-Cost (LC) Evaluation Module (EVM)for TAS3208 Digital Audio Processor
User's Guide
Literature Number: SLEU097April 2008

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Contents
Preface ............................................................................................................................... 5
1 Overview ................................................................................................................... 71.1 TAS3208EVM-LC Features ................................................................................................ 81.2 TAS3208EVM-LC Block Diagram ......................................................................................... 91.3 TAS3208EVM-LC PCB Component Mapping .......................................................................... 10
2 Quick Setup Guide .................................................................................................... 112.1 Unpacking the EVM ........................................................................................................ 122.2 Power Supply Setup ....................................................................................................... 122.3 PurePath GDE Software Installation ..................................................................................... 122.4 Developing the Process Flow on the EVM .............................................................................. 132.4.1 Default Configuration ............................................................................................. 132.4.2 Configuring the EVM .............................................................................................. 132.4.3 Master/Slave Mode Operation ................................................................................... 142.4.4 Loading the Process Flow ........................................................................................ 142.4.5 Running the Process Flow ....................................................................................... 15
3 System Interfaces ..................................................................................................... 173.1 Digital Audio Interface ..................................................................................................... 183.1.1 Digital Input Header ............................................................................................... 183.1.2 Digital Output Header ............................................................................................. 183.2 Analog Audio Interface .................................................................................................... 193.2.1 Analog Output Header ............................................................................................ 193.2.2 Analog Input Header .............................................................................................. 193.3 Control Interface ............................................................................................................ 20
Important Notices ............................................................................................................... 21
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www.ti.com
List of Figures
1-1 Block Diagram ................................................................................................................ 91-2 Component Mapping ....................................................................................................... 101-3 Printed Circuit Assembly .................................................................................................. 102-1 PurePath Studio I
2
C Command File Window ........................................................................... 14
List of Tables
1 Related TI Documentation .................................................................................................. 53-1 Digital Audio Input Interface (J1) ......................................................................................... 183-2 Digital Audio Output Interface (J3) ....................................................................................... 183-3 Analog Output Interface (J5) .............................................................................................. 193-4 Analog Input Interface (J4) ................................................................................................ 193-5 Control Interface (J6) ...................................................................................................... 20
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Preface
SLEU097 – April 2008
Read This First
About This Manual
This manual describes the operation of the TAS3208 low-cost (LC) evaluation module (EVM) from TexasInstruments.
How to Use This ManualThis document contains the following chapters:•Chapter 1 – Overview•Chapter 2 – Quick Setup Guide•Chapter 3 – System Interfaces
Information About Cautions and WarningsThis manual may contain cautions and warnings.
CAUTION
This is an example of a caution statement.
A caution statement describes a situation that could potentially damage yoursoftware or equipment.
WARNINGThis is an example of a warning statement.
A warning statement describes a situation that could potentiallycause harm to you.
The information in a caution or a warning is provided for your protection. Please read each caution andwarning carefully.
Related Documentation From Texas InstrumentsTable 1 contains a list of data manuals that have detailed descriptions of the integrated circuits used in thedesign of the TAS3208EVM-LC. The data manuals can be obtained at www.ti.com .
Table 1. Related TI Documentation
DEVICE LITERATURE NUMBER
TAS3208 SLES201BTUSB3210 SLLS466TPA6610A2 SLOS314TPS3808 SBVS050SN74LVC1G08 SCES217TPS79533 SLVS350
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Additional Documentation www.ti.com
Additional Documentation
•PurePath Studio™ Graphical Development Environment (GDE) tool for TAS3208•General application notes•TAS3108 Audio DSP Instruction Set Reference Guide (SLEU067)
Important Software UpdatesThe TAS3208 is shipped with the latest version of PurePath Studio GDE at the time of the initial EVMrelease.
Before starting any new design, verify that you are using the latest version of PurePath Studio GDEavailable by requesting access to the Texas Instruments Mixed Signal Audio & Video extranet viahttp://www-k.ext.ti.com/sc/technical-support/email-tech-support.asp?DSP . Once access is granted, anynew build of the software can simply be downloaded via an internet connection.Trademarks
PurePath Studio, PurePath Digital are trademarks of Texas Instruments.
All other trademarks are the property of their respective owners.
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Chapter 1SLEU097 – April 2008
Overview
The PurePath Digital™ TAS3208EVM-LC demonstrates the TAS3208 Digital Audio Processor from TexasInstruments (TI).
The TAS3208 is a fully programmable high-performance system on chip (SoC) digital audio processor. Ituses an efficient, custom, multi-instruction programming environment optimized for digital audioprocessing algorithms. The TAS3208 architecture provides high-quality audio processing by using a 48-bitdata path, 28-bit filter coefficients, and a single-cycle 28 x 48-bit multiplier with a 76-bit accumulator. Ancustom embedded 8051 microprocessor provides algorithm and data control. The TAS3208 is thecommercial version intended for home audio and other commercial applications.
The TAS3208 is well-suited for inclusion in digital televisions, home theater systems, mini-componentaudio systems, and pro-audio systems.
Topic .................................................................................................. Page
1.1 TAS3208EVM-LC Features ........................................................... 81.2 TAS3208EVM-LC Block Diagram ................................................... 91.3 TAS3208EVM-LC PCB Component Mapping ................................. 10
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1.1 TAS3208EVM-LC Features
TAS3208EVM-LC Features www.ti.com
•Three serial digital stereo inputs (S/PDIF, I
2
S, left- or right-justified)•Two serial digital stereo outputs (S/PDIF, I
2
S, left- or right-justified)•Three analog stereo inputs multiplexed to one analog-to-digital converter•One analog stereo digital-to-analog output•One analog stereo line output•One 24-mW, 3.5-mm headphone output jack•One 3.5-mm stereo line input jack•USB interface for I
2
C control via PurePath Studio GDE•Double-sided plated-through PCB layout•Three LED status indicators for reset, I
2
C, and USB link
The primary usage mode of the EVM is to provide a software development platform that receives thecontrol and signal processing flow descriptions from a host PC running the PurePath™ Studio GraphicalEnvironment (GDE) or Integrated Development Environment (IDE) through a Universal Serial Bus (USB)interface. In this mode of operation, the user develops a signal processing flow and custom componentsusing PurePath™ Studio. The resulting process flows can be loaded into the EVM EEPROM via the USB.The TAS3208 then loads the EEPROM contents and executes the signal processing flows. Duringexecution, many of the TAS3208 signal processing flow parameters can be dynamically changed usingthe PurePath™ Studio Graphical Development Environment, allowing the user to customize the processflow without resetting the device.
The TAS3208EVM-LC contains hardware logic, which can be utilized to reset the TAS3208 Digital AudioProcessor without disconnecting and re-enumerating the USB Controller. A red LED indicates the periodin which the reset is active. Additional on-board LEDs indicate that the board is powered, Active I
2
Ctransactions from either a host controller or the EEPROM, and that the USB link to the host PC isestablished.
Further information on using the EVM with the PurePath Studio GDE is included in subsequent sections ofthis document and through additional PurePath Studio documentation.
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1.2 TAS3208EVM-LC Block Diagram
SDA
SCL
RESET
SDIN3
SDIN1
LRCLK
MCLK
SCLK
HP
POWER
SUPPLY
POR
MCLK
LRCLK
SDIN2
5 V 3.3 V
LDO
3.3 V
RESET
SCLK
TUSB3210
USB-I2C
6x ANALOG INPUTS
HEADER
HPOUT L/R
DACOUT2 L/R
LPF
USB BUS POWER
+5 V/500 mA
I2S
OUTPUT
HEADER
SDOUT1/2
2x ANALOG INPUTS
3.5 mm CONNECTOR TAS3208 LINEOUT1 L/R
HEADPHONE AMP
3.5 mm CONNECTOR
ANALOG
OUTPUTS
HEADER
LOW
PASS
FILTER
POWER-ON RESET
USB-RESET HPOUT L/R
I2S
INPUT
HEADER
www.ti.com TAS3208EVM-LC Block Diagram
Figure 1-1. Block Diagram
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1.3 TAS3208EVM-LC PCB Component Mapping
USB
Input
TUSB3210
(underside)
LED LED
LED
LED
Analog Input Header
Headphone Output
Stereo
Line In Jack
Control Header I S Input Header
2I S Output Header 2Analog Output Header
EEPROM
TAS3208
Reset
TAS3208EVM-LC PCB Component Mapping www.ti.com
Figure 1-2. Component Mapping
Figure 1-3. Printed Circuit Assembly
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Chapter 2SLEU097 – April 2008
Quick Setup Guide
This chapter provides a step-by-step guide to configuring the TAS3208EVM-LC for device evaluation.
This chapter describes the TAS3208EVM-LC board in regard to power supply requirements and systeminterfaces. The chapter provides information regarding handling, unpacking, and absolute operatingconditions.
Topic .................................................................................................. Page
2.1 Unpacking the EVM ................................................................... 122.2 Power Supply Setup .................................................................. 122.3 PurePath GDE Software Installation ............................................ 122.4 Developing the Process Flow on the EVM .................................... 13
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2.1 Unpacking the EVM
2.2 Power Supply Setup
2.3 PurePath GDE Software Installation
Electrostatic Discharge Warning www.ti.com
Electrostatic Discharge WarningMany of the components on the TAS3208EVM-LC are susceptible to damage by electrostatic discharge(ESD). Customers are advised to observe proper ESD handling precautions when unpacking and handlingthe EVM, including the use of a grounded wrist strap at an approved ESD workstation.
CAUTION
Failure to observe ESD handling procedures may result in damage to EVMcomponents.
Upon opening the TAS3208EVM-LC package, please check to make sure that the following items areincluded:
•One TAS3208EVM-LC board using one TAS3208PZP•One CD-ROM containing GDE software, application reports, user guides, schematics, board Gerberfiles, and PC software tools•One USB-type A-to-mini cable.
Note: If any of these items are missing, please contact the Texas Instruments Product InformationCenter nearest you to inquire about a replacement.
The TAS3208EVM-LC is powered via the universal serial bus (USB) connection from the host PC. Noadditional power supplies are needed to evaluate the device.
The TAS3208 is programmed and configured using Texas Instruments PurePath Studio. PurePath Studiois composed of the graphical development environment (GDE), the integrated development environment(IDE), and the component publisher.•The GDE permits the user to program TAS3208 using predefined signal processing components thatare placed and connected graphically in the GDE pallet. PurePath Studio runs on a Windows XPcomputer.
•The IDE is software development environment that permits the user to construct and test the code fora new GDE component.•The component publisher is used to create the component, define the component’s control interfaceand the ways in which the component can be used.
The PurePath Studio software is supplied on the TAS3208EVM-LC Software CD-ROM. The latest versionof the PurePath Studio is available on the Texas Instruments extranet for registered users.
There are two types of licenses:•Evaluation license – The evaluation license is available for users who are interested only in evaluatingthe PurePath Studio Tool suite•Production license – The production license is available for users who are interested in productdevelopment using the PurePath Studio tools. This is the software license that is needed to support theEVM.
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2.4 Developing the Process Flow on the EVM
2.4.1 Default Configuration
2.4.2 Configuring the EVM
www.ti.com Developing the Process Flow on the EVM
Once registered, access to the extranet is available by using a browser to access my.ti.com and selectingextranets. The PurePath Studio software is contained under the link TAS3208 PurePath Studio.•To load PurePath Studio software suite– From CD-ROM
•Insert the TAS3208 Software CD-ROM•Open the TAS3208GDE directory and run setup_PurePath_Studio_vx.xx.exe•Follow the instructions to compete the installation.The CD-ROM also contains initialization files for master and slave EVM initialization and asimple process flow that can be used to verify the TAS3208EVM-LC operation. After thePurePath Studio installation is complete, copy the contents of the CD-ROM TAS3208_Configdirectory to C:\Program Files\Texas Instruments Inc\PurePath Studio\MyProcessFlows.– From download
•Save the installation file to temporary directory•Go to the temporary directory and run setup_PurePath_Studio_vx.xx.exe•Follow the instructions to compete the installation.
The TAS3208 is placed into the default configuration upon receiving a reset. The reset signal comes fromone of the two following methods.•Pressing the reset button•Sending a reset signal through the USB interface via the GDE
Note: Following the receipt of the reset, the TAS3208 loads the contents of the EEPROM andconfigures the SAP clock for master mode operation.
After completing the software installation, connect the USB cable to J7 on the TAS3208EVM-LC board.This connection powers the EVM and automatically enumerates the TUSB3210 USB Serial Controllerrequired for communication between the host PC and the TAS3208 Digital Audio Processor.
Start PurePath Studio using the Start Menu. The program takes a few seconds to load on the host PC.The TAS3208 requires a configuration file to be loaded after a device reset. This file configures theTAS3208 for operation.
Note: Always verify that a configuration file is specified in the Execute I
2
C command file windowbefore attempting to execute a process flow. An unspecified I
2
C configuration file uponexecution may result in unspecified device behavior.
The configuration tool is available under the Tools menu in the GDE.
Tools >> I
2
C Command Tool
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2.4.3 Master/Slave Mode Operation
2.4.3.1 TAS3208EVM-LC Operation in Master Mode
2.4.3.2 TAS3208EVM-LC Operation in Slave Mode
2.4.4 Loading the Process Flow
Developing the Process Flow on the EVM www.ti.com
Figure 2-1. PurePath Studio I
2
C Command File Window
The TAS3208 can be configured for both master and slave modes via the SAP/Clock register. By default,the TAS3208 is configured for master mode. The TAS3208 can be changed to operate in slave mode byloading the correct SAP/Clock registers settings via the configuration file.
Example master and slave configuration scripts can be found on the CD-ROM included with theTAS3208LC Evaluation Module.
Note: Make sure to verify check the ‘Execute on reset’ box before closing the Configuration Tool.
In master mode, the MCLK, SCLK, and LRCLK for the system are internally generated by the externalcrystal. Serial Digital Audio is input in to the TAS3208EVM-LC via the Serial Digital Input header (J1).Analog signals are input via the analog input header (J4), or the line in jack (J2).
In slave mode, MCLK, SCLK, and LRCLK for the system must be externally provided by the user’s systemcontroller on the serial digital input header (J1). The DSP, MCU and I
2
C clocks are still internally derivedfrom the external crystal. Serial Digital Audio is input in to the TAS3208EVM-LC via the Serial Digital Inputheader (J1). Analog signals are input via the analog input header (J4), or the line in jack (J2).
Note: Audio performance in slave mode depends on the quality of the I
2
S clocks. The clocksshould be buffered before the TAS3208. The lowest sampling frequency for acceptable audioperformance is slave mode is 44.1 kHz.
The process flow can be built using the TAS3208 application framework, TAS3208 I/O components, andaudio processing components.
Note: The TAS3208 application framework must be loaded into the pallet before any othercomponents can be added.
The CD-ROM included with the TAS3208EVM-LC comes with a sample process flow that allows thedevice to stream analog audio from input to output. This process flow can be loaded from the file menu.
File >> Open
Browse to the TAS3208.pfw using Windows Explorer and open the process flow. The TAS3208.pfw isdesigned to stream an analog signal from input to output.
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2.4.5 Running the Process Flow
www.ti.com Developing the Process Flow on the EVM
To run the process flow, use the build menu and select run.
Build >> Run
The GDE generates and assembles the code for the process flow, downloads it to the EVM, then resetsthe TAS3208EVM-LC board. At this point the GDE switches from Edit Mode to Run Mode, and streamsaudio from input to output.
For more advanced use of the GDE please refer to the GDE online help, Release Notes, and theTAS3108/TAS3108A Audio DSP Instruction Set Reference, literature number SLEU067 . These materialsare available via www.ti.com .
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Quick Setup Guide16 SLEU097 – April 2008Submit Documentation Feedback

Chapter 3SLEU097 – April 2008
System Interfaces
This chapter describes the TAS3208EVM-LC board in regard to system interfaces.
Topic .................................................................................................. Page
3.1 Digital Audio Interface ............................................................... 183.2 Analog Audio Interface .............................................................. 193.3 Control Interface ....................................................................... 20
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3.1 Digital Audio Interface
3.1.1 Digital Input Header
3.1.2 Digital Output Header
Digital Audio Interface www.ti.com
The digital audio interface contains the digital I
2
S clocks and data. Please refer to the TAS3208 DataManual for signal timing an overview of the I
2
S protocol.
Table 3-1. Digital Audio Input Interface (J1)
HEADERSIGNAL NAME SCHEMATIC NET NAME
PIN ASSIGNMENT
Master clock input MCLKIN 1Digital ground GND 2Serial clock input SCLKIN 3Digital ground GND 4Left/right clock input LRCLKIN 5Digital ground GND 6Serial data 1 input SDIN1 7Digital ground GND 8Serial data 2 input SDIN2 9Digital ground GND 10Serial data 3 input SDIN3 11Sony/Philips digital interface format input SPDIF_IN 12
Table 3-2. Digital Audio Output Interface (J3)
HEADERSIGNAL NAME SCHEMATIC NET NAME
PIN ASSIGNMENT
Not connected NC 1Not connected NC 2Serial data 2 output SDOUT2 3Digital ground GND 4Serial data 1 output SDOUT1 5Digital ground GND 6Serial clock output SCLKOUT 7Digital ground GND 8Left/right clock output LRCLKOUT 9Digital ground GND 10Master clock output MCLKOUT 11Digital ground GND 12
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3.2 Analog Audio Interface
3.2.1 Analog Output Header
3.2.2 Analog Input Header
www.ti.com Analog Audio Interface
Table 3-3. Analog Output Interface (J5)
HEADERSIGNAL NAME SCHEMATIC NET NAME
PIN ASSIGNMENT
Right headphone amp output HPR 1Analog ground GND 2Left headphone amp output HPL 3Analog ground GND 4Digital-to-analog 2 right output DAC2R 5Analog ground GND 6Digital-to-analog 2 left output DAC2L 7Analog ground GND 8Lineout 1 right output LINE1R 9Analog ground GND 10Lineout 1 left output LINE1L 11Analog ground GND 12
Table 3-4. Analog Input Interface (J4)
HEADERSIGNAL NAME SCHEMATIC NET NAME
PIN ASSIGNMENT
Analog ground GND 1Line 1 left input LINEIN1L 2Analog ground GND 3Line 1 right input LINEIN1R 4Analog ground GND 5Line 2 left input LINEIN2L 6Analog ground GND 7Line 2 right input LINEIN2R 8Analog ground GND 9Line 3 left input LINEIN3L 10Analog ground GND 11Line 3 right input LINEIN3R 12
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3.3 Control Interface
Control Interface www.ti.com
This interface connects the TAS3208 to an external controller. This is a general purpose interface.
Table 3-5. Control Interface (J6)
HEADERSIGNAL NAME SCHEMATIC NET NAME
PIN ASSIGNMENT
Ground GND 1Not connected NC 2Mute GND 3General purpose input/output 2 GPIO2 4General purpose input/output 1 GPIO1 5General purpose input/output 3 GPIO3 6General purpose input/output 4 GPIO4 7Ground GND 8Ground GND 9Serial clock 1 SCL1 10Ground GND 11Serial data 1 SDA1 12
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