Texas Instruments TPA5050EVM User manual

1 Introduction
1.1 Description
User's GuideSLOU183 – June 2006
TPA5050EVM
Contents1 Introduction .......................................................................................... 12 Software ............................................................................................. 23 Operation ............................................................................................ 64 Reference ............................................................................................ 85 TPA5050EVM Schematic Diagram ............................................................. 12
List of Figures
1 TPA5050 in I
2
S Mode With Separate Delays for Left and Right Channels ................. 32 TPA5050 in I
2
S Mode With Frame Delay........................................................ 43 TPA5050 in Right-Justified Mode ................................................................ 54 TPA5050 in I
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S Mode – Unable to Communicate .............................................. 65 Top Layer of the TPA5050EVM .................................................................. 76 Bottom Layer of the TPA5050EVM .............................................................. 87 TPS5050EVM Top Layer .......................................................................... 98 TPA5050EVM Second Layer ..................................................................... 99 TPA5050EVM Third Layer ....................................................................... 1010 TPA5050EVM Bottom Layer ..................................................................... 10
List of Tables
1 Bill of Materials .................................................................................... 11
The TPA5050 evaluation module (EVM) consists of a single TPA5050 audio delay device, along with otherexternal components mounted on a printed-circuit board (PCB) that can be used to digitally delay eitherthe left, right, or both channels by up to 8191 samples (with a 48-kHz sampling rate, that equates to morethan 170 ms of delay).
The TPA5050EVM is designed to work seamlessly with the TI Input USB board, but can function as astand-alone board for pass-through testing in any system. All that is required is an I
2
S audio source, anI
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C controller, and a 5-V supply.
The TPA5050EVM also includes an onboard digital-to-analog controller (DAC), the PCM1606, which canconvert I
2
S or left-justified data to an analog out. The analog out is filtered on the board and can beviewed with a scope probe.
National Instruments is a trademark of National Instruments Corporation.
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1.2 TPA5050EVM Specifications
2 Software
2.1 Installation
2.2 Software Use
Software
+5 V Supply Voltage 5 V
I
DD
Supply current 150 mA maximumI
DD
(with TI Input USB board connected) Supply current 500 mA maximum
The included compact disk (CD) has all the software and drivers necessary to properly operate theTPA5050EVM with the TI Input USB board. This software is designed to work only with personalcomputers (PC). The installation software consists of TPA505x Interface SAA,Command Tool, and .NetFramework 1.1.
1. Open up the CD, and browse the directory named TPA505x HD GUI Installer.2. Click on setup.exe. The installer will then initialize.3. Next, the user must choose the directories in which to install the software. The default directory for theTPA505x Interface SAA software is C:\Program Files\Texas Instruments Inc\, and the default directoryfor the National Instruments™ files is C:\Program Files\National Instruments\. Other directories may beused, but for purposes of convenience, the default directories are recommended.4. Once the directory selection has been made, click next to proceed.5. The National Instruments™ License Agreement appears. It is necessary to read and accept thisagreement to continue with the installation.6. Once the National Instruments™ License Agreement has been accepted, another window indicatingwhich components are to be installed appears. It should read Adding or Changing - TPA505x InterfaceSAA Files. Click next to proceed.7. The TPA505x SAA Interface program then installs the necessary files.8. Once the TPA505x SAA Interface program has been installed, the setup program begins installingCommand Tool 6.0. The Command Tool License Agreement must be read and accepted forinstallation to continue.9. On acceptance of the Command Tool License Agreement, .Net Framework 1.1 is installed. Thisinstallation procedure may take a while. When it is finished, click ok.10. Command Tool 6.0 proceeds to configure the new software. When it is finished, click Finish.11. Power up the TI Input USB Board (see the Operation section in this document), and then connect theUSB cable from the computer to the TI Input USB Board. A message pops up stating that thecomputer has found new hardware. Shortly after that message appears, the computer finds and installsthe correct drivers for it.
The TPA5050 software graphical user interface (GUI) is designed to allow the user to control the TPA5050by an I
2
C bus.1. Select the I2C address of the EVM by entering the address number under the I2C Address (0-7)section. The default for the program is 0. The default for the EVM is also 0. The number in the programcorresponds to the last three digits of the I
2
C address of the device (ADD2, ADD1, and ADD0), whichcan be controlled by installing or removing jumpers J5, J4, or J3.2. Select the mode of operation by clicking on the appropriate circle under Stream Type.3. The right and left delays can be adjusted by turning the knob to the desired number of delay samples,or simply entering the number in the box provided (see Figure 1 ).4. The right and left delays can be tied together by clicking on the R Track L 1 OFF/ON box to the right ofthe Right Delay knob.5. The delay also can be controlled with the Frame Delay option. Simply click on the Frame Delay Mode1 ON/OFF box, and the frame delay options become available. Frame delay mode affects both left andright channels simultaneously (see Figure 2 ).
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Software
6. Clicking on the Right Justified mode under Stream Type brings up a hidden window, called PacketLength. Through this, the number of packet lengths to be delayed can be entered (see Figure 3 ).7. The option Bypass simply sets the TPA5050 to pass the data through, without doing any manipulationto it.8. The I2C Status display at the bottom right indicates whether the device and the computer arecommunicating properly. A red status bar indicates a problem. A green status bar indicates the deviceand computer are talking (see Figure 4 ). Possible solutions to the red status bar problem are to hit thereset button on the TI Input USB board, check to see that all cables are properly connected, restart theTPA5050 GUI, remove and then re-insert the USB cable into the computer, reboot the computer, orre-install the software.9. The list of registers on the right side of the screen (0x01 …0x07) indicate what values were last writtento that particular register. The TPA5050 only has seven registers, and therefore only the displays in0x01 through 0x07 are valid. The rest are for use with the TPA5051.10. The channel selection tab is designed for use with the TPA5051, which has two channels. TheTPA5050 has only one channel, and therefore only the Channel 1 tab is valid.
Figure 1. TPA5050 in I
2
S Mode With Separate Delays for Left and Right Channels
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Software
Figure 2. TPA5050 in I
2
S Mode With Frame Delay
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Software
Figure 3. TPA5050 in Right-Justified Mode
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3 Operation
3.1 Quick Start List for Use With the TI Input USB Board
3.2 Power Supply
3.3 EVM Preparation
Operation
Figure 4. TPA5050 in I
2
S Mode – Unable to Communicate
Follow these steps to use the TPA5050EVM with the TI Input USB board. This requires a digital or analogaudio source, a 5-V power supply, and the included USB and ribbon cables.
1. Ensure that all external power sources are set to OFF2. Connect an external regulated power supply set to 5 V to the module +5V (J7) and GND (J6), takingcare to observe marked polarity.
1. Ensure that the shunts are fully installed on jumpers J1 and J2. This jumper setting sets the operatingmode of the PCM1606 to I
2
S.2. Install the shunts across J3,J4, or J5, to set the I
2
C address of the TPA5050. J3,J4, and J5correspond to ADD0, ADD1, and ADD2, respectively. Installing the shunt across a given jumper pullsthat pin high. The default is 000. Installing a shunt across J3 sets the address to 001.
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1
4
3
6
2
Operation
3. Connect the 34-pin ribbon cable between header J800 on the TI Input USB board and header H1 onthe TPA5050EVM.
4. Connect the 16-pin ribbon cable between header J850 on the TI Input USB board and header H3 onthe TPA5050EVM.
5. Connect the USB cable from the USB jack on the PC to the J350 USB Interface on the TI Input USBboard.
6. For additional delay, another TPA5050EVM can be added in series using the 16-pin and 34-pin ribboncables.
Note: No pullup resistors are installed on the TPA5050EVM. Doing so interferes with theinitialization of the TI Input USB board in certain circumstances. However, the pads for thepullup resistors, including SDA and SCL ( R13 and R14, respectively), are available on theEVM for populating if the EVM is to be used in a stand-alone fashion
Figure 5. Top Layer of the TPA5050EVM
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3.4 Operation
4 Reference
Reference
Figure 6. Bottom Layer of the TPA5050EVM
1. Turn on the power supply for the TPA5050EVM.2. Depress the reset button on the TI Input USB board3. Insert a signal source into the TI Input USB board. If it is an analog source, insert it into the jacklabeled CH1+2.4. If the source is digital, insert it into either the RCA jack or the optical jack, and ensure that the switchbetween them is selected properly.5. Play the music or other source.6. Use the GUI to mute the left or right channels, and to delay themNote: The TI Input USB board is designed to output I
2
S only.7. Use scope probes to view both delayed and nondelayed signals via the DAC. TP1 and TP2 (left andright, respectively) and TP3 and TP4 (left and right, respectively) are the original signals.8. External amplifiers can be connected to the output of the PCM1606; however, the supplied AGND testpoint should be used as the ground reference for external amplifiers. Consult the PCM1606 data sheetfor more information regarding this topic.
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4.1 TPA5050EVM PCB Layers
Reference
Figure 7. TPS5050EVM Top Layer
Figure 8. TPA5050EVM Second Layer
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Reference
Figure 9. TPA5050EVM Third Layer
Figure 10. TPA5050EVM Bottom Layer
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