Texas Instruments DEM-DAI3793A manual Power On/Off Sequence, Module Function Controls

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Software Control and Operation

Check to see that a Ready notation appears in the lower left-hand corner after successful I2C communication is established. Otherwise, you will see an error box showing a communication error (as shown in Figure 3-2).

Figure 3-2. Communication Error Message

If you received this message, confirm the set-up procedures and restart the software. Shut it down and then execute EVM3793A.exe.

There are four primary sections of the user interface panel (see Figure 3-1):

∙Module controller, for functions such as playback, signal processing, audio format, and so forth;

∙Power on/off sequence controller

∙Register setting history controller

∙Register direct access controller

3.2.2Power On/Off Sequence

By default, each module is set without any of the checkboxes toggled in the Power Up/Down menu. All modules are set to a power-down condition.

Click All Power On (the red box, as shown in Figure 3-3) to easily start EVM operation, instead of powering up the module manually.

Figure 3-3. Power On/Off Sequence Function Buttons

Note: If pressing the Power On/Off sequence button has no effect, check to see that the two files power_on.csv and power_off.csv are located in the same folder on the PC as the EVM software (EVM3793A.exe).

3.2.3 Module Function Controls

The DEM-DAI3793A/3794A EVM controller software contains 10 tabs:

∙Power Up/Down: to power up and power down each module

∙Record: executes gain control for ADC input

∙Playback: executes headphone/speaker gain control and digital ATT

∙ALC: tunes the Automatic Level Control function

∙Signal Processing 1: adjusts the tone control and notch filter coefficient

∙Signal Processing 2: controls DAC oversampling, de-emphasis, and high-pass filtering

∙Analog Path: selects analog input, differential input, and analog mixer

∙Audio Interface: selects the audio interface for ADC and DAC

∙Status Detect: controls headphone short detection and speaker thermal protection

∙Digital Amp: tune switching frequency for digital amplifier

This section discusses each of these tab operations and controls.

SBAU127 –July 2007

Set-Up Guide

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Contents Users Guide Submit Documentation Feedback Contents 100 List of Figures Side List of Tables Submit Documentation Feedback Information About Cautions and Warnings About This Manual How to Use This ManualTrademarks Related Documentation From Texas InstrumentsAdditional Documentation If You Need Assistance FCC WarningPin Assignments and Terminal Functions DescriptionIntroduction-PCM3793A/94A Key FeaturesIntroduction-PCM3793A/94A PCM3793A/94A Terminal Functions Pin Assignments and Terminal FunctionsDEM-DAI3793A/3794A EVM Description DEM-DAI3793A/3794A EVM System DiagramSBAU127 -July Getting Started Unpacking the EVM Electrostatic Discharge WarningEVM Configuration Default ConfigurationDaughter Card #2 DEM-TRVC/LPC MotherboardSet-Up Guide User Interface Panel Basic Operating Set-UpSoftware Control and Operation Module Function Controls Power On/Off SequenceHP COM/MONO HPC Power Up/DownPCM3793A/94A Resistor 1257dh RES40 Resistor Value Control Power Up/Down Time ms OptionsSetting Default Setting Record Ramp Up Wave Form with DefaultDigital Out Mute Control Options Gain Control for ADC Input OptionsDigital Mute ATR Options Playback Function Menu Tab PlaybackSpeaker Gain Control Options Headphone Gain Control OptionsALC Automatic Level Control Digital Attenuation ATP OptionsAuto Level Control Record Options Tone Control Options Signal ProcessingSource Options Output OptionsClick Apply to Filter 1 or Apply to Filter 3D Effect Options15. Notch Filter Characteristic Model High-Pass Filter Options DAC Oversampling Control OptionsZero Cross Control Options De-Emphasis Filter Options18. Analog Path Function Menu Tab Analog PathMic Boost Options Analog Input OptionsD2S Select Options Analog Mixer OptionsAudio Interface Audio Interface Setting 1 OptionsAudio Interface Setting 2 Options PG5 Gain and PG6 Gain OptionsSpeaker Short Detection, L-Ch Speaker Short Detection, R-Ch HP Detection OptionsHP COM Short Detection Options HP Short Detection, L-Ch HP Detection, R-ChDigital Amplifier 4 LC89052T DIR Digital Audio I/F Receiver Control Window24. Register Setting History Window Register Setting History25. Opening and Modifying a .csv File Modifying a .csv FileWrite function Register Direct AccessRead function Daughter Card #2 DIR LC89052T and DIT DIT4096 Switches and ConnectorsMotherboard Main Power Supply and RegulatorPower-Supply Terminals for PCM3793A Power-Supply Pins OverviewI/F Controller MSP430, TUSB3410 Audio I/OAnalog Input and Output-Daughter Card #1 Daughter Card #1 PCM3793AAnalog Output Configuration Daughter Card #1 Audio Clock and Input Data Control Format-Daughter Card #2 Daughter Card #2 DIR LC89052T and DIT DIT4096Analog Input and Output-Daughter Card #2 Evaluation and Measurements Slave Mode Configuration With SYS-2722 Slave Mode With Audio Precision SYS-2722 Default SettingJumper Configuration for Slave Mode Default Master Mode Configuration With SYS-2722 Master Mode with Audio Precision SYS-2722Jumper Configuration for Master Mode Combined Master and Slave Modes With PSIA-2722 Combined Master and Slave Mode Configuration with SYS-2722Jumper Configuration for Combined Master and Slave Modes Measurements for Dynamic CharacteristicsΩ Headphone Output Inserted in Headphone Jack J6 Digital-to-Analog D/A PerformanceD/A Line Output Parameters Stereo Speaker Output Parameters Speaker Output Power PerformanceAnalog-to-Digital A/D Performance A/D Line Input ParametersLC Low-Pass Filter Speaker Output Filter ConfigurationResult BPZ Zero Data Input Result -60dB Input Amplitude Versus Frequency Performance4.1 A/D Spectrum 11. D/A Amplitude vs Frequency 4.2 D/A SpectrumPCM3793A/94A Connection Diagram for Practical Applications16. Recommended Ferrite Bead Filter for Speaker Output Filter Consideration for Speaker OutputSchematic, PCB Layout, and Bill of Materials PCM3793A DEM-PCM3793RHB-A Connector Daughter Card #1 SchematicsPCM3793A DEM-PCM3793RHB-A Daughter Card #1 PCM3793A DEM-PCM3793RHB-A Board Layout-Silkscreen Side Printed Circuit Board LayoutPCM3793A DEM-PCM3793RHB-A Board Layout-Component Side PCM3793A DEM-PCM3793RHB-A Board Layout-Inner Layer PCM3793A DEM-PCM3793RHB-A Board Layout-Inner Layer PCM3793A DEM-PCM3793RHB-A Board Layout-Solder Side Bill of Materials Component ListSubmit Documentation Feedback Appendix a Table A-1. .csv Files Reference .csv FilesFigure A-1. Line Output and Headphone Output Related Signal Flow DiagramsFigure A-2. Headphone Output with Sound Effect Figure A-3. Cap-Less Headphone Output Figure A-4. Headphone Output with Line Input AIN2L/AIN2R 0dB AIN3L MUX1 AIN2L AIN1L D2S AIN1R MUX2 AIN3R AIN2R Figure A-7. Stereo Speaker Output Figure A-8. Mono Speaker Output Figure A-9. Speaker Output with Line Input AIN2L/AIN2R Figure A-10. Speaker Output with Mono Mic Input AIN1L, +20dB +20dB Figure A-12. Line Input AIN2L/AIN2R to Headphone Output Figure A-13. Mono Line Input AIN2L to Headphone Output Figure A-14. Mono Mic Input AIN1L, +20dB to Headphone Output +20dB Figure A-16. Mono Mic Input AIN1L, +20dB to Speaker Output Figure A-17. Line Input AIN3L/AIN3R Figure A-18. Mic Input AIN1L/AIN1R, +20dB Figure A-19. Mic Input AIN1L/AIN1R, +20dB with ALC Figure A-20. Mono Mic Input AIN1L, +20dB Figure A-21. Mono Mic Input AIN1L, +20dB with ALC Figure A-22. Mono Diff Mic Input AIN1L/AIN1R, +20dB Figure A-23. Mono Diff Mic Input AIN1L/AIN1R, +20dB with ALC Interfacing to DSPs Figure A-24. Slave Mode OperationPackage Information Table A-2. Recommended Power-On Sequence for PCM3793ARegister Control with DSP Interface FCC Warning Evaluation BOARD/KIT Important NoticeImportant Notice

DEM-DAI3793A specifications

The Texas Instruments DEM-DAI3793A is a versatile digital-to-analog converter (DAC) evaluation module designed for assessing the performance and capabilities of TI's DACs in various applications. This module features the high-performance DAC3793, which is widely recognized for its precision and flexibility, making it an ideal choice for audio, industrial automation, and communication systems.

One of the standout features of the DEM-DAI3793A is its ability to support a 16-bit resolution. This high resolution enables the module to provide fine granularity in signal representation, ensuring that even the most subtle changes in the input signal are accurately reflected in the output. The DAC3793 also boasts a high sampling rate, which is crucial for applications that require rapid signal processing and real-time data conversion.

The module incorporates advanced technologies such as dynamic element matching and integrated circuitry to minimize distortion and noise. These technologies are crucial for achieving high-fidelity audio playback and improving overall system performance. Additionally, the DEM-DAI3793A is designed to minimize power consumption while maintaining exceptional performance levels, making it suitable for battery-operated devices and energy-conscious applications.

Another significant characteristic of the DEM-DAI3793A is its ease of integration with various development environments. The evaluation module supports both hardware and software interfacing, allowing engineers to quickly prototype and test their designs. It comes equipped with a USB interface for seamless connectivity with computers, along with supporting software tools that facilitate the configuration and testing of the DAC's functionalities.

The DEM-DAI3793A is also designed with a robust set of output options, including differential and single-ended outputs. This flexibility allows for compatibility with a wide range of amplification and filtering circuits. Furthermore, the evaluation module is equipped with convenient power supply options, enabling it to operate in various settings without the need for extensive modifications.

In conclusion, the Texas Instruments DEM-DAI3793A is an exceptional evaluation module that showcases the capabilities of the DAC3793. With its high resolution, advanced technologies, ease of integration, and flexible output options, it serves as an indispensable tool for engineers and developers working on high-performance audio and data processing applications.
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