DEM-DAI3793A/3794A EVM User's Guide July 2007 AIP Consumer Audio—TI Japan SBAU127
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Contents Preface ............................................................................................................................... 9 1 1.1 1.2 1.3 2 3 Electrostatic Discharge Warning ................................................................................ 18 2.2 Unpacking the EVM ............................................................................................... 18 2.3 Default Configuration 19 .......................................................................
A.2 Interfacing to DSPs ............................................................................................... 98 A.2.1 Register Control with DSP Interface ................................................................... 99 A.3 Package Information .............................................................................................. 99 Important Notices .............................................................................................................
List of Figures 1-1 1-2 1-3 2-1 2-2 3-1 3-2 3-3 3-4 3-5 3-6 3-7 3-8 3-9 3-10 3-11 3-12 3-13 3-14 3-15 3-16 3-17 3-18 3-19 3-20 3-21 3-22 3-23 3-24 3-25 3-26 4-1 4-2 4-3 5-1 5-2 5-3 5-4 5-5 5-6 5-7 5-8 5-9 5-10 5-11 5-12 5-13 5-14 5-15 5-16 5-17 6-1 PCM3793A Pin Assignments ............................................................................................. PCM3794A Pin Assignments .............................................................................................
-2 6-3 6-4 6-5 6-6 6-7 A-1 A-2 A-3 A-4 A-5 A-6 A-7 A-8 A-9 A-10 A-11 A-12 A-13 A-14 A-15 A-16 A-17 A-18 A-19 A-20 A-21 A-22 A-23 A-24 A-25 6 PCM3793A DEM-PCM3793RHB-A (Daughter Card #1) .............................................................. PCM3793A DEM-PCM3793RHB-A Board Layout—Silkscreen Side ................................................ PCM3793A DEM-PCM3793RHB-A Board Layout—Component Side .............................................. PCM3793A DEM-PCM3793RHB-A Board Layout—Inner Layer 2 ..
List of Tables 1-1 3-1 3-2 3-3 4-1 4-2 4-3 4-4 4-5 4-6 4-7 5-1 5-2 5-3 5-4 5-5 6-1 A-1 A-2 PCM3793A/94A Terminal Functions ..................................................................................... Register Mapping for Power Up/Down Module ......................................................................... PCM3793A/94A Resistor 125(7dh) RES[4:0]: Resistor Value Control ..............................................
SYS-2722, PSIA-2722 are registered trademarks of Audio Precision, Inc. SPI is a trademark of Motorola, Inc. I2S, I2C are trademarks of NXP Semiconductors. TOSLINK is a trademark of Toshiba Corporation. All other trademarks are the property of their respective owners.
Preface SBAU127 – July 2007 Read This First About This Manual This document provides the information needed to set up and operate the DEM-DAI3793A/3794A EVM evaluation module, a test platform for the 16-bit, low-power PCM3793A/PCM3794A stereo audio codecs. For a more detailed description of the PCM3793A/94A products, please refer to the product data sheets available from the Texas Instruments web site at http://www.ti.com.
www.ti.com Related Documentation From Texas Instruments Related Documentation From Texas Instruments The following documents provide information regarding Texas Instruments integrated circuits used in the assembly of the DEM-DAI3793A/3794A EVM. These documents are available from the TI 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.
Chapter 1 SBAU127 – July 2007 Description The DEM-DAI3793A/3794A EVM is a complete evaluation platform for the PCM3793A/PCM3794A 16-bit, low-power stereo audio codec with microphone bias, headphone, and digital speaker. All necessary connectors and circuitry are provided for interfacing to audio test systems and commercial audio equipment. Topic 1.1 1.2 1.3 .................................................................................................. Page Introduction—PCM3793A/94A ................
www.ti.com Introduction—PCM3793A/94A 1.1 Introduction—PCM3793A/94A The PCM3793A/94A is a low-power stereo codec designed for portable digital audio applications. The device integrates a stereo digital speaker amplifier, headphone amplifier, line amplifier, line input, boost amplifier, microphone bias, programmable gain control, analog mixing, sound effects, and automatic level control (ALC) features. (The PCM3794A has no speaker amplifiers.
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www.ti.com Pin Assignments and Terminal Functions 1.2 Pin Assignments and Terminal Functions Figure 1-1 and Figure 1-2 show the pin assignments for the PCM3793A/94A. Table 1-1 lists the terminal functions.
www.ti.com DEM-DAI3793A/3794A EVM Description Table 1-1.
Description SBAU127 – July 2007 Submit Documentation Feedback
Chapter 2 SBAU127 – July 2007 Getting Started This chapter provides information regarding DEM-DAI3793A/3794A EVM handling and unpacking, absolute operating conditions, and a description of the factory default switch and jumper configuration. Topic 2.1 2.2 2.3 .................................................................................................. Page Electrostatic Discharge Warning ................................................. 18 Unpacking the EVM .......................................
www.ti.com Electrostatic Discharge Warning 2.1 Electrostatic Discharge Warning Many of the components on the DEM-DAI3793A/3794A EVM are susceptible to damage by electrostatic discharge (ESD). Customers are advised to observe proper ESD handling precautions when unpacking and handling the 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 EVM components. 2.
www.ti.com Default Configuration 2.3 Default Configuration Figure 2-1 and Figure 2-2 illustrate the default EVM configuration and the default external equipment connection configuration, respectively. Figure 2-1.
www.ti.com Default Configuration Figure 2-2. EVM and External Equipment Connections The factory default configuration for the DEM-DAI3793A/3794A EVM is listed below.
Chapter 3 SBAU127 – July 2007 Set-Up Guide This chapter discusses how to set up the DEM-DAI3793A/3794A EVM and describes the EVM software. Topic 3.1 3.2 .................................................................................................. Page Basic Operating Set-Up ............................................................. 22 Software Control and Operation..................................................
www.ti.com Basic Operating Set-Up 3.1 Basic Operating Set-Up Follow these steps to set up the DEM-DAI3793A/3794A EVM for operation. Step 1. When using the kit for the first time, install the TUSB3410 VCP (Virtual COM Port) driver to the host PC. To install the driver, refer to the Virtual COM Port Driver Installation Instructions.pdf located in the DEM-DAI3793 folder of the software CD or available through the TI web site. Step 2.
www.ti.com 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.
www.ti.com Software Control and Operation 3.2.3.1 Power Up/Down This menu (shown in Figure 3-4) allows users to manually power up or power down each module. Click the appropriate checkboxes to power up or power down a specific module. Table 3-1 shows the register mapping for each module setting. Abbreviations such as DAL/DAR, MXL/MXR, and ADL/ADR stand for corresponding modules that are described in the block diagram of the PCM3793A (see Figure 3-8). Figure 3-4.
www.ti.com Power Up/Down Time (ms) Options Power Up/Down Time (ms) Options It is possible to select the VCOM ramp up/down time from GND level to a common voltage level or vice-versa by choosing a VCOM capacitor value and time by choosing one of the available checkboxes. A 4.7μF VCOM capacitor is chosen as the default setting (this capacitor is also mounted on the EVM). The 4.7μF VCOM capacitor is the recommended value for operating the EVM.
www.ti.com Power Up/Down Time (ms) Options Figure 3-5. Ramp Up Wave Form with Default Setting 3.2.3.2 Figure 3-6. Ramp Down Wave Form with Default Setting Record Figure 3-7 shows the Record function tab options. Figure 3-7.
www.ti.com Gain Control for ADC Input Options Figure 3-8 shows the EVM modules that correspond to the record function.
www.ti.com Digital Out Mute Control Options 3.2.3.3 Playback The Playback function is shown in Figure 3-9. Figure 3-9.
www.ti.com Headphone Gain Control Options Figure 3-10 shows the corresponding modules for the playback function.
www.ti.com Digital Attenuation (ATP) Options Digital Attenuation (ATP) Options Move the L-ch and R-ch sliders to adjust the gain of the incoming digital signals prior to conversion by the DAC. • The L-ch slider adjusts the DAC digital attenuator level • The R-ch slider controls the DAC digital attenuator level • Select the output channel to be either stereo or mono • The digital boost option enables a gain control of 0dB, +6dB, +12dB, or +18dB for the DAC digital input 3.2.3.
www.ti.com Source Options 3.2.3.5 Signal Processing I Figure 3-13 illustrates the Signal Processing 1 function menu tab. Figure 3-13. Signal Processing 1 Function Menu Tab Source Options Select the Source input to choose either the audio processing unit digital input (DAC) or digital output (ADC). Internal audio processing can be applied to either the DAC or the ADC. This option also allows users to choose an audio source.
www.ti.com 3D Effect Options 3D Effect Options By implementing a 3D effect in this option box, the PCM3793A is enabled to provide 3D sound to the headphone and speaker outputs with low power consumption during either ADC or DAC operation. Check the 3D effect, then select an Effect type and an Efficiency drop-down menu to obtain the desired 3D enhancement.
www.ti.com Notch Filter 1 Coefficient, Notch Filter 2 Coefficient Options Figure 3-15 illustrates the notch filter characteristic. All users can select any frequencies that can be used by the application system based on the notch filter coefficient theory discussed here. fc: Center Frequency 0dB Amplitude (dB) -3dB fb: Bandwidth Frequency Frequency (Hz) Figure 3-15. Notch Filter Characteristic Model Figure 3-16.
www.ti.com DAC Oversampling Control Options 3.2.3.6 Signal Processing 2 The Signal Processing 2 Function menu tab is shown in Figure 3-17. Figure 3-17. Signal Processing 2 Function Menu Tab DAC Oversampling Control Options Select the DAC oversampling control menu to determine the DAC oversampling rate. The oversampling control can be set to either 128fS or a range of 192fS, 256fS, and 384fS.
www.ti.com High-Pass Filter Options 3.2.3.7 Analog Path Figure 3-18 shows the Analog Path Function menu. Figure 3-18.
www.ti.com Analog Input Options Figure 3-19 illustrates the modules that correspond to the analog path function.
www.ti.com PG5 Gain and PG6 Gain Options PG5 Gain and PG6 Gain Options PG5 gain (for the left channel) or PG6 (for the right channel) can be adjusted from the available drop-down menu. 3.2.3.8 Audio Interface Figure 3-20 shows the Audio Interface Function menu. Figure 3-20. Audio Interface Function Menu Tab Audio Interface Setting 1 Options Use this section of the menu to set the audio data format for the DAC input and ADC output, and set the mode as Master or Slave. Bit length is fixed at 16 bits.
www.ti.com HP Detection Options 3.2.3.9 Status Detect The Status Detect function is shown in Figure 3-21. Figure 3-21. Status Detect Function Menu Tab HP Detection Options Use this section of the menu to enable or disable the HP insertion detection process. You can also the HDTI pin logical polarity using the drop-down list box. HP COM Short Detection Options This section of the menu allows you to enable or disable HP COM port short detection.
www.ti.com Speaker Short Detection, L-Ch; Speaker Short Detection, R-Ch 3.2.3.10 Digital Amplifier Figure 3-22 shows the Digital Amplifier function. Figure 3-22. Digital Amplifier Function Menu Tab Setting the operating speed of the Class-D speaker amplifier depends on the performance requirements; click the checkbox to enable this function. Spectrum Spreading control (with Low, Mid, or High options) and the Switching frequency (1.5MHz to 3MHz) can be selected here.
www.ti.com Speaker Short Detection, L-Ch; Speaker Short Detection, R-Ch 3.2.5 Register Setting History When any checkboxes are selected on any tab of the software GUI (including power up/down operation, corresponding resistor address, and so forth), the register value is automatically written into the register setting history panel. These parameters can then be saved, allowing users to identify a particular sequence setting that was sent to the device under test.
www.ti.com Speaker Short Detection, L-Ch; Speaker Short Detection, R-Ch 3.2.5.1 Modifying a .csv File The .csv file stores a sequence of register settings for the PCM3793A. To load a given register setting, it should be written in hex code, as shown in Figure 3-25; use the left row for resistor addresses and the right row for resistor values. Figure 3-25. Opening and Modifying a .csv File A sleep line can be inserted for implementing an interval (or wait) time until executing the next line of the file.
www.ti.com Speaker Short Detection, L-Ch; Speaker Short Detection, R-Ch 3.2.6 Register Direct Access Figure 3-26 illustrates the register direct access dialog. Read function: The Read function is only available in I2C mode. The register value can be read in I2C mode. To read the value, enter the Address number (in hex code format) in the left box and click the Read button. Data corresponding to the address appears. Write function: This window also enables the user to write the register value directly.
Chapter 4 SBAU127 – July 2007 Switches and Connectors This chapter reviews the DEM-DAI3793A/3794A EVM switch and jumper configuration. Topic 4.1 4.2 4.3 4.4 .................................................................................................. Overview .................................................................................. Motherboard ............................................................................. Daughter Card #1 (PCM3793A)...........................................
www.ti.com Overview 4.1 Overview Figure 4-1 shows the location of the switches and connectors on the EVM board. Note: Silkscreen symbol CN320 is not printed on the motherboard, but it is located in the position described. Figure 4-1. EVM Configuration 4.2 Motherboard Table 4-1 through Table 4-4 list the connector references for the DEM-DAI3793A/3794A EVM motherboard. Table 4-1.
www.ti.com Motherboard Table 4-3.
www.ti.com Daughter Card #1 (PCM3793A) 4.3 Daughter Card #1 (PCM3793A) Table 4-5 lists the connector references for the first DEM-DAI3793A/3794A EVM daughter card. Table 4-5. Analog Input and Output—Daughter Card #1 Connectors Analog Input and Output of Daughter Card #1 J1 Stereo microphone input J2 Monaural microphone input J3 Speaker output terminal for L-ch J4 Speaker output terminal for R-ch J5 Headphone output (Cap-less) J6 Headphone output JP5 System clock select.
www.ti.com Daughter Card #1 (PCM3793A) HPOR/LOR HPOL/LOL PCM3793A HPCOM/MONO SPOLN SPOLP SPORN SPORP MONO Connected to CN112 of motherboard LINE OUT (L-Ch) Connected to CN110 of motherboard LINE OUT (R-Ch) Connected to CN111 of motherboard J3 SPOUT (L-Ch) J4 SPOUT (R-Ch) J5 HPOUT (Cap-less) J6 HPOUT Figure 4-3. Analog Output Configuration (Daughter Card #1) CAUTION Do not insert a headphone to J5 and J6 at the same time. Doing so connects resistors in parallel.
www.ti.com Daughter Card #2 (DIR: LC89052T and DIT: DIT4096) 4.4 Daughter Card #2 (DIR: LC89052T and DIT: DIT4096) Table 4-6 lists the connector references for the second DEM-DAI3793A/3794A EVM daughter card. Table 4-6. Analog Input and Output—Daughter Card #2 Connectors Analog Input and Output of Daughter Card #2 SW001 Toggle switch. Opt/Coax selector for S/PDIF input SW002 Toggle switch.
Chapter 5 SBAU127 – July 2007 Evaluation and Measurements This chapter discusses how to set up jumpers on the DEM-DAI3793A/3794A EVM motherboard for performance evaluation using the Audio Precision SYS-2722® or PSIA-2722® audio analyzers. The process of measuring dynamic characteristics is then presented, along with example characteristic data. Topic 5.1 5.2 5.3 5.4 5.5 ..................................................................................................
www.ti.com Slave Mode With Audio Precision SYS-2722 (Default Setting) 5.1 Slave Mode With Audio Precision SYS-2722 (Default Setting) These jumper configurations for the DEM-DAI3793A/3794A EVM motherboard are the default device settings. Simple evaluation using the Audio Precision SYS-2722 (as shown in Figure 5-1) is easily managed.
www.ti.com Slave Mode With Audio Precision SYS-2722 (Default Setting) CN305 T-SCLK T-BCK T-LRCK TX-DATA E-SCLK All short R-SCLK R-BCK R-LRCK RX-DATA CN307 E-SCK Short plug SCK from U003 (DIR: LC89052T) on Daughter Card #2 T-SCLK Short plug BCK from U003 (DIR: LC89052T) on Daughter Card #2 T-BCK CN308 GND T-SCK T-BCK T-LRCK TX-DATA All open R-SCLK R-BCK R-LRCK RX-DATA CN320 Short plug Short plug Figure 5-2.
www.ti.com Master Mode with Audio Precision SYS-2722 5.2 Master Mode with Audio Precision SYS-2722 To enable the DEM-DAI3793A/3794A EVM motherboard for use in Master mode, the path of the S/PDIF input to the PCM3793A through DIR is not available for use. LRCK and BCK change the respective output states at the PCM3793A side in master mode; the respective jumpers of R-BCK, R-LRCK, and RX-DATA should be removed from CN305 to avoid conflict between the input and output of these clocks.
www.ti.com Master Mode with Audio Precision SYS-2722 CN305 T-SCLK T-BCK T-LRCK Short plug TX-DATA E-SCLK R-SCLK R-BCK R-LRCK RX-DATA CN307 E-SCK Short plug SCK from U003 (DIR: LC89052T) on Daughter Card #2 T-SCLK Short plug BCK from U003 (DIR: LC89052T) on Daughter Card #2 T-BCK CN308 GND T-SCK T-BCK T-LRCK TX-DATA All open R-SCLK R-BCK R-LRCK RX-DATA CN320 Short plug Figure 5-4.
www.ti.com Combined Master and Slave Modes With PSIA-2722 5.3 Combined Master and Slave Modes With PSIA-2722 As shown in Figure 5-5, the DEM-DAI3793A/3794A EVM can provide evaluation for both slave and master modes of the PCM3793A at the same time without setup jumpers on the motherboard if the user has access to the PSIA-2722 analyzer. SCKI Clock Manager PSIA-2722 BCK Slave Master DIN DAC Audio Interface Master LRCK ADC Slave DOUT PCM3793A Daughter card #1 Figure 5-5.
www.ti.com Measurements for Dynamic Characteristics CN305 T-SCLK T-BCK T-LRCK TX-DATA E-SCLK All open R-SCLK R-BCK R-LRCK RX-DATA CN307 E-SCK SCK Short plug from U003 (DIR: LC89052T) on Daughter Card #2 T-SCLK BCK Short plug from U003 (DIR: LC89052T) on Daughter Card #2 T-BCK CN308 GND Short plug T-SCK T-BCK T-LRCK TX-DATA R-SCLK R-BCK PSIA-2722 R-LRCK RX-DATA CN320 Short plug Figure 5-6. Jumper Configuration for Combined Master and Slave Modes 5.
www.ti.com Measurements for Dynamic Characteristics 5.4.1 Digital-to-Analog (D/A) Performance Measurement path: 01.Line Output and Headphone Output csv file: 01_DAC_Line_Output_and_Headphone_Output.csv Table 5-1. D/A Line Output Parameters Power Supply Parameter Filter Setting RL (kΩ) LOL LOR 3.3V THD+N (0dBFS at 1kHz) 400Hz—20kHz AES-17 10 0.007% 0.008% SNR (BPZ input) 22Hz—20kHz SPCL + A-weighting 10 93.1dB 93.0dB DR (–60dBFS input) 22Hz—20kHz SPCL + A-weighting 10 93.1dB 92.
www.ti.com Measurements for Dynamic Characteristics 5.4.2 Analog-to-Digital (A/D) Performance Measurement path: 17.Line Input (AIN3L/AIN3R) csv file: 17_ADC_Line_Input.csv Table 5-3. A/D Line Input Parameters Power Supply Parameter Filter Setting Left Channel Right Channel 3.3V THD+N ( –1dB at 1kHz) 400Hz—20kHz AES-17 0.009% 0.009% SNR (BPZ input) 22Hz—20kHz SPCL + A-weighting 90.4dB 90.5dB DR (–60dBFS input) 22Hz—20kHz AES-17 + A-weighting 90.6dB 90.
www.ti.com Measurements for Dynamic Characteristics 5.4.3.1 LC Low-Pass Filter Daughter Card #2 provides an LC low-pass filter (LPF) to obtain a clean analog signal from the pulse-width modulated (PWM) output of the speaker output. This configuration is shown in Figure 5-7. Additionally, a snubber circuit is inserted into the signal line to achieve the best output power performance by suppressing ringing in the PWM pulse; however, a snubber circuit will have negligible effects in the end system.
www.ti.com Measurements for Dynamic Characteristics 5.4.4 Amplitude Versus Frequency Performance 5.4.4.1 A/D Spectrum Measurement path: 17.Line Input (AIN3L/AIN3R) csv file: 17_ADC_Line_Input.csv Note that an unweighted filter and an AES17 bandwidth of 22Hz to 20kHz should be set to obtain precise spectrum results.
www.ti.com Measurements for Dynamic Characteristics 5.4.4.2 D/A Spectrum Measurement path: 01.Line Output and Headphone Output csv file: 01_DAC_Line_Output_and_Headphone_Output.csv Note that an unweighted filter and an AES17 bandwidth of 22Hz to 20kHz should be set to obtain precise spectrum results.
www.ti.com Connection Diagram for Practical Applications 5.5 Connection Diagram for Practical Applications The PCM3793A/94A Daughter Card has been configured to measure dynamic audio performance by common audio analyzer equipment. In a practical application (such as portable audio player or cellular phone), simple components set up as shown in Figure 5-15 will be reasonable to save assembly and test spaces. Specific component values are listed in Table 5-5.
www.ti.com Connection Diagram for Practical Applications 5.5.1 Filter Consideration for Speaker Output For a practical application such as a portable audio player or cellular phone, a ferrite chip bead will be a suitable low-pass filter to the speaker output; see Figure 5-16. Figure 5-17 describes recommended connections for headphone output and insertion detection. SPOLP/ SPORP SPOLN/ SPORN B1 C15 B2 C16 Refer to the product data sheet for further information on this application circuit.
Chapter 6 SBAU127 – July 2007 Schematic, PCB Layout, and Bill of Materials This chapter provides the electrical and physical layout information for the DEM-DAI3793A/3794A EVM. The bill of materials is included for component and manufacturer reference. Topic 6.1 6.2 6.3 .................................................................................................. Page Schematics .............................................................................. 64 Printed Circuit Board Layout ..........
www.ti.com Schematics 6.1 Schematics Figure 6-1 and Figure 6-2 illustrate the schematics for the DEM-DAI3793A/3794A EVM. Figure 6-1.
www.ti.com Schematics Figure 6-2.
www.ti.com Printed Circuit Board Layout 6.2 Printed Circuit Board Layout Figure 6-3 through Figure 6-7 illustrate the printed circuit board (PCB) layout for the DEM-DAI3793A/3794A EVM. Note: Board layouts are not to scale. These figures are intended to show how the board is laid out; they are not intended to be used for manufacturing DEM-DAI3793A/3794A EVM PCBs. Figure 6-3.
www.ti.com Printed Circuit Board Layout Figure 6-4.
www.ti.com Printed Circuit Board Layout Figure 6-5.
www.ti.com Printed Circuit Board Layout Figure 6-6.
www.ti.com Printed Circuit Board Layout Figure 6-7.
www.ti.com Component List 6.3 Component List Table 6-1 lists the Bill of Materials for the DEM-DAI3793A/3794A EVM. Table 6-1. Bill of Materials RefDes Count R3, R5, R6, R7, R8 5 330Ω Description Part Number CP1—CP4 4 0.1μF C8, C9, C13, C14 4 0.82μF ECQV1H824J R4 1 100kΩ, CF1/4C-100kΩJ KOA R9, R10 2 10kΩ CF1/4C-10kΩJ KOA C3, C4, C6, C10 4 10μF/16V R3A-16V100M Elna C1, C2 2 1μF C5 1 1μF/50V R1, R2 2 2.
Schematic, PCB Layout, and Bill of Materials SBAU127 – July 2007 Submit Documentation Feedback
Appendix A SBAU127 – July 2007 Reference .csv Files, Interfacing to DSPs, and Package Information Topic A.1 A.2 A.3 .................................................................................................. Page Reference .csv Files .................................................................. 74 Interfacing to DSPs ................................................................... 98 Package Information..................................................................
www.ti.com Reference .csv Files A.1 Reference .csv Files The .csv files are bundled with the DEM-DAI3793A/3794A EVM Controller. These files enable users to execute register settings corresponding to the specific operating modes discussed in the product data sheet by importing them into the software. Note that each .csv file (listed in Table A-1) must be implemented after an All Active operation is performed with the power_on.csv command; otherwise, these files will not work properly.
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www.ti.com Interfacing to DSPs A.2 Interfacing to DSPs Refer to the following examples for interfacing the PCM3793A to a digital signal processor (DSP) in either slave or master mode. To implement master mode, MSTR = 1 of register 84 (54h) enables master mode operation as discussed in the product data sheet. Insert 5440h to the recommended power-on sequence after DAC power-up (49h) of PCM3793A, as noted in Table A-2. Example A-1.
www.ti.com Package Information A.2.1 Register Control with DSP Interface Table A-2 summarizes the recommended power-on sequence for the PCM3793A. The shaded cells within the table indicate specific register settings that must be configured for the device to properly operate with a DSP interface. Table A-2.
EVALUATION BOARD/KIT IMPORTANT NOTICE Texas Instruments (TI) provides the enclosed product(s) under the following conditions: This evaluation board/kit is intended for use for ENGINEERING DEVELOPMENT, DEMONSTRATION, OR EVALUATION PURPOSES ONLY and is not considered by TI to be a finished end-product fit for general consumer use. Persons handling the product(s) must have electronics training and observe good engineering practice standards.
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.
