Texas Instruments TLV320AIC23, TLV320DAC23 manual Introduction

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Chapter 1

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.

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Contents User’s Guide Important Notice EVM Important Notice EVM Warnings and Restrictions Read This First How to Use This ManualAbout This Manual Related Documentation From Texas InstrumentsTrademarks Contents Figures Introduction Page Quick Start-Up Page Topic Theory of OperationTLV320AIC23 EVM2 Parts Location Diagram TLV320AIC23 EVM2 Top View Photographs of EVMTLV320AIC23 EVM2 Bottom View Parallel Port Interface Board Top View Jumper Settings TLV320AIC23 EVM2 PowerAnalog Connections Digital I/O TLV320AIC23 EVM2 FeaturesMaster Clock Digital LoopbackPage Software DASCCTAIC23 Installation AIC23/DAC23 EVM2 Connection Diagram DASCCTAIC23 Overview DASCCTAIC23 Start-UpMain Panel About ButtonHeadPhone Volume Line Input VolumeReset Button Message AreaNormal Mode and USB Mode Radio Buttons 9 I2C Adjust Button10 I2C Bypass Check Box DataLog On Check BoxI2C Adjust Clock Select ButtonFrequency Display Areas View Registers Preset ModesMode Files Vol Line Input Register 6 OK, Apply, and Cancel ButtonsVol HeadPhone Register Audio Analog RegisterAudio Digital Register Analog ControlAudio Format Register Power Down RegisterSampling Rate Register Format ControlInterface Activate Register Clock SetupDevice can be undetermined I2C Error MessagesPage Kit Contents TLV320AIC23 EVM2 Kit Contents Description Qty Part Number Mfr Ref. Des Bill of MaterialsERJ-8RQJ3R3V Circuit Card and Schematic Thu Nov 29 104853 Thu Nov 29 104627 Thu Nov 29 104713 Page
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