Texas Instruments TLV320AIC23, TLV320DAC23 manual Introduction

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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