Texas Instruments TLV320DAC23 - Manual (Page 9)

1-1 Introduction
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.
Chapter 1