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SSW-105-22-F-D-VS-K Datasheet(HTML) 15 Page - Texas Instruments

Part No. SSW-105-22-F-D-VS-K
Description  TLV320AIC3104EVM and TLV320AIC3104EVM-PDK
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Maker  TI1 [Texas Instruments]
Homepage  http://www.ti.com
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SSW-105-22-F-D-VS-K Datasheet(HTML) 15 Page - Texas Instruments

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4.7
Audio Interface Tab
TLV320AIC3104EVM Software
Figure 9. Audio Interface Tab
The Audio Interface tab (Figure 9) allows configuration of the audio digital data interface to the
TLV320AIC3104.
The interface mode may be selected using the Transfer Mode control—selecting either I2S mode, DSP
mode, or Right- or Left-Justified modes. Word length can be selected using the Word Length control, and
the bit clock rate can also be selected using the Bit Clock rate control. The Data Word Offset, used in
TDM mode (see the TLV320AIC3104 data sheet) can also be selected on this tab.
Along the bottom of this tab are controls for choosing the BLCK and WCLK as being either inputs or
outputs. With the codec configured in Slave mode, both the BCLK and WCLK are set to inputs. If the
codec is in Master mode, then BCLK and WCLK are configured as outputs. Additionally, two buttons
provide the option for placing the DOUT line in a 3-state mode when there is not valid data and
transmitting BLCK and WCLK when the codec is powered down.
Re-synchronization of the audio bus is enabled using the controls in the lower right corner of this screen.
Re-synchronization is done if the group delay changes by more than
±FS/4 for the ADC or DAC sample
rates (see the TLV320AIC3104 data sheet). The channels can be soft muted when doing the re-sync if the
Soft Mute button is enabled.
In the upper right corner of this tab is the Digital Mic Functionality control. The TLV320AIC3104 can
accept a data stream from a digital microphone, which would have its clock pin connected to the
TLV320AIC3104 GPIO1 pin, and the mic data connected to the GPIO2 pin. Once the digital microphone
functionality is enabled, the Digital Mic/ADC Selection selection allows the user to choose if one or two
digital microphones are connected to the codec. If only one digital microphone is connected, then the
remaining ADC can be used with an analog input signal from the analog input pins. Refer to section
SLAU218 – August 2007
TLV320AIC3104EVM and TLV320AIC3104EVM-PDK
15
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