TLV320AIC3107EVM Software

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4.5Audio Interface Tab

Figure 8. Audio Interface Tab

The Audio Interface tab (Figure 8) allows configuration of the audio digital data interface to the TLV320AIC3107.

The interface mode can be selected using the Audio Serial Data Mode control—selecting either I2S mode, DSP mode, or Right- or Left-Justified modes. Word length can be selected using the Audio Serial Word Length control, and the bit clock rate can also be selected using the Bit Clock Mode rate control. The Audio Data Word Offset, used in TDM mode (see the product data sheet) also can 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 options for 3-stating the DOUT line when no valid data is available and for 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 TLV320AIC3107 data sheet). The channels can be soft-muted when doing the Re-synchronization if the Soft Mute button is enabled.

The default mode for the EVM is configured as 44.1-kHz, 16-bit, I2C words, and the codec is a slave (BCLK and WCLK are supplied to the codec externally). For use with the PC software and the USB-MODEVM, the default settings must be used; no changes to the software are required.

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TLV320AIC3107EVM-K

SLAU261–November 2008

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Texas Instruments TLV320AIC3107EVM-K quick start Audio Interface Tab