Texas Instruments TLV320AIC12KEVMB-K appendix Device Controls Tab Control Register 1 Tab

Figure 6. Device Controls Tab

6.8.1Control Register 1 Tab

The Transfer Mode control lets the user select between continuous data transfer mode or programming mode. In the continuous data transfer mode, only audio data is sent and received through the serial audio bus. In the programming mode, control data is sent and received through the serial audio bus. The Data Format Mode, if set to 15 bits + 1, allows the codec to run in continuous mode and switch to programming mode by setting the LSB of DIN to 1 to send control data. The USB-MODEVM Audio Interface Configuration currently supports continuous and 16-bits audio data transfers. The Mic Bias sets the voltage of the BIAS pin to 2.35V or 1.35V. The Selected Filter button allows the user to select between an FIR filter or an IIR filter for the decimation/interpolation low-pass filter. The Loopback switches toggle the analog or digital loopback on and off. The indicator below each switch will light when on only if the register data sent by pressing the Program Device button is acknowledged.

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