SLAS666B January 2010 – October 2018 TLV320DAC3101
PRODUCTION DATA.
The has four digital mixing blocks. Each mixer can provide either mixing or multiplexing of the digital audio data. This arrangement of digital mixers allows independent volume control for both the playback data and the key-click sound. The first set of mixers can be used to make monaural signals from left and right audio data, or they can even be used to swap channels to the DAC. This function is accomplished by selecting left audio data for the right DAC input, and right data for the left DAC input. The second set of mixers provides mixing of the audio data stream and the key-click sound. The digital routing can be configured by writing to page 0 / register 63, bits D5–D4 for the left channel and bits D3–D2 for the right channel.
Because the key-click function uses the digital signal processing block, the CODEC_CLKIN, DAC, analog volume control, and output driver must be powered on for the key-click sound to occur.