SLAAER9 May   2025 TAC5212

 

  1.   1
  2.   Abstract
  3.   Trademarks
  4. 1Introduction
  5. 2Recording Path Mixers
    1. 2.1 Main ASI Mixer
      1. 2.1.1 Q-31 Formatting for Mixer Coefficients
      2. 2.1.2 Recording Path Main ASI Mixer: Example
    2. 2.2 Auxiliary ASI Mixer
      1. 2.2.1 Recording Path Auxiliary ASI Mixer - Example
    3. 2.3 ADC-to-DAC Loopback Mixer
    4. 2.4 TDM Transmission on DOUT
  6. 3Playback Path Mixers
    1. 3.1 Main ASI Mixer
      1. 3.1.1 Q-16 Formatting for Mixer Coefficients
      2. 3.1.2 Playback Path Main ASI Mixer - Example
    2. 3.2 Auxiliary ASI Mixer
      1. 3.2.1 Playback Path Auxiliary ASI Mixer - Example
    3. 3.3 Playback Path Side-Chain Mixer
      1. 3.3.1 Playback Path Side-Chain - Example
  7. 4Application: ADC Channel Summation to Improve TAC5212 Dynamic Range
  8. 5Application: Analog Input to Analog Output Signal Flow in TAC5412-Q1
  9. 6Summary
  10. 7References

2 Recording Path Mixers

The recording path signal chain consists of four recording channels:

  1. Channel 1 input can be from ADC or PDM path (Selected through B0_P0_R19[7])
  2. Channel 2 input can be from ADC or PDM path (Selected through B0_P0_R19[6])
  3. Channel 3 and 4 inputs are from PDM path

Each of these four inputs are transmitted through a signal chain, and can be mixed at multiple nodes in the signal chain and transmitted to other signal processing blocks. There are three mixers in the recording path:

  1. The Main ASI Mixer described in Main ASI Mixer mixes four inputs (muxed from 2 ADC/4 PDM) and provides four digital outputs to the High-Pass Filter.
  2. The Auxiliary ASI Mixer described in Auxiliary ASI Mixer which the two channels from the ADC-to-DAC loopback path along with two channels from the playback path before sending the mixed data to the Auxiliary ASI bus. (optionally through a Sample Rate Converter (SRC)).
  3. The Loopback Mixer described in ADC-to-DAC Loopback Mixer mixes the four signals from the biquad filters, and provides two digital signal to the playback path.