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TAS5766M: Is there a volume control for the TAS5766?

Part Number: TAS5766M

In the “Process Flow” section of the TAS5766M data sheet, (SLAS965D – Revised October 2018), section 7.4.7.5 (page 32) lists a “Stereo Volume Control” block. It states below Figure 43 that the Volume Block is adjustable from -110dB to +6dB with 0.5dB steps, including a fixed gain block of 0dB to 12dB gain.

 I could not find any register settings for this volume control that can be set in 0.5dB increments.

In the register list, these are the only ones that seem to control the gain / volume:

  • Page 1 / Register 2 (Hex 0x02)
  • Analog Gain for Left / Right Channels, settable to either 0dB or -6dB
  • Page 1 / Register 7 (Hex 0x07)
  • Analog +10% Gain for Left / Right Channels, settable to Normal Amplitude or +10% (0.8dB) boosted amplitude

Are there some registers descriptions missing in the data sheet?

Is the data sheet incorrect and the gain can only be changed from 0dB to -6dB?