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TAS5727: BTL mode working, need PBTL

Chris Miller
Prodigy 10 points
Part Number: TAS5727

I am working with the TAS5727 EVM board and an ESP32-S3.  I have stereo BTL mode working as expected and playing WAV files, but am getting no audio output in PBTL.  I've removed J1 and bridged J2 and J3.  Here's my initialization sequence...

  1. RESET pin = low
  2. PDN pin = low
  3. Wait 100ms
  4. PDN pin = high
  5. Wait 10ms
  6. RESET pin = high
  7. Wait 10ms
  8. Switch on 12V PVCC
  9. Wait 50ms
  10. Write register 0x1B = 0x00    // Oscillator trim register
  11. Wait 50ms
  12. Write register 0x04 = 0x03    // Select 16 bit word length
  13. Wait 50ms
  14. Write register 0x25 = 0x01103245    // Output mux register - set for PBTL mode
  15. Wait 50ms
  16. Write register 0x19 = 0x3A    // PWM shutdown register - set for PBTL mode
  17. Wait 50ms
  18. Write register 0x05 = 0x02    // Set normal operation mode
  19. Wait 100ms
  20. Write register 0x07 = 0x00C0   // Set master volume

I'm sending a 16 bit stereo WAV file that works correctly in stereo BTL mode.  But I want mono output