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TAC5112: TAC5112 VAD not working when DAC channel enabled

Part Number: TAC5112

We are using the TAC5112 Codec.

Now we want to use the VAD to detect voice on ADC channel 1.

We have tested with Eval-Board. VAD is working and the Interrupt is high, when voice is recognized.

The Problem now is, when I enable the DAC channels, the VAD will not fire the interrupt.

  • w a0 78 a4 is working.
  • w a0 78 e4 is not working.

Here the config:

w a0 00 00
w a0 01 01
d 10
w a0 7f 00
w a0 00 00 #Page 0
w a0 02 09
w a0 42 a0
w a0 0a 31
w a0 50 40
w a0 76 80
w a0 00 01 #Page 1
w a0 1e 02
w a0 33 df
w a0 00 03 #Page 3
w a0 38 09
w a0 39 28
w a0 3a 26
w a0 3b 20
w a0 3c 00
w a0 3d 00
w a0 3e 09
w a0 48 01
w a0 49 01
w a0 00 0a #Page A
w a0 79 fd
w a0 7a db
w a0 7b 01
w a0 7c 80
w a0 7d 02
w a0 7e 24
w a0 7f ff
w a0 00 0b #Page B
w a0 08 7f
w a0 09 fb
w a0 0a b6
w a0 0b 01
w a0 00 11 #Page 11
w a0 79 fd
w a0 7a db
w a0 7b 01
w a0 7c 80
w a0 7d 02
w a0 7e 24
w a0 7f ff
w a0 00 12 #Page 12
w a0 08 7f
w a0 09 fb
w a0 0a b6
w a0 0b 01
w a0 00 00 #Page 0
w a0 78 a4

 

But we need ADC and DAC channels in our setup.

Is this normal, that VAD is not working, when DAC channel is enabled?

  • Hi Jurgen,

    This is a known issue but I'm not sure what the workaround is at the moment. The apps engineer who is most experienced on this is out until next Monday and he can follow up with you then.

    Best regards,
    Jeff McPherson