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PCM1864: Digital Mixer

KimHsu
Intellectual 545 points
Part Number: PCM1864
Other Parts Discussed in Thread: PCM1865, , PCM1862, PCM1863, PCM1860

1. We don't find the CH2L/CH2R inthe GUI

2. Which register could setting this function? We use LA to find the register is 0x84, but we don't find this register in data sheet.

  • 0
    TI__Guru 57800 points

    Hi, Kim,

    Could you please make sure you have an EVM connected?. Channel 2L and 2R are available in the GUI once the PCM1864 or PCM1865 EVMs are detected. This is because the other EVMs (PCM1862 and PCM1863) does not have a second pair of ADCs.

    Best Regards,

      -Diego Meléndez López
       Audio Applications Engineer

  • 0
    TI__Expert 5645 points

    Hi Kim,

    As far as the digital mixer on the PCM186x goes, it allows post ADC mixing, as well as ADC + incoming I 2S mix. In addition, volume control functionality can be performed prior to outputting the signal.

    Regarding configuring the digital mixer, please click on DIGITAL MIXER (black box) in the panel shown in your thread and you should see the below -

    Please use this panel to configure the mixer input and volume control...

    As far as your question goes, can you please clarify regarding the register 0x84? I'm not sure what you need to do wrt this register as it does not exist. You can also give me your use case and I can probably help you with the right configuration.

    Best regards,
    Ravi

  • 0 in reply to Ravi Patil
    Intellectual 545 points

    We use PCM1865/4 GUI, but we don't see so many mixers in our GUI.

  • 0 in reply to KimHsu
    TI__Expert 5645 points

    Hi Kim,

    Can you please confirm if you are using TI PCM1864 EVM?

    If YES, can you please check the marking on the device and make sure the board has the right device? The reason for this question is that the EVM is shared by all the devices in this family (PCM1860/61/62/63/64/65) and the only reason you may be seeing this is because of different device on the EVM.

    Best regards,

    Ravi