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TLV320AIC3262 codec PCM/I2S conversion

mah kon
Intellectual 535 points
Other Parts Discussed in Thread: TLV320AIC3262

Hi all,

Our application is a wearable device, in that audio is similar

to a smartphone application. The different formats we need to support are

1. As shown in the above diagram, bluetooth head set which supports bi-directional audio data. In our application bluetooth headset sends data to TIWI-BLE module, which gives PCM output. Our In-house I2S controller doesn't supports PCM data. So we need to convert PCM data coming from/to BLE module to I2S format for our I2S controller.

Does TLV320AIC3262 can do this work to convert PCM to I2S and vice-verca??

If it supports how to do it??

2. If there is no bluetooth headset, we need to give I2S data to CODEC and playback using headphone and capture through MIC. We find that this task can be handled using TLV320AIC3262. Our only doubt regarding how to convert PCM/I2S or I2S/PCM.

Please help me on this, to select a TI  codec for our application.

Thanks & Regards,

Mahesh.

  • 0
    TI__Mastermind 46195 points

    Mahesh,

    First, refer to http://www.ti.com/lit/pdf/slaa469 for possible ASI configurations regarding slave/master modes.

    Second, our PLL input to the AIC3262 can go down to 512kHz. Usually, if BT is PCM master, we would take the BCLK input and multiply it with our PLL to generate MCLK. If the Bluetooth BCLK is less than 512kHz, it will not be supported. Another alternative is to use analog output of BT module if available and send it into one of our ADCs.

    PCM usually means two things: a data format and an audio serial interface format (de facto). In serial interface format it usually means a serial interface with a bit-wise pulse. Refer to 'DSP mode' in our datasheet and application reference guide. You just need to make sure the interface of BT matches the timing of the interface of the AIC3262.

    Regards,

    J-