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Original question:

TAS2770: , how to configure it for different wattage w.r.t supply voltage

TAS2770: TAS2770 having TDM/I2C mode, so how to configure it for I2S

Shubham Jagtap2
Intellectual 280 points
Part Number: TAS2770

We have TDM / I2C mode, we interface it on FSYNC, BCLK, SDIN ,SDOUT to external d3vice, then how to configure it for I2S interface as we are using a single channel.

  • 0
    TI__Guru* 84915 points

    Hi, Shubham,

    The TAS2770 supports I2S and other similar audio protocols. However, you would need to configure the I2S mode step by step. As stated in TDM port section ( https://www.ti.com/lit/ds/symlink/tas2770.pdf#page=25 ), you can configure the frame polarity, the start of frame, bits length, channel offset, etc. All these parameters must be set accordingly to the characteristics of the I2S protocol. If you are using a single channel, you would need to configure the I2S interface in stereo mode (the stereo mode works for both mono and stereo).

    Best regards,
    Luis Fernando Rodríguez S.

  • 0 in reply to Luis Fernando Rodriguez S.
    Intellectual 280 points

    Hi Luis,

    Thanks for the reply... My query is we are interfacing this TAS2770 device to a processor on SAI port.

    So we connect 

    TAS2770           uP

    SDIN -             TXD

    SDOUT -          RXD

    SBCLK -          TXC

    FSYNC -         TXFS

    So is there any need of D-Flip Flop between processor and TAS2770 in consideration of TXFS signal.

    Because we are physically interfacing TDM & then configure I2S. 

    Awaiting for your reply..

    Kind Regards,

    Shubham Jagtap

    9970578105

  • 0 in reply to Shubham Jagtap2
    TI__Guru* 84915 points

    Hi, Shubham,

    Could you provide details about the SAI port protocols? Also, could you provide the data format that is used by this port? This is just to verify if it is compatible with the TAS2770.

    Thank you.

    Best regards,
    Luis Fernando Rodríguez S.

  • 0 in reply to Luis Fernando Rodriguez S.
    Intellectual 280 points

    Hello Luis,

    Please find the below SAI port details, Suggest the interface compatibility.

    Features from the processor side

    Transmitter with independent bit clock and frame sync supporting 8 data lines
    • Receiver with independent bit clock and frame sync supporting 8 data lines
    • Each data line can support a maximum Frame size of 32 words
    • Word size of between 8-bits and 32-bits
    • Word size configured separately for first word and remaining words in frame
    • Asynchronous 128 x 32-bit FIFO for each transmit and receive data line
    • Supports graceful restart after FIFO error
    • Supports automatic restart after FIFO error without software intervention
    • Supports packing of 8-bit and 16-bit data into each 32-bit FIFO word
    • Supports combining multiple data line FIFOs into single data line FIFO
    • Independent 32-bit timestamp counters and bit counters for monitoring transmit and
    receive progress

    Kind Regards,

    Shubham Jagtap

    9970578105

  • 0 in reply to Shubham Jagtap2
    TI__Guru* 84915 points

    Hi, Shubham,

    Thank you for sharing the details on the SAI port. I don't see any issue on the port compatibility, the TAS2770 supports the different data, I think the 8-bit data is the only format that is not supported, but the rest of the configuration can apply to the TAS2770 interface.

    Best regards,
    Luis Fernando Rodríguez S.

  • 0 in reply to Luis Fernando Rodriguez S.
    Intellectual 280 points

    Hi Luis,

    Thanks for the confirmation.