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TPS65930 how to set fs to fit CD-DA

Rhino
Prodigy 190 points
Other Parts Discussed in Thread: TPS65930, AM3703

Dear All

 

I have a question on TPS65930.

 

By looking at the section “13.2.1.1 TDM codec interface” of TPS65930 TRF, SWCU052F, it is described that Fs which fits for CD-DA is supported such like 44.1/22.05/11.025 kHz.

Master clock is provided at “clk256fs” terminal which frequency is 12.288MHz.

 

The series of 8 kHz sampling can be produced by the master clock by dividing, but CD-DA fs can not be achieved by that master clock.

 

Please let me know how to achieve CD-DA sampling frequency.

 

Best Regards,

Rhino

  • 0
    TI__Genius 15100 points

    Hi,

    I dont know what is CD-DA sampling frequency. If you can explain what that is then I will try to help.

     

    Regards,

    Gandhar.

     

     

  • 0 in reply to Gandhar Dighe
    Prodigy 190 points

    Hi Gandhar,

    Thank you for the reply.

    CD-DA stands for Compact Disc Digital Audio, and its sampling frequency is 44.1kHz.

    TPS65930 supplies 12.288MHz clock which can be divided to 48kHz, but can not generate 44.1kHz.

    So I would like to know the method how to generate 44.1kHz with TPS65930.

    Best Regards,

    Rhino

     

  • 0 in reply to Rhino
    TI__Genius 15100 points

    Hi,

    You can do this using CODEC_MODE[APLL_RATE].

     

    Regards,

    Gandhar.

     

  • 0 in reply to Gandhar Dighe
    Prodigy 180 points

    Hi Gandhar,

    I need clarification regarding TDM audio interface of TPS65930

    In user manual, it is mentioned that TPS65930 have two digital interface

    1. I2S through which AM3703 is connected (MCBSP2)

    2. TDM Interface

    Moreover it is mentioned that TDM interface only configured as master mode.

    My scenario

    I need to provide audio output from MCBSP2 to TPS65930 and also to another HDMI capable TV. So when I am connecting a HDMI capable TV, audio out should be available to HDMI input of TV.

    1. Is there any possibility of providing audio out from TPS65930 to a HDMI capable TV?

    2. Or shall I able to use MCBSP1 for transferring audio output to HDMI capable TV?

    3. If audio transfer through MCBSP1 is possible, then what is the use of audio buffer in MCBSP2 exclusively available in that module only?