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TMS320C5535: 33.25kHz sample rate support

Dan Andersen
Genius 11460 points
Part Number: TMS320C5535


Is it possible to configure our TMS320C5535 eval board (TMDX5535EZDSP) to support 33.25kHz sample rates via i2s bus interfacing to a windows PC?

Thanks,

Dan

  • 0
    TI__Genius 11460 points
    Correction: 31.25kHz Fs.
  • 0
    TI__Guru 65405 points

    Hi Dan,

    The I2S clocks can be calculated as shown below:

    I2Sn_CLK = SystemClock / (2 CLKDIV+1)

    I2Sn_FS = I2Sn_CLK / (2 FSDIV+3)

    But I think it is not possible to set I2Sn_CLK to 31.25 KHz. 

    The other opportunity is to configure I2SSCTRL  MODE to 0.  In this mode Serializer is configured as a slave. I2Sn_CLK and I2Sn_FS pins are configured as inputs. The bit-clock and frame-synchronization signals are derived from an external source and are provided directly to the I2S synchronizer without being further divided. If you have proper external clock source I2S could works at 31.25 KHz.

    For more details refer to TRM section 10 at:

    BR

    Tsvetolin Shulev