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TLV1548's SPI

Other Parts Discussed in Thread: TLV1548

     I have read the datasheet of TLV1548IDB,it says tlv1548 supports SPI,but in its application information ,it use MCBSP interface ,not SPI directly,why?

they use MCBSP as SPI ?

  • Hi Billy,

    The part supports both styles of interface. In a true MCBSP port you make use of frame sync return and CLK return to extend transmission line length, this is the configuration shown in figure 39 on page 29 of the datasheet. Just above that figure is figure 38 which shows an interface to a SPI port, though the extra trace to CLK return would probably not be there for a standard microcontroller with a SPI interface.

    So, to answer your question, the application section of the datasheet showing the TMS320 DSP case is using MCBSP, not SPI. The application section showing the interface to a standard microcontroller is SPI, not MCBSP. It would be possible, however, to use the DSP MCBSP port to emulate SPI and run the part in SPI mode with a DSP.

    Hopefully this helps.

  • I have seen that,thank you very much!