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TMS320C6455DSK

yvehaba
Prodigy 10 points

Hello,

I work with  dsp TMS320C6455DSK. I have to use the SPI Interface. The device work with MCBSP0.
I have to use Single_Phase 8 bit and this part works fantastic, but it is  possible to use a defined Chip select (CSN)?
For example I need:

CSN low 3 x 8 bit to write CSN high
and
CSN low 4 x 8 bit to write CSN high

In describes cases you have only CSN low 1 x 8 bit to write CSN high in the SPI Mode. The Multichannel I can´t use, because I need the intern Clock-Mode. Sombody any ideas???

  • TI__Guru*** 125430 points

     Using McBSP in SPI mode has a limitation that the chip select needs to be de-asserted between elements.  However, in your case you specifically mentioned doing 3x8-bit and 4x8-bit so I think you can make this work by setting the element size to 24- or 32-bit respectively.