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LM96570 -- SPI message length

Rob Rodrigues
Mastermind 19780 points
Other Parts Discussed in Thread: LM96570

Hi Team,

 

I am using an application with a custom SPI controller than accepts 8, 16 and 32 bit SPI responses.  Some LM96570 messages are 22-bits.  What would the expected behavior be if the controller tries clocking out 32-bits on a 22-bit message?  Would this simply stuff 10 bits with 0 or 1?  Or would there be unexpected results?

 

Regards,

  • 0
    TI__Mastermind 22825 points

    Hello Rob,

    This is the answer I got from the experts:

    "The incoming data length has to match the length of register to be written in order to play safe.

    If customers need to stuff the data stream into number of bytes or words, place some zero at the beginning of the data stream, because only the last 22-bits in the data stream are accepted and stored in the 22-bit register."

    Regards,

    Hooman