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SN65C1167E: use SN65C1167E for long-distance of SPI w/ multi slave

ryan chen
Prodigy 30 points
Part Number: SN65C1167E

I saw technical document (slyt441.pdf) for  long-distance of SPI .

But only mention one slave in document(Fig3).

Can use SN65C1167E for long-distance of SPI w/ multi slave ?

  • 0
    TI__Guru 62920 points

    Hi Ryan,

    It is possible, but the circuitry gets a little more complicated.  For one, additional /CS lines are needed for each slave so that only one master-slave SPI interface is active at once.  (This is a general concern not specific to using SN65C1167E.)  Similarly, you would need to appropriately control the "DE" lines on each slave SN65C1167E so that only one driver is enabled on a given MISO line at a time.  This could be done via GPIO control from an MCU, or you could consider some external circuitry to generate the DE control automatically.  There are a few approaches listed here:

    https://e2e.ti.com/support/interface/f/138/t/830860

    Regards,
    Max