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SPI pin (TMS320C6678)

Ana Martins
Intellectual 265 points

Hi,

I need to connect the SPI pin into other devices and I have a total of 16 devices and only one SPI pin. So, my question is, how can i do this?

Thank you!! ;)

  • 0
    TI__Mastermind 42545 points

    Hi Ana,

    Each SPI device can share the SPICLK, SPIDIN and SPIDOUT signals but must have an individual enable signal. The C6678 provides two enable signals, SPICS0 and SPICS1. If you need to connect more SPI devices you can use external logic to steer the CS to the active device on the bus. This can be done with GPIOs and external logic. Remember that the SPI bus may not achieve the speeds listed in the data manual with that many loads.

    Regards, Bill