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DLP7970 / TRF7970A able to support SPI mode 0???

devWarrior
Intellectual 330 points
Other Parts Discussed in Thread: TRF7970A, DLP-7970ABP

I have the DLP-7970ABP / TRF7970A, and I have it working great on SPI mode 1, but is there any way to get it to talk to my MCU on SPI mode 0? Right now I set my MCU spi CPOL register to 1, and CPHA to 0. I need CPOL to be 0, so that I can talk to another device as well that only supports mode 0.

  • 0
    TI__Expert 7820 points

    CPHA = 0 and CPOL = 0 is not possible on the DLP-7970ABP booster pack.  This is because the booster pack does not have a reconfigurable MCU internally rather just a TRF7970A only.  The TRF7070A is meant to be only setup for one SPI mode (SPI mode 1).

    What could be done in this case where you have two different SPI slaves with different SPI modes, is if possible to have two different slave select lines, to each slave, and reconfigure the MCU SPI modes before each slave communication. 

  • 0 in reply to Alex K.
    Intellectual 330 points

    Yeah. That's what I was planning on doing. I just wanted to see if it would've been possible. Thanks!