• State TI Thinks Resolved
  • Locked Locked
  • Replies 1 reply
  • Answers 1 answer
  • Subscribers 51 subscribers
  • Views 208 views
  • Users 0 members are here
Support feedback
Options
Options
Related

This thread has been locked.

If you have a related question, please click the "Ask a related question" button in the top right corner. The newly created question will be automatically linked to this question.

CC2642R: CC2642 SPI RATE

Arabella Zhang
Intellectual 2920 points
Part Number: CC2642R

Tool/software:

Hi all，

What is the speed of CC2642's SPI bus? I see in the specification that it is 4M, and the clock frequency is 48M. The demo is set to 12M. Please help confirm it.

Thank you very much！

Best Regards,

Arabella Zhang

  • 0
    TI__Guru**** 217467 points

    Hi Arabella,

    The SSI system clock is the source from which the SPI clock is derived, but does not insinuate 48 MHz bit rate capabilities in of itself.  The SPICC26X2DMA TI Driver defines the maximum bit rates as such:

    When the SPI is configured as SPI peripheral, the maximum bit rate is 4MHz.
    When the SPI is configured as SPI controller, the maximum bit rate is 12MHz.

    The spicontroller example uses 1 MHz as the default.  4 MHz for either the controller or peripheral modes is acceptable and recommended, as the bit rate is configurable in the SPI application code.  I'm not sure what demo you're referring to in which 12 MHz is set.

    Regards,
    Ryan