• State
  • Locked Locked
  • Replies 3 replies
  • Subscribers 81 subscribers
  • Views 284 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.

LAUNCHXL-F28377S: SPI C

Jingtai
Genius 4575 points

Part Number: LAUNCHXL-F28377S

I require 3 SPIs and SPI A and SPI B are available but GPIO 70 is wired to the CAN transceiver U3 thus the SPI C is not available. Is it possible to configue SPI C via GPIOs if the CAN is not used?

  • 0
    TI__Guru 57255 points

    Hi Jingtai,

    If you need to use SPI-C, I'd recommend depopulating R43 and R44.  You can then utilize GPIO69, GPIO71 and GPIO72 via the LaunchPad header without fear of contention.

    If you need a SPISOMIC signal, you'd then need to solder a wire onto the resistor pad of R44 in order to gain access to GPIO70.

    Hopefully this helps!


    Thank you,
    Brett

  • 0 in reply to Brett Larimore
    Genius 4575 points
    Thanks for your support.
    I'm going to connect *** to ADS6125 that only requires data input thus the GPIO70 is not required and GPIO69, GPIO71, GPIO72 will be utilized.
    If the CAN interface is not connected the R43 and R44 will not work and they will be kept there. Is it ok?
  • 0 in reply to Jingtai
    TI__Guru 57255 points

    Hi,

    Jingtai said:
    If the CAN interface is not connected the R43 and R44 will not work and they will be kept there. Is it ok?



    No, I would at least recommend removing R44.  The CAN transciever's 'R' signal is an output pin and could drive contention.


    Thank you,
    Brett