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LAUNCHXL-F28379D: Error in "LAUNCHXL-F28379D Overview" datasheet concerning Mux options for SCITXDC

Antoine Durant
Prodigy 10 points
Part Number: LAUNCHXL-F28379D

Hello,

I just created a function to configurate the pins to display SCI A's data to my computer screen through the XDS100V2 prob on LaunchPad 28379D.

When I looked in the document "LAUNCHXL-F28379D Overview", i noticed contradictory informations about the pins used for the SCITXDC function.

In the Table, it says the pin with this function is the pin 44 :

In the rest of the document, the SCITXDC function is always wired to pin 42, and after the tests I made in my program, it appears that it is the correct pin used for this function :

I wanted to signal the problem to you for a future edit, finding how to configurate the SCI module to bring datas to my computer with the USB wasn't easy at all.

  • 0
    TI__Mastermind 41365 points
    Hi Antoine,

    These SCI GPIOs are routed differently and have different functionalities. GPIO139 (SCIRX) and GPIO56 (SCITX) are routed to the J5 header, for if you're wanting to jump the SCI signals, while GPIO43 (SCIRX) and GPIO42 (SCITX) are routed to the FTDI chip for the USB to UART interface (i.e. connect to your PC serial port).

    Looking through the documentation this could be spelled out better, rather than needing to review the schematic or look through the LaunchPad demo code. I'll file an internal ticket to have this improved in a future document revision.

    Thanks,
    Kevin