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TMS320F280025C: F280025 controlCARD : GPIO 24,25,26 and 27 Clarifications

abhishek gota
Prodigy 231 points
Part Number: TMS320F280025C
Other Parts Discussed in Thread: C2000WARE, TMDSCNCD280025C

Hi Folks ,

Can you please confirm on the following things,

1. From C2000Ware_3_02_00_00/boards/controlCARDs/TMDSCNCD280025C/Rev.A/TMDSCNCD280025C_Rev.A_120cCARD_pinout.pdf

From control card information guide https://www.ti.com/lit/ug/spruir3a/spruir3a.pdf 

The GPIO26 and GPIO27 and its corresponding HSEC pins numbers are exactly opposite , Can you confirm which is the correct one ?

2.  From the TMDSCNCD280025C  schematics MCU072A(001)_Sch.PDF , we observe  J1A is connected to 26 and 27. J1 A is USB. Since it is connected to USB does it work for SPI B?

3. J1B and GPIO25 is connected. What is J1B ?  Does SPI B work if it has connection to J1B ?

Schematics Reference Image

  • 0
    TI__Mastermind 41415 points

    Abhishek,

    Looking at the schematic and the pinout PDF file it appears that there is a bug in the schematic implementation causing GPIOs 26 and 27 to be crossed on HSEC 104 and HSEC 106.

    The pinout.PDF file correctly indicates the INTENDED implementation:

    • GPIO26 connects to:
      • HSEC79
      • HSEC106
    • GPIO27 connects to:
      • HSEC81
      • HSEC104

    The schematic confirms the ACTUAL implementation is:

    • GPIO26 connects to:
      • HSEC79
      • HSEC104
    • GPIO27 connects to: 
    • HSEC81
    • HSEC106

    The highlighted connections are crossed and unintended.

    J1A and J1B are a 2x5 header used to show off FSI. J1A is not a USB connector that is J1:A, I can see how the confusion happens.

    J1A and J1B will not inhibit the function of SPIB, but the bug previously mentioned will.

    I am taking actions to correct the bug.

    Regards,
    Cody