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Explorer II
July 29, 2024
Question

Couldnt understand the pinout of nucleo board, same pin is mentioned with 2 GPIO pins

  • July 29, 2024
  • 3 replies
  • 1885 views

I couldn't understand the pinout of the nucleo board

skuma8_0-1722255421502.png

Here in CN8 the blue side pins is mentioned with both D43 and PC8. same in CN7 pin number 1 is mentioned with both PC6 and D16. But which of pin is actually connected to this specific header.

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    3 replies

    Super User
    July 29, 2024

    The A... and D... names are just for Arduino reference. The STM32 names whcih you also find in the data sheet, STM32CubeMX,... start with P for Port and a one letter + a decimal number in range 0..15 like PC8 etc..

    hth

    KnarfB

    Super User
    July 29, 2024

    Look at the schematics.

    They are probably connected to both the CN8 and the CN7 pins.  <--  Sorry, I misread the question; it is as @KnarfB said.

    Again, that would be clear from the schematics.

    Also, the User Manual has tables showing which connector pins connect to what STM32 Port pins:

    D43 on CN8 connects to PC8 on the STM32:

    AndrewNeil_0-1722258488785.png

     

    D16 on CN7 connects to PC6 on the STM32:

    AndrewNeil_1-1722258592596.png

     

     

     

    skuma.8Author
    Explorer II
    July 30, 2024

    Thanks for the clarifications.

    Refering to the schematic, I am left with one more confusion.

    skuma8_0-1722317009902.png

    Here in CN5 , referring to D11,12 & 13, lets say in D11, am I right that if the SB20 jumper is closed then the D11 is connected tp PB15 of the microcontroller and if SB40 is closed then it is connected to PA7 of the STM mcu right ?

    Super User
    July 30, 2024

    @skuma.8 wrote:

    if the SB20 jumper is closed then the D11 is connected tp PB15 of the microcontroller and if SB40 is closed then it is connected to PA7 of the STM mcu right ?


    Correct.

     

    Graduate II
    July 29, 2024

    The Dxx pins are Arduino / Nucleo Morpho designators, not to be confused with PDx pins on GPIO Bank D

    Other Pxy designations are for the IC. Check schematics and data sheet to assuage confusion and doubt..