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Haystak
Graduate
April 19, 2024
Solved

stm32l073rz nucleo board

  • April 19, 2024
  • 4 replies
  • 5213 views

Hi Guys I'm Trying to find stm32l073rz Nucleo board datasheet that contains the boards pin description, but I can't find it anywhere

I have found those but when I compare the pin description in the first pic from: NUCLEO-L073RZ | Mbed
with the one provided in this datasheet:Datasheet - STM32L073x8 STM32L073xB STM32L073xZ - Ultra-low-power 32-bit MCU Arm<Sup>®</Sup>-based Cortex<Sup>®</Sup>-M0+, up to 192KB Flash, 20KB SRAM, 6KB EEPROM, LCD, USB, ADC, DACs
I find the pins order is different..

image.pngimage.png

    This topic has been closed for replies.
    Best answer by Andrew Neil
    @Haystak wrote:

    I opened the UM1725 file but couldn't find the description for the pins just found the description for Arduino connectors

    Table 30, as you showed, describes the Morpho connectors - that's the outer double rows of pins.

    For the Arduino pins, see Table 18:

    AndrewNeil_1-1713531554720.png

    These tell you which of the microcontroller's pins is connected to each pin on those connectors.

    Not sure what further "description" of the pins you're looking for?

    The names of the pins in these tables are the same names used in the datasheet table you showed initially:

    AndrewNeil_3-1713532251755.png

     

     

    As @STTwo-32 said, the datasheet lists pins for all possible package variants; the ones you highlighted are only available on the UFBGA100 package (Red) - they are not available on the LQFP64  package (Blue) used on the Nucleo board.

     

    EDIT: highlight the different packages

     

    EIDT 2:

    In the case of the pin highlighted in yellow:

    • The name of the pin is "PE6" - this is the name that the Nucleo tables refer to
    • The position of the pin on the UFBGA100 package is "D2"
    • The position of the pin on the LQFP100 package is "5"
    • The pin is not present on any of the other packages - including the  LQFP64  package used on the Nucleo board.
    • The pin named "PE6" can be configured for one of the Alternate Functions TIM21_CH2 or TIM3_CH4, or the Additional Functions RTC_TAMP3 or WKUP3

     

    4 replies

    A
    Andrew Neil
    Super User
    April 19, 2024

    It should be on the 'Documentation' tab of the Product Page - but that does, indeed, seem to be missing:

    AndrewNeil_0-1713527071148.png

    What you require is the User Manual UM1724

    AndrewNeil_1-1713527228787.png

     

    Google finds it OK - so no idea why it's gone from the Product Page!

    https://www.st.com/resource/en/user_manual/um1724-stm32-nucleo64-boards-mb1136-stmicroelectronics.pdf

     

    A
    Andrew Neil
    Super User
    April 19, 2024

    No, my Mistake - that was the chip Product Page.

    The Product Page for the Nucleo board does have a 'Documentation' tab, and UM1724 is listed:

    AndrewNeil_2-1713527533442.png

    https://www.st.com/en/evaluation-tools/nucleo-l073rz.html#documentation

     

    Does leave the Question of why the chip page has no 'Documentation' tab, though ...

    A
    Andrew Neil
    Super User
    April 19, 2024
    @Andrew Neil wrote:

    Does leave the Question of why the chip page has no 'Documentation' tab, though ...

    @STTwo-32 - any ideas ?

    S
    STTwo-32
    Technical Moderator
    April 19, 2024

    Hello @Haystak and welcome to the ST Community :smiling_face_with_smiling_eyes:.

    The NUCLEO-L073RZ is based on the package LQFP64 of the STM32L073RZ. So, the available pins are just the Pins on this package. For example, the Pin that you have mentioned in yellow is not available on this MCU. For pins on the Board refer to both MCU's Datasheet and the board User manual.

    Best Regards. 

    STTwo-32

      A
      Andrew Neil
      Super User
      April 19, 2024
      @Haystak wrote:

      I find the pins order is different..

      Not sure what you mean by that?

      The order in which pins are broken-out to the headers is entirely unrelated to the order of the pins on the chip package.

      H
      HaystakAuthor
      Graduate
      April 19, 2024

      Thank you for the reply 
      I said order but I meaned the function  (sorry for miss clafication) for example here 

      I opened the UM1725 file but couldn't find the description for the pins just found the description for Arduino connectors

      image.png

      S
      STTwo-32
      Technical Moderator
      April 19, 2024

      As I told you. To understand the pin description on each connector on the NUCLEO Board, I suggest you follow the User manual and refer to the datasheet of the MCU for description of possible functions on each pin.

      Best Regards.

      STTwo-32

        A
        Andrew Neil
        Super User
        April 19, 2024

        If you want to access the TIM21_CH2 Alternate Function on the Nucleo board, it's also available on PA3 and PB14:

        AndrewNeil_0-1713533634467.png

        AndrewNeil_1-1713533666230.png

         

        Similarly, the TIM3_CH4 Alternate Function on the Nucleo board is available on PC9 and PB1:

        AndrewNeil_2-1713533740118.png

         

        AndrewNeil_3-1713533757772.png

         

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