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stm32f4
Associate III
December 16, 2018
Question

Nucleo l476RG. Reset when connect to laptopusing usb

  • December 16, 2018
  • 4 replies
  • 1258 views

Hello.

I have a nucleo powered with external 5V. I use to log info using usb.

Eache time i need to talke a log to the log, i cannoct my laptop and MCU reset.

Anyone know if i can hovoid this? Remove SB12 could help Me? any other hint?

Regards,

Carmelo

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    4 replies

    Tesla DeLorean
    Guru
    December 16, 2018

    What version of ST-LINK firmware is being used on the board?

    The reset pin may also have a solder bridge which you could remove. ​

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    stm32f4
    stm32f4Author
    Associate III
    December 16, 2018

    thanks,

    Version is :

    16:32:15 : ST-LINK Firmware version : V2J28M17

    i Try check on schematics but theonly sb o foun on NRST is sb12. I0m not shure it the rigth one.

    Tesla DeLorean
    Guru
    December 16, 2018

    I don't have the schematic to hand.

    The STM32 will reset itself if the VDDA supply glitches or browns-out.

    Tips, Buy me a coffee, or three.. PayPal Venmo (See Profile) Up vote any posts that you find helpful, it shows what's working..
    waclawek.jan
    Super User
    December 16, 2018

    Disconnect the SWD jumpers on CN2.

    When you'll want to program connect them back.

    JW

    stm32f4
    stm32f4Author
    Associate III
    December 17, 2018

    hello, unfortunatly doesnt work.

    carmelo