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Nucleo l476RG. Reset when connect to laptopusing usb

stm32f4
Associate II

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

5 REPLIES 5

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
Associate II

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.

I don't have the schematic to hand.

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

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Disconnect the SWD jumpers on CN2.

When you'll want to program connect them back.

JW

stm32f4
Associate II

hello, unfortunatly doesnt work.

carmelo