External Power supply configuration for L432KC nucleo

[xpp07]

When I power my nucleo through the 5V pin, with a 5V supply, the behavior of the controller is not normal. If I power it by USB, it works well. I read the User Manual, have I misunderstood something? What could be happening?

[Tesla DeLorean]

If the ST-LINK firmware is around 25 you might want to update it

[xpp07]

This is my firmware version:

ST-LINK Firmware version : V2J29M18

[Khouloud GARSI]

Hello @XP.1acheco​ ,

Have you respected the following power sequence procedure in order?

1. Check that SB1 is off

2. Connect the external power source to VIN or +5 V

3. Power on the external power supply 7 V< VIN < 12 V to VIN, or 5 V for +5 V

4. Check red LED LD2 is turned on

5. Connect the PC to USB connector CN1

Khouloud.

[xpp07]

Yes, it works that way, but I don't want to connect the PC.

[Tesla DeLorean]

Forked to a new thread

https://community.st.com/s/question/0D50X00009cgLpESAU/still-have-problems-with-supplying-nucleo-l432kc-from-external-source