whats the PWR_EXT on the Nucleo stlink the one thats connected to JP1 its PIN 39 on the stlink's mcu

[Franksterb92]

[Peter BENSCH]

You can find the explanation in UM1724, section 6.3.1, where JP1 refers to this, even if the network name PWR_EXT is not explicitly mentioned.

Does it answer your question?

Regards

/Peter

[Franksterb92]

oh so its a current limit from the USB Source interesting ill tell ya coming from arduino to stm32 is like minor league to professional lol

[Peter BENSCH]

Yes, there are a few more things to consider, but this is made somewhat easier by tools such as STM32CubeMX.

If the problem is solved, please mark this thread as answered by selecting Select as best, as also explained here. This will help other users find that answer faster.

Good luck!

/Peter

[Franksterb92]

i have another question it might be a bug actually i posted it its about debug the sfr tab is missing some registers in rcc apb2enr

[Peter BENSCH]

You probably mean the question asked in this thread?

This is already in progress.

Regards

/Peter

[Franksterb92]

lol thats me that asked that sorry im a forum noob