Arm Mbed OS support forum

Error on Nucleo F446RE "The interface firmware FAILED to reset/halt the target MCU"

Sorry for my post, I have read many previous posts but still cannot find the right answer.
I usually use the Mbed NXP LPC1768 for my project. But recently I have to use Nucleo F446RE for new project and get the error “The interface firmware FAILED to reset/halt the target MCU”
Then I borrow a F429ZI from my friend and do the same process on it. The F429ZI is work fine.
But it’s too big for my job.
So I really confuse what happens? Is the F446RE broke? Should I replace it or is there any solution?

Please feel free to share your experience.
Thank you guys in advance _ / \ _


when no advice helps then it is broken and as an alternative you can try to connect St-link from F429 board to F446 via some wires

BR, Jan

1 Like

Thank you so much. I’ll cut-off the St-link and use another St-link from the good one.
I’ll report the result again if it work.

You do not need to cut off the ST-link immediately for the test, I think. Just remove the two jumpers what are close to each other.

BR, Jan