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Readout protection from level 1 to 0

fgori.1
Associate

I've a STM32L451 uC with 1.8V of supply voltage.

I've the readout protection at level 1, but I can't go back to the 0 level. I tried with stlink and jlink ( j-link STM32 Unlock) but it doesn't work.

is there a sequence to solve the problem ?

The BOR is 0

Thank you so much

2 REPLIES 2
Uwe Bonnes
Principal III

Did you try a level -adapting probe?

fgori.1
Associate

Thank you! I changed the supply voltage to 3.0V and it's work now.