Problem to flash external 1,8V board with StlinkV2 Nucleo debugger

Ger · ‎2024-10-31

Hi,

I have a custom board with a STM32L4 powered at 1.8V. I program it without problems with a STLINK-V3MINIE.

Now I want to program it with the stlinkV2 of the NUCLEO -L4R5ZI-P (I have cut it, removed CN4 and connected pins 1,2,3,4 and 5 to CN5):

I can connect and read the memory, but if I try to program, the flash is erased, but not written and the IDE shows this error:

What could be the problem?

Thank you very much!

Andrew Neil · ‎2024-10-31

The STLINK-V3MINIE supports 1.65 to 3.60 V targets.

From the schematic, the ST-Link on that Nucleo board is 3V3 only.