Resolved! NUCLEO-H755ZIQ 8MHz HSE instead of 25MHz?
I have several NUCLEO-H755ZI-Q boards, the documentation says that the clock coming out from STLINK should be 25MHz but I meassured STLK_MCO and found an 8MHz signal... on SB72 to be more precise.The sticker on the boards sayNUCLEO-H755ZI-QNUH755ZIQ$...