NUCLEO board can use ST-LINK by dividing it.
Therefore, I use the ST-LINK part of the NUCLEO-767ZI and NUCLEO-207ZG boards in a divide.
After the divide, the power part and the SWD part are connected normally.
On the 207 board, Ethernet works normally but not on the 767 board.
However, if the 767 board and ST-LINK's MCO (Main Clock Output) are connected, normal operation will be performed.
207 board operates normally regardless of MCO.
Anyone who has solved the same problem as me?
