When I try to debug STOP0 feature and waking up, MCU can't be programmed by STM32 Cube Programmer. It seems that it is locked. Anybody know how to unlock it?

[BWang.1]

..

[Radosław]

Did you set connect under reset?

[BWang.1]

Sorry! I need update the information. the possible reason is that the .hex file is not OK. Current I already saved one electronic board by recovering option byte. But another board can't be connected to STM32 Cube Programmer.:face_with_tears_of_joy:

How to connect under reset? set reset to low level and then try to connect?

[Radosław]

this is option in cubeprogrammer.

[BWang.1]

Already found out it!

Thanks. Tomorrow I will try!