Power management issue STM32L078RB

AAmor.2 · ‎2021-07-06

I join the schematic of my board to the question.

I am unable to connect my custom board, the error message on STM32CubeProgrammer is "Not STM32 target found" even it detects the supply voltage. The VDD required for the MCU is 1.8V and I connect all supply input pins to VDD. I also placed decoupling capacitors close to these pins. I have no idea why the MCU doesn't start.

Any help or suggestions to check is welcoming

Mohamed Aymen HZAMI · ‎2021-07-06

Hello @AAmor.2,

Maybe it's a pin connectivity or jumper issue ?

Can you please try to connect under reset and tell me if it is Ok?

Mohamed Aymen

AAmor.2 · ‎2021-07-13

Thanks so much for your help.

Unfortunately, it seems that there are no connectivity or jumper issues... (Several boards tested !)

I tried to connect under reset but same error.

How can I see with the MCU pins' state that it is well powered ?

Mohamed Aymen HZAMI · ‎2021-07-14

Hello @AAmor.2,

Please try to connect the BOOT0 pin to Vdd then power off and on the board and see if it works or not !

Mohamed Aymen.