Is it possible to read STM32L0 with RDP L1 using another STM32L4 without RDP?

[NDere.1]

I have one STM32L4 that act as master MCU.

This master MCU is set with RDP L0. I have another slave STM32L0 with RDP L1.

I tried to read this STM32L0 using this master MCU but did not get any result. It seems like this slave MCU did not run the code correctly. This slave MCU did connect with any debugger.

What is possible cause for this situation?

[Jocelyn RICARD]

Hello,

what interface do you use between the 2 MCUs ?

If you try reading content of STM32L0 through SWD interface, this is normal it does not work...

Best regards

Jocelyn