STM32G0 Readout Protection questions

[BrianB]

1.  If in RDP Level 1, can the SRAM be read?

2.  If starting in RDP Level 1 and transitioning to RDP Level 0, is the SRAM erased?

3.  Can the contents of SRAM be readout after the transition from RDP Level 1 to RDP Level 0?

 

Thanks.

[TDK]

1) No, RDP level 1 prevents SRAM from being read. From the reference manual:

2) Yes.

3) Yes, but they've been erased.

(Assuming you mean "read" as "read by the debugger" as the program itself can use SRAM just fine regardless of RDP level.)

 

Relevant reading material:

https://www.st.com/resource/en/application_note/an5156-introduction-to-stm32-microcontrollers-security-stmicroelectronics.pdfhttps://kolegite.com/EE_library/application_notes/STM32/STM32_Security.pdf

 

[BrianB]

Thanks for the quick reply