How can I disable RDP2?

[AGóme.3]

Hi, I was testing the different levels of read protection and when I activated RDP 2, I lost full access to my board. I would like to know if there is any way to regain access (do a downgrade), despite losing all the content I had installed, something like a hard reset, ...

[Peter BENSCH]

Welcome, @Alfonso Gómez Martínez​, to the community!

RDP2 is unfortunately (or fortunately) a one-way street, which is also described in the reference manuals, e.g.:

When the read protection Level 2 is set:

• All protections provided by Level 1 are active.
• Booting from RAM or system memory bootloader is no more allowed.
• JTAG, SWV (single-wire viewer), ETM, and boundary scan are disabled.
• User option bytes can no longer be changed.
• When booting from Flash memory, accesses (read, erase and program) to Flash memory from user code are allowed.

Memory read protection Level 2 is an irreversible operation. When Level 2 is activated, the level of protection cannot be decreased to Level 0 or Level 1.

It looks like you have just bricked the device.

Regards

/Peter