trezor uses RDP level 2
also check https://blog.trezor.io/addressing-concerns-about-trezor-firm...
also check https://blog.trezor.io/addressing-concerns-about-trezor-firm...
Looks like STM documents RDP for the STM32F205 chip in the "Flash programming manual". I'm used to it being covered in the normal "Programming manual". Link for the curious: http://www.st.com/content/ccc/resource/technical/document/pr...
Sorry for any confusion my previous comment may have caused.