How to use STM32CubeProgrammer to set the OEM key and RDP0 to RDP2?

ShimiaoWang · ‎2026-03-19

STM32C5 unlock RDP2 need OEM key, How to use STM32CubeProgrammer to set the OEM key and RDP0 to RDP2?

Please provide me with a correct operation procedure. Thank you.

Aziz BRIGUI · ‎2026-03-23

You can set the RDP level 2 password by writing four 32-bit words into the password field and click on "Set password". If you want to set a password for RDP level 2 with boundary scan, you can write a 32-bit BSKEY.

Please carefully refer to How to set the RDP password keys and levels on STM32C5 MCUs - stm32mcu and STM32CubeProgrammer software description - User manual before any manipulation.

PS: @MGogr.1, STM32CubeProgrammer v2.22.0 supports STM32C5 and the message has been changed as per the screenshot from @ShimiaoWang.

Aziz

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MGogr.1 · ‎2026-03-19

Cube Programmer supports for the following:

"Lock RDP command is only available with STM32U5/STM32WBA/STM32U0/STM32U3".

Since your Controller is C5 series it wont possible.

Aziz BRIGUI · ‎2026-03-23

Hi @ShimiaoWang,

You can set the RDP level 2 password by writing four 32-bit words into the password field and click on "Set password". If you want to set a password for RDP level 2 with boundary scan, you can write a 32-bit BSKEY.

Please carefully refer to How to set the RDP password keys and levels on STM32C5 MCUs - stm32mcu and STM32CubeProgrammer software description - User manual before any manipulation.

PS: @MGogr.1, STM32CubeProgrammer v2.22.0 supports STM32C5 and the message has been changed as per the screenshot from @ShimiaoWang.

Aziz

In order to give better visibility on the answered topics, please click on 'Accept as Solution' on the reply which solved your issue or answered your question.

MGogr.1 · ‎2026-03-23

OK. Thanks.

I'll need to update my Programmer.