Make sure the MCU I use is genuine

vernture · ‎2025-10-26

I'm using a Blue Pill and want to replace its MCU with a genuine.one I purchased from a trusted vendor, yet I'm not 100% sure if it's actually genuine.

1- What are some of the issues with clone/copy/high copy STM32 MCUs?
2- Is there any tool/way I can check the MCU I bought with to see if it is really genuine?

Thanks in advance.

TDK · ‎2025-10-26

There is no way to check if a chip is genuine with 100% accuracy, but some things you can check are here:

Bluepill Diagnostics — Mecrisp Stellaris Unofficial 1.0 documentation

Passing the test means it may be genuine.

Failing the test means it's likely counterfeit.

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momonidenainai · ‎2025-10-27

You can ask the supplier to provide a Certificate of Conformity

Andrew Neil · ‎2025-10-27

@vernture wrote:
a trusted vendor.

What vendor ?

Was it one of the Official ST Distributors?

See: https://www.st.com/content/st_com/en/contact-us.html

@vernture wrote:
I'm using a Blue Pill and want to replace its MCU with a genuine..

Wouldn't it be simpler (probably also cheaper) to just buy a genuine ST board in the first place?

A complex system that works is invariably found to have evolved from a simple system that worked.
A complex system designed from scratch never works and cannot be patched up to make it work.