How to Spot Fake STM32 MCU.

[APatr.1]

I recently got trouble after my STM32F103CB (128KB/20KB) started to misbehave.

I ask few guys but seems no answer.

Is there any way one can detect loosely cloned STM32 MCU?​

[Tesla DeLorean]

Perhaps buy from reputable sources, who will warrant there authenticity, or provide proof of provenance / traceability.

Can you inspect and X-ray inbound stock?

[TDK]

Not reliably, or with 100% certainty. A bad one perhaps by poor quality silkscreen, or markings that don't match the datasheet. UID, flash size, and similar registers can also provide insight.

If you bought an F103 from a sketchy source at a significant discount, it's probably fake.

[Uwe Bonnes]

Faked STM32, with a marking STM32F, do not come out of nowhere. If they have any functionality at all, they are relabeled clones. These clones all have a newer CortexM core. Read the core revision in the AP IDR register.

              /* Test for non-genuine parts with Core rev 2*/

               if ((ap->idr >> 28) > 1) {

                       t->driver = "STM32F1 (clone) medium density";

                       DEBUG_WARN("Non-genuine STM32F1\n");

[GCosta]

Hi Uwe,

this code can runs in the uC or it is a code used "by" SWD device?

Thanks.

[BODYPRINT]

Hey guys,

I didn't want to create another Fake thread so I hope you don't mind me hijacking this one.

I bought these 6 x STM32F105RBT6 off of ebay..

The add said "Genuine 100%". Probably my first mistake.

Looking at the printing I'm thinking they are fake and would rather not solder them to the boards at this point.

I thought I'd get you guys with more experience to have a look and tell me if you think these are fake as well thanks.

Any help is appreciated.

Thanks :)