STM32F205 revision V has some weak GPIO port from ESD.

CLee.5.54 · ‎2019-05-20

I use STM32F205ZGT6 for our product.

In our design, PH10 and PH11 is connected external module. When external connected, the port get physical damage in only revision V. I checked that the other revision such as 1 , 2 and 3 don't have same issue.

I set PH10 and PH11 port as alternate function, Open-drain, Pullup and Active Low.

I hope to know this issue is reported or not to STM and what differ between revision V and others.

There are no mention about this issue in errata sheet.

https://my.st.com/content/my_st_com/en/products/microcontrollers-microprocessors/stm32-32-bit-arm-cortex-mcus/stm32-high-performance-mcus/stm32f2-series/stm32f2x5/stm32f205zg.html#resource

Amel NASRI · ‎2019-05-24

Hello @CLee.5.54 ,

As there is no particular issue already known for STM32F205ZGT6 rev V, the problem you are reporting needs to be investigated.

So, could you please

share the schematic of your board?
provide the trace code of device(s) having the issue? Do all devices with the problem have the same date code?
Is the problem seen on all rev V devices, or some of them are working properly?

Thanks,

Amel

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CLee.5.54 · ‎2019-05-26

Hello Amel

please find the information in my attachment. I put a part of schematic and internal test information in.

Under our test that connect external module on 5 times, Defect rate is about 85% ( 13 defect / 15 samples ).

Amel NASRI · ‎2019-05-27

Hi Chikang,

The attachment is well received. It will be reviewed by our experts.

Would it be possible to complete the marking of other devices (rev V)?

Thanks,

Amel

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.

CLee.5.54 · ‎2019-05-31

Hi Amel,

There are markings of MCU below. "8" and "B" are confusing when i read those. Looks very similar.

STM32F205ZGT6 7B227 VG PHL 7B811

STM32F205ZGT6 7B483 VG PHL 7B723

STM32F205ZGT6 7B836 VG PHL 7B713

STM32F205ZGT6 7B242 VG PHL 7B812

Thanks you