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Lucast · 2024-04-15

Hi everyone,we're using the STM34F407ZG microcontroller in our BMS board.We have some issue during contact 8kV ESD applied in some screws above the boards. The ESD are applyed on all the screws but the problematic one are just 3 screws, the closest s...

Lucast · 2024-11-06

I can replicate the ESD test in my lab now.I see that with ESD compliance to IEC 61000-4-2, at level of 1,8 kV the MCU start to:block itself but the IWDT reset the board when triggered;sometimes, most frequently with high level ESD, the MCU freeze an...

Lucast · 2024-04-16

@Tesla DeLorean wrote:I suppose if the whole chip latched-up the IWDG could be impacted, but how are you kicking it normally? Do you toggle an LED when you kick it, so you can see that it' has stopped internally?Do you have an external watch dog? Any...

Lucast · 2024-04-15

It is not so obvius the coupling method of the ESD. It is possible the coupling mechaninsm is by means of an RF field induced by the discharge.Since it is not a destructive phenomena, I think is a good "starting point" to put all the unused pins in p...

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ESD and MCU freezing

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Re: ESD and MCU freezing

Re: ESD and MCU freezing