topic An equivalent circuit of GPIO_EMC about RT1021 in i.MX RT Crossover MCUs

An equivalent circuit of GPIO_EMC about RT1021

Edgard — Mon, 19 Feb 2024 10:28:42 GMT

Dear an Engineer in NXP,

I would like to know the equivalent circuit of GPIO_EMC pin.
Because I want to check the input mechanism.

Recently, GPIO_EMC_41 was broken, I think the electrical over stress (EOS) occurred to the pin.
I will put the 100 ohm resister close to pin in order to protect the pin from EOS.

But I wonder if the value of resister is large or not...

Thanks in advance.

Kindest Regards
Edgard

Re: An equivalent circuit of GPIO_EMC about RT1021

EdwinHz — Wed, 21 Feb 2024 21:25:46 GMT

Hi @Edgard,

Application Note AN5078 describes everything relating the pins on our MCUs. With respect to ESD and EMC protection, please look into AN10853.

BR,
Edwin.

Re: An equivalent circuit of GPIO_EMC about RT1021

Edgard — Thu, 22 Feb 2024 10:21:13 GMT

Hi @EdwinHz

thanks, I checked the App.Note you mentioned.

Kindest Regards
Edgard