i.MX ProcessorsのトピックRe: RT117x: ADIN protection

RT117x: ADIN protection

ak2 — Mon, 20 Jun 2022 10:30:24 GMT

Hi,

Does the analog input pin with
   VREFH = 1.8V,
   CSACAL = 1 and
   3V3 GPIO_NVCC mode
need a protection against voltage levels above 1.8V or is a protection for values above 3.96V sufficient?

Thanks for the help!

Re: RT117x: ADIN protection

kerryzhou — Tue, 21 Jun 2022 03:01:47 GMT

Hi @ak2 ,

From the RT1170RM, we can know some information:

But, if you define CSACAL = 1, then it is Full scale (Factor of 1),

So, the input voltage should follow this table:

can't above 1.8V, thanks.

If the CSACAL = 0, you can input 3.3V.

Wish it helps you!

Best Regards,

Kerry

Re: RT117x: ADIN protection

ak2 — Tue, 21 Jun 2022 12:42:17 GMT

Thank you!

As you mention, I will set CSCALE to 0.