topic Re: Low/High width of GPIO input in i.MX Processors

Low/High width of GPIO input

takayuki_ishii — Thu, 25 Jan 2018 13:17:27 GMT

Hello community,

We hope to use a gpio input for external interrupt.

To detect low input as interrupt by GPIO module, how long does it keep low level?

How about rise/fall edge detect setting?

The other hands, we hope to know how long it must keep Hi/Low level

for general purpose input signal?

It has a same question in this thread.

About GPIO external interrupt

But no answer it have.

Don't you have some information about it?

Best regards,

Ishii.

Re: Low/High width of GPIO input

takayuki_ishii — Mon, 29 Jan 2018 00:04:01 GMT

Hello community,

Does anyone have any information?

Best regards,

Ishii.

Re: Low/High width of GPIO input

Carlos_Musich — Tue, 06 Feb 2018 18:43:12 GMT

Hi Takayuki,

you may look in the datasheet for the Slew Rate parameter (E.g. Table 28 and Table 29 in IMX6DQCEC.pdf). This will indicate the time required for a signal to be considered a real value and that is the minimum time the signal must remain unchanged.

Regards,
Carlos
NXP Technical Support
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Re: Low/High width of GPIO input

takayuki_ishii — Wed, 07 Feb 2018 11:23:37 GMT

Hello Carlos,

Thank you for your response.

I will ask it to my customer.

Best regards,

Ishii.