topic Queries related to GPIO pin of IMX6ULL processor? in i.MX Processors

Queries related to GPIO pin of IMX6ULL processor?

ramesh6663 — Thu, 01 Jun 2017 06:09:43 GMT

Hi,

What is the maximum drive current of the GPIO pin of IMX6ULL processor?

Please let me know your comments on LED circuit connection diagram as shown below

Re: Queries related to GPIO pin of IMX6ULL processor?

Yuri — Thu, 01 Jun 2017 06:36:15 GMT

Hello,

Please refer to the following :

Queries on IMX6ULL processor GPIO pin.

Perhaps it would be better to connect the LED to a supply and then to the GPIO,

where driving a low on the PGIO will turn it on.

Have a great day,
Yuri

-----------------------------------------------------------------------------------------------------------------------
Note: If this post answers your question, please click the Correct Answer button. Thank you!
-----------------------------------------------------------------------------------------------------------------------

Re: Queries related to GPIO pin of IMX6ULL processor?

ramesh6663 — Thu, 01 Jun 2017 07:08:02 GMT

Hi Yuri,

Thanks for your response. As per my understanding GPIO pin maximum current should be 7.5mA. So the LED which I used has Vf=2V, If=20mA as per the current limiting calculation I used 3 times more resistor value 240 ohm so allowable current is 5.4mA to ON the LED with low intensity. So this circuit will work and I am worrying to use GPIO pin as sinking to the load (connect the LED to a supply and then to the GPIO). It may cause the more leakage current on the particular IMX6UL GPIO pin.

Do you have any technical concern on this?

Thanks

Ramesh

Re: Queries related to GPIO pin of IMX6ULL processor?

Yuri — Fri, 09 Jun 2017 06:43:14 GMT

Hello,

Strictly speaking, it is needed to solve non-linear equation, using IBIS data.

Please look at considerations in the following thread :

IMX6 IOMUXC Pad Control Drive Strength Field (DSE) - current vs voltage

Regards,

Yuri