i.MX Processors中的主题 Re: Queries on IMX6ULL processor GPIO pin.

Queries on IMX6ULL processor GPIO pin.

ramesh6663 — Fri, 19 May 2017 05:13:07 GMT

Hi,

Could you please let me know the Maximum drive current of IMX6ULL GPIO pin from Processor? I believe its >10mA.

So please confirm

Thanks

Re: Queries on IMX6ULL processor GPIO pin.

Yuri — Fri, 19 May 2017 05:45:19 GMT

Hello,

The GPIO buffer load capacity is not specified in units of current. It is specified in terms of buffer drive strength or output impedance. For example, refer to the Section "GPIO Output Buffer Impedance" of the i.MX 6ULL Data Sheet(s).

IBIS models may be used to estimate current.

https://community.nxp.com/message/395489

Also, the total load current and power dissipation should be taken into account when calculating the GPIO power budget.

Have a great day,
Yuri

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

Re: Queries on IMX6ULL processor GPIO pin.

ramesh6663 — Fri, 19 May 2017 06:37:21 GMT

Thanks Yuri,

I am just using Ohms law to determine the current for the GPIO when its 3.3V IO logic, Drive current form 20mA to 140mA as per "4.8.1 Single Voltage GPIO Output Buffer Impedance" in the datasheet. Am i right?

And we are going to use GPIO in sourcing power to the LED for Indication use case.

Thanks,RK

Re: Queries on IMX6ULL processor GPIO pin.

Yuri — Fri, 19 May 2017 07:08:07 GMT

Hi,

You should take into account LED volt ampere characteristic.

https://community.nxp.com/message/381665

Regards,

Yuri.