GPIO Always low

santhakumara — Mon, 01 Feb 2016 05:59:42 GMT

Hi,

I'm working with Custom designed iMX6 SOC based board. In that all the pins in GPIO section behaves always low.

even if trying to drive it high, it outputs 0.3 to 0.5V. but GPIO power rail is 3.3V.

Could anyone address what could be the issue..whether IC hardware failure..if so what cases it can happen..

thanks in advance.

Regards,

Santhakumar.

Re: GPIO Always low

Yuri — Mon, 01 Feb 2016 07:10:10 GMT

Hello,

Please check Your design, using recommendations of Chapter 8 (Avoiding Board

Bring-up Problems) of "Hardware Development Guide for i.MX 6Quad,6Dual, 6DualLite,
6Solo Families"

http://cache.freescale.com/files/32bit/doc/user_guide/IMX6DQ6SDLHDG.pdf

Also You may use the next "HW Design Checklist for i.MX6" to check the schematic themselves :

HW Design Checking List for i.MX6DQSDL

The following thread contains simple (LED) example in attachment,

that may be used as a GPIO test.

Integrating Processor Expert for i.MX and ARM GCC with Eclipse

Have a great day,
Yuri

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

topic GPIO Always low in i.MX Processors

GPIO Always low

Re: GPIO Always low