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Port initialization of iMX6Quad

Question asked by TETSUO MAEDA on Jul 5, 2017
Latest reply on Jul 14, 2017 by TETSUO MAEDA

Hi everyone!

I have a question regarding the port initialization of iMX6Quad.

 

We are using iMX6Quad together with "MMPF0100" PMIC.

Around 10msec after the RESET is cleared, one of the port becomes "HI".

We think the reason is the 100kohm weak pull up.

Our software engineer tried to change the setting of this port to "pull down" using eMMC but it takes around 30msec to do so.

Are there any method to change the setting of the port more quickly after the reset is cleared?
We have to solve this problem at software because the hardware is already finalized.

We do appreciate any advice.

Regards,

 

Tetsuo Maeda

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