connections for unused ECSPI pins

[egirl]

Hi, 

I'm using i.MX6Solo and DualLite.

When we choose ECSPI func with MUX but don't use ECSPI pins,
can we leave unconnected them?

ECSPI_SS
ECSPI_SCLK
ECSPI_MOSI
ECSPI_MISO

For MISO pin, I think i can set Internal PU 100k.

Thanks in advance!

[AldoG]

Hello,

It is not a good idea to leave digital pins left floating since it could draw power, pull-up/pull-down should be enough as you have said.

Even if you're not planning to use it at all you may disable the interface in the dts.

Best regards,
Aldo.

[egirl]

Dear Aldo,

Thank you for your replay.

I see. Even if the pin setting is output, it's better to set pull-up/pull-down, right?

Then, if we set internal Pull-up/Pull-down setting for all pins, we can leave unconnected ECSPI pins in the hardware point of view.
Is my understanding correct?

Best Regards,

[AldoG · Accepted solution]

Hello,

Yes, you're correct for both of your questions.

Best regards,
Aldo.

[egirl]

Dear Aldo,

I got it.
Thank you so much!

Best Regards,