Unused PMIC_STBY_REQ pin recommendation in i.MX6SL

[ko-hey]

Hi all,

I have a question about recommendation of PMIC_STBY_REQ when it unused.

I'll not use the function of PMIC_STBY_REQ so I want to know the recommendation.

I can' find any recommendation about it in hardware design guide for i.MX6SL.

https://www.nxp.com/webapp/Download?colCode=IMX6SLHDG

On the other hand, I found a recommendation about it in hardware design guide for i.MX6Q.

It says that If unused, the signal should be left unconnected:

https://www.nxp.com/webapp/Download?colCode=IMX6DQ6SDLHDG

Can i.MX6SL leave it unconnected same as i.MX6Q ?

My concern is those signal type is different.

i.MX6Q is open-drain output.

i.MX6SL is push-pull output.

Ko-hey

[joanxie · Accepted solution]

Generally  unused output pin recommendationscommon for all i.MX procesors :

DIGITAL OR ANALOG OUTPUT RECOMMENDATIONS Leave the unused output pins floating. so just let it free