How to connect unused LDO supplies

[emil]

I'm currently working on the iMX6 SABRE-SD platform (Solo/DualLite). From what I can see the PF0100 configuration is in one of the pre-programmed configurations (although schematic states you use non-programmed PF0100), namely F0. In will not use a couple of LDO outputs in my final design, and would like to avoid programming the PF0100 myself.

Is it possible to use the pre-programmed F0 configuration even though all LDO's are not connected? How do I disconnect them? Do I just let them be NC? This would mean that the startup sequence would try to output a voltage from the LDOs, but not succeed.

Thanks for your help!

[weidong_sun]

Hello,emil,

      For those LDOs in MMPF0100 that you don't use, you can disable them by VGENxEN bit in software, and float those output pins on schematic.

      The following is a list of controlling register in MMPF0100, you can find it in datasheet:

Regards,

Weidong

[emil]

Hello,

Yes, I can disable them. But what I'm wondering is if it is a problem that I use a startup sequence that starts up these LDOs.

Best Regards,

Emil

[weidong_sun]

Hello,emil,

      Because those LDOs are not used, They don't affect power up sequence .

Weidong