Whats the function of "AUX - Single-ended 50 Ω ANT loop-back pin" ?

[Johan]

Hi,

We see that in documentation V1.1 there is this info on a pin added.

"AUX - Single-ended 50 Ω ANT loop-back pin"

What is the function of this pin?

Documentation doesn't cover it according to our engineers.

They need to know exactly what to do with it in the design.

/Johan

[ketiljo]

It goes to the internal switch matrix. It was initially intended to be used as a loop back to the GPS input in case where you have a common GPS and LTE antenna. But this feature is not used yet. So just leave it open.

[Johan]

Thanks, that helped our engineers.

They have another question I didn't yet add, also unclear from documentation:

"What are the maximum high level voltage for the COEX interface? Or is it part of any of the specified interfaces in table 114: Operating Conditions (PS v1.1)?"

[ketiljo]

The COEX interface have the same voltage as all other GPIOs. 

[Johan]

Thanks ketiljo