upgrade sdk 1.9.1 to 2.0.0

[Ofir_A]

Hi,

We upgrade our SLM app from sdk 1.9.1 to sdk 2.0.0 and now when we try to look for GPS there is a reduction at the voltage from 3.3 to 2

what are we missing? what changes affect the gpio voltage?

[flaik-wayne]

Do you have two GPIOs driving in different directions? This is probably the only way a GPIO could change voltage, unless it is an analog output pin of some kind? Which pin are you referring to?

[Ofir_A]

Hi,

JONATHAN LL said:

Are you also getting 2.1V on any other GPIO's or is it just the COEX0?

All GPIO's

JONATHAN LL said:

Seems like the is something SW related

It is software related since if I go back to SDK 1.9.1 all works perfect

There is something different at SDK2.0.0 from 1.9.1 that is doing this and I don't know what and need help to figure this out

[JONATHAN LL]

This does sound strange, can you share more details on what is going on in you system?

What pins are directly controlling this regulator? 

What is the voltage on VDD_GPIO?

Can you share your schematic or parts of it? the 9160 section and the power section?

Do you have a nRF9160DK,  can you replicate the issue you are seeing there?

Regards,
Jonathan