Using COEX0 to switch 3V3 supply to external GPS

[dennisnguy]

How can I use COEX0 pin as a GPIO to enable the 3.3V for using an external GPS?
I would like to set COEX0 pin to high as an GPIO.
Thanks in advance

[Ressa]

Hi,

Do you want to use an external complete GPS module or controlling external LNA/GPS active antenna ? 
Have you looked at this guideline (How to use the nRF9160 Feather - Blogs - Nordic Blog - Nordic DevZone) for using GPS module on nRF9160 ? It covers how to enable and use COEX0 pin for controlling GPS module. 

[dennisnguy]

I want to use an external complete GPS.
Thanks for the info for using GPS module on the nRF9160, I'll keep it in mind and use the info when I need it.

[Ressa]

Hi, 

Thanks for clarification, COEX0 can not be used as a general purpose GPIO (independent of Modem) as it is managed by modem. You can use it for controlling external LNA/ Active antenna supply during GNSS reception. However if the internal GNSS is not used/disabled, then COEX0 will be inactive(0).  

[dennisnguy]

Thanks Ressa for the information.