Using COEX0 to switch 3V3 supply to external GPS

RE: Using COEX0 to switch 3V3 supply to external GPS

dennisnguy — Wed, 30 Jul 2025 12:21:42 GMT

Thanks Ressa for the information.

RE: Using COEX0 to switch 3V3 supply to external GPS

Ressa — Wed, 30 Jul 2025 09:11:17 GMT

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).

RE: Using COEX0 to switch 3V3 supply to external GPS

dennisnguy — Tue, 29 Jul 2025 18:24:56 GMT

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.

RE: Using COEX0 to switch 3V3 supply to external GPS

Ressa — Tue, 29 Jul 2025 12:14:44 GMT

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.