Assert COEX0 without internal GPS on

RE: Assert COEX0 without internal GPS on

Didrik Rokhaug — Thu, 16 Dec 2021 10:11:28 GMT

No, there is no way for the application to control the COEX0 pin directly.

And the modem doesn't know about the external GPS module, so it cannot set the COEX0 pin when the external GPS is running.

The only plausible solution I can think of, would be if you can configure the COEX0 pin to be high when you are not using LTE, and only run the GPS when you are not using LTE. But, I haven't checked if this is possible, and it would also mean that the LNA is left on when both the GPS and LTE is sleeping, which will consume extra power.

RE: Assert COEX0 without internal GPS on

dsmith115 — Wed, 15 Dec 2021 14:33:28 GMT

Hi Didrik, unfortunately I already have a custom board with the COEX0 pin connected to the external LNA. I am trying to determine if there is a software solution to assert the COEX0 pin without turning on the nRF9160 GPS.

RE: Assert COEX0 without internal GPS on

Didrik Rokhaug — Wed, 15 Dec 2021 12:47:25 GMT

Hi,

The COEX0 pin is controlled by the modem, which doesn't know what the external GPS module is doing.

Instead of the COEX0 pin, you can use one controlled by the application, or if available, one controlled by the external GPS module.

Best regards,

Didrik