Old nRF9160-DK external GPIO header

[jongor]

Hello,

I am trying to observe communication between the nRF9160 and nRF52840 on v0.8.2 of the nRF9160-DK board.
According to the schematic and documents, P0.23 should be permanently routed to pin 3 of the P27 header on the board, regardless of the state of the analog switch as controlled by the 52840.

Communication is working (both chips communicate over UART via this and P0.22 lines) but nothing can be observed on the external GPIO header.
This works (to an extent) on v1.0.0 of the DK hardware so what is the issue with v0.8.2?

[jongor]

Never mind, after further study, I can see the pin actually routes via D16 label to TRACEDATA1. So it's either have the 52840 interface connected to P0.23 or have TRACEDATA1 connected to P0.23, not both.

This is very different from v1.0.0 of the hardware where the GPIO header is always showing P0.23 regardless of usage.