Hello,
I'm starting to design the pcb for the nrf52840.
I looked but I saw that it is also possible to create it on two layers instead of four as the reference design teaches us.
I am using kicad but I should understand the size of the tracks, vias and the grid to use.
I am having problems for more on the connection of pins f2 and d2, both according to most of the pcbs in circulation pass between c1 and g1 at layer 1.
But in the official kicad footprint this is not possible perhaps because it is set to accept 0.5 mm tracks.
It is possible to find the official footprint of the nrf52840 aqfn73 7x7.