nrf52840 soft reset cause

[katrindqaws]

hi

how i can get a log for why nrf52840 is reset when start advertising for bluetooth?

the reset register is 4

can i get more information from log?

how?

thank you

[simoiamma]

I think it may be better to have an image of the routing of the traces of the 32MHz crystal than the schematic.

I'm also having issue with external crystals, one possible cause could be too much heat transfer when soldering the crystal component.

Simone

[katrindqaws]

[simoiamma]

I'm not an hardware designer expert, but I don't see obvious error like too long or overlapping traces. Maybe the crystal is broken or soldered badly or with incorrect orientation, do you have the option of replacing it? 

[katrindqaws]

i tested another PCB (of this circuit) but does not work

if crystal is soldered incorrect orientation it should work because XC1 or XC2 is same to each other for rotate.

[simoiamma]

Do you know the process and at which temperature the board was soldered? Has the board been washed using ultrasonic cleaner?