EVENTS_HFCLKSTARTED never triggered but oscillator seems to be correct part.

[cory123]

I'm running the esb_ptx_pca10040e on a custom board with NRF52810. The program gets stuck on....

 while (NRF_CLOCK->EVENTS_HFCLKSTARTED == 0);

This appears to be similar to Case ID: 233382. I know that if the crystal or crystal caps are out of spec or not soldered correctly that could prevent the high freq clock from starting. I was concered my crystal was the problem so I bought a different crystal....

https://www.mouser.com/ProductDetail/732-FA12832.F10Z-AJ3

My program is still getting stuck on the same line. Compared to the reference design the only difference appears to be the size of the capacitors on the crystal. I'm using 0201 12 pF caps whereas the reference uses 0402 12pF caps. Is this causing the crystal to not operate correctly? Thanks.

[Andreas]

Hi,

 

This is a well known crystal that should be starting no problem starting even if the crystal is incorrectly loaded. Is this only 1 board/unit of the same design or do you see it across multiple? Have you checked that there are no shorts and that the crystal is mounted the right way (i.e. not 90 degrees off)?

 

Best regards,

Andreas

[cory123]

I just found out yesterday that my footprint was wrong. I had the top left and bottom right pads connected to the NRF52810. It should be the bottom right and top left. This became clear when comparing my board layout with the reference design layout. Thanks for your help.