Nrf5340 custom board is not working

[Fabrice@]

Hi All,

I have design my customer board but after production nothing looks to work. i can program  the board through the Nordic board by using debug out. even a simple blinky app is not working i have tried also to send an Ecco through uart and nothing seems to work ,  please attached is my schematic

[ovrebekk]

Hi 

Good point from Ben. I don't see an external LF crystal in your schematic, so it could be that you simply need to enable the internal LF clock source. 

Regards
Torbjørn

[Fabrice@]

Hi Ben, 

Thanks by adding  these 2 configs lines i'm able to run the blynk code samples 

[Fabrice@]

Hi ovrebekk ,

We have a cystal here ... as mentioned by benwefers adding these 2 lines of config codes i'm able to run the blinky app. 

[ovrebekk]

Hi

Fabrice@ said:

We have a cystal here ... as mentioned by benwefers adding these 2 lines of config codes i'm able to run the blinky app. 

That would be the HF crystal, not the LF crystal. 

The HF crystal is mandatory, as it is required by the radio, while the LF crystal is optional. 

Good to hear that the tip from Ben solved the issue

Best regards
Torbjørn