Is there a minimal reference design for the nRF52840 yet ?

[Roger Clark]

I know the PDK design is available for download, but there are a lot of things on that board which would not be required for a minimal e.g. beacon design

I'm looking for a minimal design with USB and NRF and 32kHz + master crystal and any of the other DC to DC that is essential, but nothing else

Or... Is it best if I try to work out a design from the PDK and send it to Nordic via their private support system ?

[Sigurd]

Hi,

In the Reference circuitry chapter in the product specification you can find 6 different reference designs, each based on what supply configuration you want. The most minimal reference design for the nRF52840 is configuration no.6. With configuration no.6 you have no support for High voltage mode, DC/DC function, USB or External circuitry supply. When choosing a reference design, you should first figure out what supply configuration you want in Table 1, and then use the corresponding reference design.

[Roger Clark]

Thanks I'll look at those designs

[Roger Clark]

Looking at those designs, I will need to do a hybrid of several designs as I need NFC and also need the ability to run from battery or USB (though not at the same time)

I will probably open a private support question via your other support system once I have designed the schematic, so that it can be checked for errors.

[Sigurd]

That sounds like a good idea. Attach Gerber files (or Altium files) and schematics in the support question, and we will do the review.

[Roger Clark]

Thanks.

I will probable need to send gerbers, because I use KiCad

But I will also send KiCad files, in case anyone at Nordic feels like installing this open source design package ;-)