We’re developing with the nrf52840, and we’ll need to add a header on the PCB to attach a programmer / debugger. Is there an application note that describes that? I don’t see much detail on that in the product spec.
Hello eschafer,
Welcome to the DigiKey TechForum.
Are you talking about the
Can you elaborate on what you’re trying to accomplish? What type of details are you looking for in application notes? There are other documents for the NRF52840 on that page under Documents & Media.
Not that device - we have our own hardware design that uses the nRF52840 chip, but I assume there are some pins that need to be exposed as a connector for a programming / debugging device that we would plug into it for development. Also need to know what device I need to get to do that.
Regards,
Eric
Hello @eschafer,
You don’t typically find app notes on this topic. If you need an example of making connections to the SoC for programming/debugging, I would suggest studying the eval board. It’s essentially a general purpose reference design. Nordic provides a description of the populated debug connector as well as the hardware design files.
As for compatible programmers/debuggers, you have a lot of options. I would suggest you start by considering the debug out capability of the NRF52840-DK eval board. Not only is this a cost-effective solution for those getting started, you can also use the eval board itself for the initial development of your solution.
Thanks Matt.
I have the eval board, so it would be perfect if I could use that - I see a ‘Debug In’ and a ‘Debug Out’ connector; I assume the Debug out would connect to my custom board? I would just need to add a ‘Debug In’ connector on my board - do you see the connector details? Connector type and signals from the nRF part?
Regards,
Eric
Yes, that’s correct.
For this, I’ll refer you again to the hardware design files. Just scroll down and download the .zip file. There, you’ll find the board’s BOM, schematic, gerbers, … everything you need to reproduce it.
According to the BOM, they used the 3132-10MS0BK00R5 connector from WCON for P18 and P19. WCON isn’t one of our suppliers, but we do carry several suitable crosses.
Hope this helps.
Here is the General PCB design guidelines for nRF52 series. General PCB design guidelines for nRF52 series - nRF5x - Hardware design, test and measuring - Nordic DevZone This includes recommended SWD interface connections, pin layouts, and routing suggestions for signal integrity. The nRF52840 DK board files contain a complete schematic, including how Nordic connects the SWD interface to the debugger. nRF52840 DK - nordicsemi.com Here is also a nRFMicro/Pro Micro compatible Bluetooth LE board. This may give you some idea too. MDBTMicro-50Q - Share Project - PCBWay
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