Flashing nRF Chips on a single Development Kit

RE: Flashing nRF Chips on a single Development Kit

Simonr — Fri, 21 Feb 2020 06:48:06 GMT

Hi Dylan

For PCB design, please see the Hardware and Layout section of the product specification, as well as this application note on circuit board guidelines for aQFN packages (nRF52840s package format).

Please see section 8.10 Debug Output in the user guide. You can either use the 10-pin debug header P19 or the P20 header, connected to an external board like the picture below.

Best regards,

Simon

RE: Flashing nRF Chips on a single Development Kit

Dylan V — Thu, 20 Feb 2020 17:09:20 GMT

Hi Simon,

Thanks for your help. How would you suggest making the breakout board with the nRF chips? Would you recommend using a PCB design to accommodate the chip? If so, are there example PCB designs for the nRF chips available online?

I was looking through the DK user guide but was not able to find how to program external board. Where exactly in the user guide is this information provided?

Thanks for your help,

Dylan

RE: Flashing nRF Chips on a single Development Kit

Simonr — Thu, 20 Feb 2020 10:09:09 GMT

Hi Dylan

I suggest making a breakout board of some kind for your other chips where the SWD pins are accessible, (either one, where the chips can be replaced easily, or one for each chip) as there is no good way to easily replace just the chip on the DK. In the DK user guide, you can see how to program external boards using your DK.

When making a breakout board, you need the peripheral components from the reference circuitry in the PS to ensure proper operation from the nRF52840.

Best regards,

Simon