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Minum requirements to flash NRF52840 on custom board

enny

Hello,

I have created a custom board that uses a NRF52840. 

From my understanding, i'm need only VDD,GND,SWDIO and SWCLK connected to the SOC to flash them by using an erxternal J-Link.

But i have no succes. So i will ask there, what are the minimum circurit requirements to flash the SOC. 

Please Help.

Regards Enny

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  • 0

    As says, you need decoupling capacitors according to the reference layout, and to power the chip from somewhere else, as the JLink won't power it by itself.

    If you're still not able to flash your chip, I would like to have a look at your schematics in order to see that everything is set up properly.

    Best regards,

    Simon

Reply
  • 0

    As says, you need decoupling capacitors according to the reference layout, and to power the chip from somewhere else, as the JLink won't power it by itself.

    If you're still not able to flash your chip, I would like to have a look at your schematics in order to see that everything is set up properly.

    Best regards,

    Simon

Children
  • 0 in reply to Simonr

    Hi Simonr, 

    I have try a board with the components Turbo J mention. No succes. The picture is a part of my schematic, adapted from Reference Layout 4 Version 1.1. Maybe something are wrong. Pleas check and recommend it. (i know ist not nice and easy to read. But not so mutch space on the sheet :-))

    Schematic_Snippet

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