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Programming Custom nrf52811 board

user115974

Hi,

I´m making my own custom nrf52811 board, but I do have some questions about programming. I want to program it with the nrf52dk using p20. 

Now I did read that 3v is needed for external programming, but I'm using 3.3v to feed my uC. Is this a big problem? If it is I will change the output of my dcdc-converter on my PCB. 

An other question is, this is what I found about how to wire it:

1. VDD and VTG -> VDD (CustomBoard)

2. SWDIO -> SWDIO (CustomBoard)

3. SWDCLK -> SWDCLK (CustomBoard)

4. GND and GND_DETECT -> GND (CustomBoard)

Is this correct and is this all I need to know?

I don't want to makes mistakes on my PCB, otherways I must wait again till my PCB is printed.

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  • 0

    Hi,

    When using the nRF52DK for programming only 3V is supported. But you do not need to change the DC-DC converter on the custom board to 3V, as long as you power the custom board from the DK while programming. This can be done simply by connecting the VDD from the DK to the output of the DC-DC converter on your custom board, keep in mind that the custom board should not be powered by any other source when using this configuration.

    1. VDD and VTG -> VDD (CustomBoard)

    2. SWDIO -> SWDIO (CustomBoard)

    3. SWDCLK -> SWDCLK (CustomBoard)

    4. GND and GND_DETECT -> GND (CustomBoard)

    Is this correct and is this all I need to know?

    Yes. these are the only connections needed for programming a custom board using the nRF52DK

    I don't want to makes mistakes on my PCB, otherways I must wait again till my PCB is printed.

    You can get a hardware review from one of our hardware engineers by creating a private case and providing the schematic and PCB layout files.

     

    Best regards,

    Bendik

  • 0 in reply to user104202
    user104202 said:
    This can be done simply by connecting the VDD from the DK to the output of the DC-DC converter on your custom board, keep in mind that the custom board should not be powered by any other source when using this configuration.

    Will it work if I connect the VDD eand VTG to each other on the PCB?

  • 0 in reply to user115974

    Yes, as long as VTG is connected to VDD it will work.

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