HOW TO PROGRAM THE NRF51DK (only nRF IC) board using NRF52840 DK BOARD

[sharmelaraju]

Hi,

We need to program nRF5x IC, so for that we are trying to program in the DK boards. For this we are using nRF52840 dk board and nRF51822 dk board (where nRF51822 IC is isolated from the interfacing MCU). We tried programming using the below connection. The nRF52840 dk board is connected to PC using USB cable. 

 DK nRF51422 (P18 Debugg in connector) -> nRF52-DK (P20 connector)

SWDIO -> SWDIO

SWDCLK -> SWDCLK

VDD -> VTG (Shorted with VDD_nRF)

GND -> GND_DETECT on P20 and GND

The problem we are facing is we can't able to detect the nRF51822 IC in the segger. Kindly guide us in program the nRF IC. Whether the connector what we used for interconnection is proper.

[Jørgen Holmefjord]

Hi,

Is the nRF51 IC powered externally or from the nRF52840 DK? If it is powered externally, is it running at the same supply voltage level as the nRF52840 DK? The on-board J-Link on the DKs does not provide any level shifting features, meaning it will only be possible to program boards running at the same voltage level.

Best regards,
Jørgen

[sharmelaraju]

Thanks for the reply.

Sorry for late reply. we didn't power up the external board.

So we will try and let you know.

[sharmelaraju]

Thanks 

I have tried this method . this is working.

Thanks for your support.