Custom PCB not detected/programmed

[Watermelon]

Hello,

I created a custom board with the BMD350 module (it has a nRF52832 chip), and I a trying to program it with the BMD300 eval board.

The module on my custom board is powered with 1.8V and I've made the following connections:

• SWDIO  -  SWDIO
• CLK  -  CLK
• nRST  -  nRST
• GNDd  -  GND
• Vref  -  1.8V

But my laptop is not detecting my custom board (it just programs the eval board).

Is there anything I am doing wrong?

I have attached a picture of my setup, I circled my custom board and the eval board and showed the path of my connections with the blue line.

Thank you!

[Einar Thorsrud]

Hi,

It might be that the programmer has problems programming the device when it uses such a low supply voltage. Can you try to supply the module with approximately 3 V while programming it?