nRF52832 custom board, chip not getting detected

[AshokY]

Hi Experts,

I am trying to design my custom board using nRF52832. I am using Segger jLink Mini EDU to connect/debug the chip/board.
I took Thingy:52 as reference and designed my board. Here are my details about board.

1) I verified voltages at rhe 52832 level and found ever thing is OK, pin48, 36, 13 are at 3.3 volts.
2) used both 32MHz and 32.768 KHz crystals.
3) I connected SWDIO and SWDCLK pins from 52832 to the Jlink Mini.

I am using nRFconnect V2.5.0 and Programmer Experimental to connect the board. When I tried to select the device, I could only get debug probe, no serial port was detected. I am using a fresh board here.

Can anyone let me know, what could be my problem?
Do I need to use any other SW/tool to get my board detected?
Will there be any problem in my board? if so, can anyone suggest any debug points ?

I can share my schematic, if needed.

Thanks,
AshokY

[Turbo J]

Your Jlink Mini probably does not support the serial port. It would also need additional wires to the NRF chip (RX and TX for the UART).

Speaking of wires: You need VCC (might be called VRef on the JLink) and GND in order to be able to talk to the NRF chip via SWD.

[AshokY]

my JLink does support SWD. I connected SWDIO and SWDCLK pins from JLink to the nRF52832.

I followed the diagram explained in the thread,

 https://devzone.nordicsemi.com/f/nordic-q-a/20536/programming-external-custom-nrf52832-board-using-nrf52-dk

to connect jLInk to the custom board.

Do I additionally need to connect serial port from custom board to flash boot loader to make it detected via SWD by JLink?

Thanks,

AshokY

[Turbo J]

Your choice of software seems weired, just use either the nrfjprog command line tool or nRFGo studio. Both support programming via SWD.

You can also use the JLInk Commander to manually check wether it can connect to the target MCU. I use this when I'm suspecting cabling problems.