Board Did not detected

RE: Board Did not detected

Hung Bui — Mon, 04 Feb 2019 09:44:52 GMT

You meant you only connect VDDH and not powering the chip using VDD_nRF ? Which voltage do you provide to VDDH ?

Could you send the schematic, layout and a close up photo of your board ?

RE: Board Did not detected

Alan Ajit — Mon, 04 Feb 2019 05:36:06 GMT

commander means j link comander. we not powering VDD_nRF. we mean we measured power at VDD-nRF its around 2.5 V . we have two 840 chip in same board . both are powered in 3.3V. one is work perfrctly. other has some problems that is we cant flash program to other chip. Both chip design are same.

Is it any Hardware issue like soldering issue or anything?

RE: Board Did not detected

Hung Bui — Thu, 31 Jan 2019 14:07:41 GMT

Hi Alan,

Could you describe a little bit more on "when i connected to the commander the board is not detecting". What did you mean by commander ?

Do you have any programmer connect to the SWD interface of the board ? Please be aware that the chip comes without any bootloader so you would need to have a programmer to program the chip.

How do you provide power to VDD_nRF ?

Please share your schematic , layout and a close up photo of your board. You can convert this thread to private by click "Go Private"

RE: Board Did not detected

Hung Bui — Thu, 31 Jan 2019 14:07:24 GMT

Hi Alan,

Could you describe a little bit more on "when i connected to the commander the board is not detecting". What did you mean by commander ?

Do you have any programmer connect to the SWD interface of the board ? Please be aware that the chip comes without any bootloader so you would need to have a programmer to program the chip.

How do you provide power to VDD_nRF ?

Please share your schematic , layout and a close up photo of your board. You can convert this thread to private by click "Go Private"