NRF8001D/NRF8001C

RE: NRF8001D/NRF8001C

tilitililili — Wed, 07 Dec 2016 12:43:12 GMT

Here is the case ID - 33196

RE: NRF8001D/NRF8001C

Hung Bui — Wed, 07 Dec 2016 09:54:18 GMT

Hi Tili,

Could you open a support case on our support portal (Mypage) and send me the case number ? I will get our QA staff to handle further, it sounds more like an issue with the batch.

RE: NRF8001D/NRF8001C

tilitililili — Tue, 06 Dec 2016 18:41:27 GMT

I've added the photos. I'm sure in components, because I have about 8 boards of each group and the behavior of the boards inside each group is the same...

RE: NRF8001D/NRF8001C

Hung Bui — Tue, 06 Dec 2016 08:40:24 GMT

It's pretty strange. Could you please send us closeup photos of a board in group 2 and one in group 3 ? Have you made sure all other components are the same ? Maybe you can try to change the chip on board group 2 with a chip from group 3, just to clearly prove it was the chip variant caused the issue ?

RE: NRF8001D/NRF8001C

tilitililili — Mon, 05 Dec 2016 18:23:32 GMT

I've discovered one more interesting thing. I have three kinds of modules:

NRF8001C
NRF8001D with part number 1447WJ
NRF8001D with part number 14030X (X = A, B...G). All of the modules from the first and the second groups work perfect. And all modules from the third group can't start working.

RE: NRF8001D/NRF8001C

tilitililili — Mon, 05 Dec 2016 16:34:08 GMT

I tried to mount a proper crystal from Olimex MOD-nRF8001 board, but nothing has changed... The NRF8001D modules can't start.

RE: NRF8001D/NRF8001C

Hung Bui — Fri, 02 Dec 2016 14:11:40 GMT

I would suggest to get hold of a proper crystal that match with the spec matches with the requirement at 14.1 in the nRF8001 spec.

RE: NRF8001D/NRF8001C

tilitililili — Thu, 01 Dec 2016 16:45:27 GMT

Unfortunately, I don't know... I have "Noname" crystals from aliexpress. I have three different types of crystals (HC-49S and SMD packages) - the NRF8001C board works good with any of them.

RE: NRF8001D/NRF8001C

Hung Bui — Thu, 01 Dec 2016 08:43:54 GMT

@tilitilili: Could you also let us know part number of the crystal you are using ?

RE: NRF8001D/NRF8001C

tilitililili — Wed, 30 Nov 2016 19:49:49 GMT

The first is: NRF C 8001 1147AA

And the second is: NRF D 8001 14030C

RE: NRF8001D/NRF8001C

David Edwin — Wed, 30 Nov 2016 19:47:19 GMT

What are the chip markings on top of the nRF8001C and nRF8001D ICs ?

RE: NRF8001D/NRF8001C

tilitililili — Wed, 30 Nov 2016 14:30:47 GMT

Yes, of course

RE: NRF8001D/NRF8001C

Hung Bui — Wed, 30 Nov 2016 14:28:00 GMT

For some reason I couldn't load the file you posted on yadi.sk could you edit your question and add the photos there ?

RE: NRF8001D/NRF8001C

tilitililili — Wed, 30 Nov 2016 13:40:07 GMT

Here are the PCB and schematic: yadi.sk/.../VCaiZQafzqciL yadi.sk/.../kNn1k2aHzqcmS

The штзге voltage is near 3 V. I've noticed that after setting RESET pin high there is a voltage (near 1.5 V) on the XC1 and XC2 pins on NRF8001C chip. But on the NRF8001D board these pins are always 0V.

RE: NRF8001D/NRF8001C

Hung Bui — Wed, 30 Nov 2016 13:13:42 GMT

It could be an issue with the hardware, you sure provided the chip with correct voltage ? Could you send the schematic and photo of the board ?

RE: NRF8001D/NRF8001C

tilitililili — Wed, 30 Nov 2016 12:55:08 GMT

Thank you for your answer and the link!

My device doesn't come to initialization process, because it doesn't pass start-up procedure (setting reset high and getting RDYN low).

RE: NRF8001D/NRF8001C

Hung Bui — Wed, 30 Nov 2016 09:41:03 GMT

You can have a look here at the answer from David Edwin.

But it's a little bit strange that it works on nRF8001C but not nRF8001D. But you can try to generate the configuration in nRFGo Studio you must select the correct setting in the Device drop down list on top left.