NRF8001D/NRF8001C

[tilitililili]

Hello!

I have a problem with NRF8001 modules. I have two similar boards - one with NRF8001C and another with NRF8001D module. NRF8001C board works well, but NRF8001D board doesn't. The RDYN pin is always high. It seems like the module is off or the crystal oscillator can't start generating. The oscillators are the same on both boards. I tried different capacitors - it has no effect.

What is the difference between NRF8001C and NRF8001D?

Thank you in advance!

[Hung Bui]

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.

[tilitililili]

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).

[Hung Bui]

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 ?

[tilitililili]

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.

[Hung Bui]

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