NRF8001 RDYN Held High

[Matthew]

Hi I have built a custom NRF8001 board and I'm debugging a problem.

The main microcontroller works fine (atmega32u4) but the RDYN line never goes low to start the setup process. Does anyone know where to start debugging this? I'm pretty sure my circuit is correct, one thing I was thinking was the capacitors for the crystals might be too large. I scoped the crystals and they are not running, I assume though that the NRF8001 turns these on and off as it pleases. Is there a time that the crystals should definitely be on so that I can scope them?

Thanks for the help in advance.

Cheers,

Matthew

[Soren]

Hi Nordic folks,

I'm experiencing a similar problem and so the setup process is not successful. I'm able to send a few ACI packets but then the RDYN line is held high and does not respond when I set my REQN low for more ACI commands.

I checked my nRF8001 by changing the operation mode from Setup to Test and sending the Echo command, and I successfully received the EchoEvent. So the chip should be fine.

Any idea why nRF8001 keeps the RDYN line high after a few ACI packets and does not recognize that I set my REQN low?

Cheers, Soren

nRF8001-ACI.JPG