Problems with the SPI SCK on the nRF51822 in SPI Slave Mode

RE: Problems with the SPI SCK on the nRF51822 in SPI Slave Mode

Stefan Birnir Sverrisson — Thu, 12 Feb 2015 08:55:41 GMT

Hi Brian

I am glad that we have figured out the cause for your problem. I am looking forward to assist you with any potential future questions when you receive the new kits.

RE: Problems with the SPI SCK on the nRF51822 in SPI Slave Mode

James — Wed, 11 Feb 2015 16:31:10 GMT

Thanks Stefan for all your help. We've ordered more nRF51 development kits and made sure we have the third revision of the chip on them.

RE: Problems with the SPI SCK on the nRF51822 in SPI Slave Mode

Stefan Birnir Sverrisson — Wed, 11 Feb 2015 14:19:29 GMT

Hi Brian

Yes, I can confirm that you have the first revision of the nRF51 chip which does not have any SPI slave. I would recommend for you to get the nRF51 DK instead which has the latest nRF51 third revision.

RE: Problems with the SPI SCK on the nRF51822 in SPI Slave Mode

James — Tue, 10 Feb 2015 19:36:04 GMT

Hi Stefan,

Thanks for taking a look at my question. I checked my nRF51822 chip markings and I have the following nRF51 chip on my development board.

N51822 QFAACA 1230AA

From looking at the compatibility matrix and reading the nRF51822 PS v1.3 associated with this nRF51 chip revision it looks like this chip is Revision 1. So it doesn't have the SPI Slave peripheral. Can you please confirm this?

Thanks!

RE: Problems with the SPI SCK on the nRF51822 in SPI Slave Mode

Stefan Birnir Sverrisson — Tue, 10 Feb 2015 07:47:42 GMT

Make sure the two boards have the same ground. Also make sure that your PCA10001 board has revision 2 or revision 3 of the nRF51822 chip. The first revision did not have SPI slave, only SPI master. The nRF51 compatibility matrix maps nRF51 chip markings with nRF51 chip revision.