Hardware CSN handling in NRF52840

RE: Hardware CSN handling in NRF52840

MartinBL — Thu, 29 Mar 2018 13:41:02 GMT

SDK 15 was released last week. In the new drivers SPIM3 supports HW CSN. https://developer.nordicsemi.com/nRF5_SDK/

RE: Hardware CSN handling in NRF52840

Rob Philip — Wed, 28 Mar 2018 16:48:48 GMT

Hey..

I have this exact issue - only SPI seems to be implemented in the drivers, not SPIM (with CSN). Any ideas when the "next" SDK supporting SPIM with CSN will be available?

RE: Hardware CSN handling in NRF52840

MartinBL — Tue, 13 Feb 2018 11:38:36 GMT

Hi,

There is no HW CSN implementation yet and adding it to the current drivers and libraries would probably require a lot of work. The good news though, is that it will be implemented in the next SDK release which will be available in a not too distant future.

SPIM instance 3 (SPIM3) supports 16 MHz and 32 MHz frequencies. We had some struggles making it work in the earlier engineering IC versions and we considered to drop it. That is why the features are not properly documented yet.

Remember to watch out for the erratas: New and inherited anomalies.

-Martin