Confused on NRF52840 SoC Revision and SD Support

[jschuld]

Hi,

I've ready many threads and docs on NRF52 SoC Revisions and Softdevice support but I am still confused. So apologies if I ask something which is already asked.

From the SoC and Softdevice support matrix I conclude that for the NRF52840, SD 7.2.0 (S140) is only supported from SoC revision 2 and onward. (https://docs.nordicsemi.com/bundle/comp_matrix_nrf52840/page/COMP/nrf52840/nRF52840_ic_rev_sdk_sd_comp_matrix.html)

However, when selecting the revision on the "compatible downloads" page for soft devices, It shows that 7.2.0 is supported even for Rev 1 SoC's  (Cx0) (https://www.nordicsemi.com/Products/nRF52840/Compatible-downloads)

When you select an older version (i.e. Engineering revisions) the suggested version changes to 6.1.0 so there is clearly some logic going on.

I started looking into this as I found by chance that our binaries worked fine on Rev 1 SoC's eventhough we are using SD7.2.0. I understand this may be a fluke, but am I still a bit confused with the information that is available by Nordic?

Thanks

Johan.

[Hung Bui]

Hi Johan, 
Please follow the compatibility matrix. I don't think the website compatible tab has all the version listed most likely it would just list the latest version of S140 when you select Cx0. I will report this internally. 

As far as I know, the reason S140 v7.2.0 doesn't support revision 1 is that it has not been tested with revision 1 and it may not have all the bug fixes (for the erratas) implemented for revision 1. 
So you application may work but we don't recommend and can't guarantee that it would be 100% compatible.