Available DPPI channel count after enabling BLE and MPSL

RE: Available DPPI channel count after enabling BLE and MPSL

Woosuk Lee — Wed, 24 Mar 2021 17:09:05 GMT

This is excellent news. I hope Nordic updates the info on the official materials (e.g., product specification) and the NCS soon in order to avoid further confusion to others interested in using it.

RE: Available DPPI channel count after enabling BLE and MPSL

Simon — Tue, 23 Mar 2021 13:56:01 GMT

If you use a revision newer than engineering A, you should have access to 32 DPPIs on the network core. If you use engineering A, you will only have access to 16 DDPI channels on the network core.

With your current SoC, you should have access to 32 DPPI channels on the network core.

https://infocenter.nordicsemi.com/index.jsp?topic=%2Fcomp_matrix_nrf5340%2FCOMP%2Fnrf5340%2Fnrf5340_ic_revision_overview.html&cp=3_0_3_0

The application core, however, have always had access to 32 DPPI channels.

Best regards,

Simon

RE: Available DPPI channel count after enabling BLE and MPSL

Woosuk Lee — Tue, 23 Mar 2021 05:06:14 GMT

Is there any update from Nordic? I am wondering if someone is looking into this.

RE: Available DPPI channel count after enabling BLE and MPSL

Woosuk Lee — Thu, 18 Mar 2021 07:44:08 GMT

I found a related question after submitting mine. According to the conversation in the question, it is true that 14 PPIs on the net-core are already reserved for the SoftDevice controller, leaving only a couple of them for free use. Given that the nrfx_dppi_channel_alloc() returns '15' after enabling MPSL together with the SoftDevice stack, I assume MPSL also reserves one of the remaining two, leaving only one DPPI to user application. Only one DPPI is definitely insufficient for me to implement my own feature.

Luckily, the verified answer to the question says that the newest version of the net-core should provide 32 DPPI channels. But, it does not reveal which IC revision to support the 32 DPPI channels among the three. The picture below shows the marking on the nRF5340 IC included in my nRF5340-DK. It looks like the build code is DB, indicating the revision of Engineering D.

How many DPPI channels on the net-core can I use on my DK? If the DB is not the newest revision that supports 32 DPPI channels on the net-core, where can I get the nRF5340-DK that has the newest IC revision (I got my DK from Mouser only a month ago)?