CRCERROR and REGULATORS ON nrf5340-PDK

[emag nioj]

Hi, I m sending a packet in mode Nrf_1Mb to another board nrf5340-PDK.

When I try to enable   NRF_REGULATORS_S->VREGRADIO.DCDCEN=REGULATORS_VREGRADIO_DCDCEN_DCDCEN_Enabled;

The RSSI is sampled and it's ok but the CRC signals ERROR.

Using the LDO the CRC results always OK. What's wrong!

Thank you!
Emag

[Simonr]

Hi Emag

We do not suggest using the DCDC on the current revision of the nRF5340, as there are some issues with it in the current revision. This will be fixed in later revisions, and keep in mind that this is an engineering revision. Please take a look at the nRF5340 errata document, and especially erratum 64, which states that DCDC mode can't be enabled in the VREGMAIN regulator when CPU is running.

This erratum also proposes a workaround that is implemented in MDK versions 8.30.0 and later. My suggestion is to use the LDO regulator with the current revision of the nRF5340.

Best regards,

Simon

[emag nioj]

ok thanks, i was applied the workaroung suggested in the errata but without effetcs.

LDO is ok thanks!