System Off mode in between beacon advertisement

RE: System Off mode in between beacon advertisement

Simonr — Mon, 23 Nov 2020 10:23:05 GMT

Please check out the Force-OFF mode, which is used to make the network core go to system OFF and achieve the lowest possible current consumption

Best regards,

Simon

RE: System Off mode in between beacon advertisement

mariamb — Fri, 20 Nov 2020 15:29:58 GMT

Hi again,

We were trying to put the Network core to sleep as you pointed out, but we are not able to find its System OFF register direction in the documentation, apparently it only specifies the APPLICATION base addresses:

We wonder what the implementation would be like in case there is a register for it... From this list, how exactly would we wake the network core up from System OFF mode with the application core?:

• The DETECT signal, generated by the GPIO peripheral

• The ANADETECT signal, generated by the LPCOMP peripheral

• The SENSE signal, generated by the NFCT peripheral to wake-on-field

• A valid USB voltage on the VBUS pin is detected

• A debug session is started

• Pin reset

Or maybe we should use FORCE OFF mode instead? Is there any example available of any of this approaches?

Thanks again for your support!!

RE: System Off mode in between beacon advertisement

Simonr — Thu, 19 Nov 2020 12:53:28 GMT

The case you have linked to is rather old, so when it was written, the nRF53 was not even announced yet. The nRF53 has one big difference from the nRF52 and nRF51 series, and that is the fact that it has two cores. This means that, in the nRF5340, you can put the Network core that is running the radio and advertisements to sleep (System OFF) while the Application core is doing something else entirely, for example keeping a timer of when to wake the network core up.

Best regards,

Simon