Peak power, S132 SoftDevice, concurrent CPU + radio?

[samsonc]

Hi,

I've seen the results of the power profiler, but I'd like to confirm this - with no other concurrent user CPU processes (standby/sleep), is the S132 softdevice guaranteed to never have both the radio (RX or TX) on and CPU running? If they are sometimes concurrently on, what's the worst case scenario overlap time?

I understand that there are mechanisms through which my software can be notified of upcoming radio events, and I'm planning on ensuring my software (and external hardware) is in standby before any expected radio events.

Of course, this is for a power-constrained application.

Thanks!

[Simonr]

Hi

Sorry, but is it correct that you want to know if the radio is able to receive and transmit at the same time? The radio is not able to receive and transmit at the same time, so there should be no worst-case scenario in peak power in that regard. You can check out more information on how the radio in the nRF52 series works over at the Infocenter.

Best regards,

Simon

[samsonc]

Sorry if I wasn't clear - is it guaranteed by SoftDevice S132 that the SD software will *never* run both the CPU and radio at the same time (i.e. 3.9mA CPU + 5.3mA Radio)? Is the peak power with only the softdevice 27mW (radio + CPU) or is it 16mW (radio only)? If they overlap for some time (maybe the SD firmware has queued a TX request with the radio, and still has to do processing before going to sleep), how long is it?