nRF54L15 BLE RX current comsumption

[loquat]

I measured the power consumption of the BLE RX using the nRF54L15.(nRF54L15-DK v1.0.0)
3.0V operation
apps: scan_adv (delete advertising)
west build -b nrf54l15dk/nrf54l15/cpuapp
proj.conf
CONFIG_BT=y
CONFIG_BT_BROADCASTER=y
CONFIG_BT_OBSERVER=y
CONFIG_LOG=n
CONFIG_SERIAL=n

Result: The average current consumption was 3.73mA.
This is 330uA higher than the 3.4mA stated in the datasheet.
Is this correct behavior? Is further processing required to reduce it to 3.4mA?

[Simonr]

Hi

So, I discussed this with a colleague, and the extra ~300µs seems to be the Constant Latency mode being used by the SoftDevice controller. This can be seen by reading the CONSTLAT status register with the following command for example: nrfutil device read --address 0x5010E520 --direct

It is the MPSL that handles the low latency states on behalf of the SoftDevice controller if I recall correctly, so documentation on that can be found here and in the nRF54L15 datasheet.

Best regards,

Simon