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CC2340R5: Additional consumption when generating advertise

Part Number: CC2340R5

Tool/software:

Hi all,
The following were used to prepare the project: SDK 8.40, CSS 12.8.1, basic_ble.
Sysconf settings: 
Device role: peripheral + central
General config:
Read Period (ms) - 4000
Central config:
Scan Interval  (ms) - 10
Connection Interval (ms) - 100

Energy consumption is controlled by the application - STM32CubeMonitor-Power

After starting the device (my own implementation), I observe the following consumption state

Tell me, what are these unknown pulses that appear on the consumption panel?
Moreover, they are strictly tied to advertising. I assume that this is the Rx radio channel working.
If I prohibit the formation of advertising, then the unknown pulses disappear along with the advertising.
If I change the frequency of advertising, then the frequency of unknown pulses does not change.
I see similar pulses on other devices implemented on CC2642 and CC2652.
Is it possible to somehow remove these pulses (consumption) or reduce their number?

  • Hello Ivan,

    What you are seeing is most likely the recharge pulses. The current consumption in Standby mode consists of two parts: a recharge current pulse, used to charge up the VDDR capacitor, and the current consumption between the recharges. The latter is around 70 nA, almost too small to measure. It is the average power consumption during Standby including recharge that is defined as the Standby current, approximately 700 nA, as stated in the data manual for the device.

    BR,

    David.