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RTOS/cc1310: sniff mode standby mode current

xi zhu
Prodigy 130 points
Part Number: CC1310

Tool/software: TI-RTOS

HI, i am working with the sniff mode based on example rfWakeonRx.
When i measure the current of the RX process,i find that the current will fall from 6mA to 1mA sometimes, and i guess that the modul enter the standby mode before the next packet arrives,cause in the code of sdk/kernel/tirtos/packages/ti/dpl/PowerCC26XX_tirtos.c standbypolicy function it says if time to next interrupt larger than latency time,the modul will enter standby mode.
But what i've read in datasheet,the standby mode current is about 0.8uA and cant be 1mA.
Did the modul enter idle mode?Or there is some other reasons?

Thats the current data i've measured in 10s.(mA)                                                                                                                            

6.7
6.8
5.7
5.3
4.8
4.9
6.6
6.9
1
2.8
6.2
6.1
6.4
6.6
6.9
1.9
1.7
5.2
6.6
6.8
6.4
5
4.3
4.6
6.7
6.9
1.2
3.5
6.1
6
6.3
6.6
6.9
1.4
1.9
6
6.5
6.7
4.6
3.8
4.6
6.7
  • 0
    TI__Guru**** 317180 points
    - Which hardware are you running the code on?
    - Have you modified the example?
    - Please provide a plot of the measurement
    - How have you done the measurement?
  • 0 in reply to TER
    Prodigy 130 points

    -CC1310 Launchpad

    - I send the packet from rfWakeonTx and have modified this example with 0.01s send interval.

    -I connect the launchpad to the external power,separate the Debugger(remove jumper) and measure the current with multimeter in series Connection.The current data are read from multimeter in 30s(with the video recorded).

  • 0 in reply to xi zhu
    TI__Guru**** 317180 points
    Could you try the same measurement but with 100 ms or more between wakeups?

    For this type of measurement you should use a scope and measure the voltage over a resistor. It could be that the multimeter do some sort of averaging over a few samples. Also if the wakeup interval is 10 ms, why do you measure over a 30 s periode? Are you able to see the minimums?