• State TI Thinks Resolved
  • Locked Locked
  • Replies 5 replies
  • Answers 1 answer
  • Subscribers 53 subscribers
  • Views 678 views
  • Users 0 members are here
Support feedback
Options
Options
Related

This thread has been locked.

If you have a related question, please click the "Ask a related question" button in the top right corner. The newly created question will be automatically linked to this question.

LAUNCHXL-CC1310: CC1310 Launchpad - Overconsumption in deep sleep

Aurélien Fillau
Expert 1710 points
Part Number: LAUNCHXL-CC1310
Other Parts Discussed in Thread: CC1310

Hello,

I'm using Contiki OS on my CC1310 launchpad eval board. I have deactivated the MAC by using "NETSTACK_MAC.off(0)". But i'm still having a power consumption of 8uA whereas the datasheet specifies 1uA. At the beginning, i was thinking it was coming from my external flash but it seems well intialized and i have unsoldered it to be sure. So, i don't know why my CPU is still consumming 8uA !

Am i missing something ?

If you have any ideas, feel free to share :)

Thank you in advance,

Best regards,

Aurélien

  • 0
    TI__Expert 6540 points
    Hi, did you remove all jumpers when measuring? Have you tried a standard standby example and verified that the device enters standby?

    dev.ti.com/.../
  • 0 in reply to FredG
    TI__Guru**** 317180 points
    Could you try the pinstandby example to simplify a bit?

    8 uA is typically current consumption caused by the external flash, I have not seen this type of current without the flash.
  • 0 in reply to TER
    Expert 1710 points
    Hi,

    Thank you very much for your replies. Actually, i had removed all jumpers excepted the TX (to have serial port) and the R (Reset). The TXD is not the reason of this overconsumption but i have noticed when i remove the reset jumper, consumption descreases and is very close of what i'm expecting (around 1uA) but when reset jumper is removed, i'm losing my serial port but the cc1310 seems to run normally.
    So, i don't know why i'm losing the TXD. If you have any ideas, don't hesitate.

    Regards,

    Aurélien
  • 0 in reply to Aurélien Fillau
    TI__Guru**** 317180 points
    If some of the jumpers are mounted that means that the signal is connected to the level shifter. I assume that some leakage or undefined levels could cause raised power consumption.

    Not sure why removing it impact the series bus since the level should be constant on this pin.

    But as said: If you want to measure the lowest power modes on a LP all jumpers has to be removed. In the lowest power modes the series interface it not used anyway.
  • 0 in reply to TER
    Expert 1710 points
    Hi,

    Ok, i will remove all the jumpers to measure the lowest power modes. I will wait for my custom board that will be without the level shifter to see if i'm still having issues with the series interface.

    Best regards,

    Aurélien