Because of the holidays, TI E2E™ design support forum responses will be delayed from Dec. 25 through Jan. 2. Thank you for your patience.

  • State
  • Replies 1 reply
  • Subscribers 51 subscribers
  • Views 65 views
  • Users 0 members are here
Support feedback
Options
Options
Similar topics

CC2340R5: Advertising fail at -40°C and DCDC Adaptive peak current control settings

Titouan Pineau
Prodigy 30 points
Part Number: CC2340R5

Tool/software:

Hi TI Team,

I'm running a low temperature advertising test on the CC2340R5.

When our design receives a low frequency (LF) trigger, the CC2340R5 starts advertising.

After advertising, we use a smartphone and an app to connect to our design and 'indicate' to stay connected.

Our design is powered by a desktop generator tuned to 2.75V.

This test works fine but if we reduce the temperature of our design CC2340R5 at -40°C:

The LF trig is received, the CC2340R5 starts advertising and suddenly stops and we have 4-5mA consumption during a few seconds. This problem appears sometimes and sometimes not. (Picture of the problem below)

And if it doesn't appear, it appears when we "indicate" to stay connected.

What is the cause of this problem?

At -40°C, the average consumption of CC2340R5 ble operations decreased.

I wonder if it could be the DCDD settings. I have read 14.2.2 on CC23xx TRM and wonder if we can optimise the adaptive peak current control to prevent this.

 Best regards,

Titouan

  • 0
    TI__Mastermind 37420 points

    Hi Titouan,

    Thank you for reaching out. I have a few questions that may help us figure out what is going on.

    1. Which SDK version are you using?

    2. Are you using a custom project? Is this behavior reproduce able on an unmodified SDK example?

    3. Are you using a custom board or a launchpad? If using a custom board, then can you retest using a launchpad to see if the behavior is seen there as well?

    Best Regards,

    Jan