Is it possible establish connection without external 32.768K crystal on CC26xx

Kimi Hu

Hi all,

I modify ccfg.c to enable advertising without external 32.768K crystal, but this advertising can not be connect when POWER_SAVING is enabled. Is it possable establish a connection without external 32.768K crystal(enable POWER_SAVING)?

thanks

over 10 years ago

0 Johan Gustafsson over 10 years ago

TI__Expert 3240 points

Hi,

We have built in SW functionality to calibrate the LF RC oscillator to get the needed accuracy for this oscillator. With this this calibration enabled you should be able to establish a connection without the external 32.768 kHz crystal.

You can enable this calibration by adding this line in the appBLE.cfg file:
Power.calibrateRCOSC = true;

Also the modification in ccfg is needed, as you already have done.

NB:
Please refer to the errata regarding the 32 kHz RC Oscillator:
www.ti.com/.../swrz058.pdf

Regards,
Johan

0 Kimi Hu over 10 years ago in reply to Johan Gustafsson

Mastermind 6105 points

Hi John,

thank you for your help. It works.

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Is it possible establish connection without external 32.768K crystal on CC26xx