CC2652R: CC2652R settings to adjust crystals of different specifications

Jason Lin

Part Number: CC2652R

Hi TI,

Can you please advise what setting must be adjusted if used different specifications of crystal as mentioned below?

CRYSTAL,SMT,32.768KHZ,7PF,20PPM(FREQ),-0.04PPM(TEMP),70KOHM,3.2X1.5,-40℃~,105℃,XTL721-A269-012

Thanks,

Jason.

0 Jason Lin over 1 year ago

Hi TI,

We're having a issue of sending HCI commands to the CC2652R,

sometimes no response at -40C.

We modified the software to disable the external 32.768KHz crystal,

and use the internal crystal instead, problem solved.

The problem seems to be related to the external crystal.

Currently we want to change the external crystal,

Wondering what settings must be adjusted?

0 Alexis Crandall20 over 1 year ago in reply to Jason Lin

Hi Jason,

Please refer to section 6 of SWRA640 for information on tuning the crystals:

SWRA495 is also another good resource:

Thanks,

Alexis

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