• State Resolved
  • Locked Locked
  • Replies 3 replies
  • Subscribers 51 subscribers
  • Views 350 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.

CC2642R: External crystal for CC2642R

yousi Lin
Prodigy 70 points
Part Number: CC2642R
Other Parts Discussed in Thread: CC1312R

Can use an external crystal instead of the 48MHz crystal for the CC2642R?

  • 0
    TI__Guru** 106705 points

    Hi Yousi,

    I assume you mean external oscillator, right? As of now, we do not support external oscillators for CC26x2, only 48 MHz crystal. We are however working on adding support for this and it will be available sometime next year. For HW configuration you can look at the CC1312R LaunchPad reference design.

    Can you explain why you want to do this? Normally this is needed for better frequency accuracy with TCXOs, but since the CC2642R is not narrow-band crystals are sufficiently accurate. 

    Regards,
    Fredrik

  • 0 in reply to Fredrik K
    Prodigy 70 points

    Hi Fredrik,

    i interesting that the board CC26x2R wireless MCU LaunchPad™ had a 48MHz crystal.

    Than i found the CC2640R2_LAUNCHXL_tirtos_ccs examples . 

    In the PowerCC26XX.h had a Fxn [ . PowerCC26XX_switchXOSC_HF . ]

    so i try to switch the clock source to use external crystal.

  • 0 in reply to yousi Lin
    TI__Guru** 106705 points

    Hi Yousi,

    The 48 MHz crystal oscillator is required to use the radio and all the RF based SW examples will automatically switch to this clock source. 

    For MCU only processes, the internal 48 MHz RC oscillator may be sufficient. 

    Regards,
    Fredrik