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CC2543 / 2544 Radio Frequency Synthesizer Calibration

Evan Gouzie
Prodigy 20 points
Other Parts Discussed in Thread: CC2543

I am trying to find out any sort of timing information on the frequency synthesizer calibration / lock time for the CC2543 / 44.  The current docs make no mention that I can see about this, the closest thing I can find is a turn-around time, which I'm not sure if it includes the calibration timing. 

Thanks!

  • 0
    TI__Guru 56590 points

    Hello Evan, 

    The calibration timing is included in the turnaround time. The calibration time for the synthesizer is constant. It is possible to switch faster between Rx and Tx on the same frequency if you let the synth run by setting the following bit:

    PRF.CHAN.SYNTH_ON                       = 1;               // Don’t turn of SYNTH at TASKDONE. (i.e. re-calibration is not performed when a RX or TX task is restarted)

    But this can cause problems if you don't re-calibrate when changing frequencies or during considerable temperature changes as this might affect the synth and require a new calibration to acquire stable performance.

    BR. Eirik