DW1000 dynamically trim the crystal

Wireless Connectivity Ultra-Wideband
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1

hi:
when i read dwm1000-datasheet，Internally trimmed to +/- 2 ppm in Chapter of 4.5.1。
“By using the temperature monitoring capability of the DW1000 chip on the DWM1000 module it is possible to dynamically trim the crystal during run time to maintain the +/- 2ppm specification over the full temperature range of operation ”
1、it means when we do not use TCXOs,it can dynamically trim the crystal during run time to maintain the +/- 2ppm?
2、how to enable temperature monitoring capability to dynamically trim the crystal during run time to maintain the +/- 2ppm?

but in dw1000 datasheet ,the chapter of 8.1 , it suggests us to use TCXOs。                     TDOA

                                                                                           Best regards
2

If you know the system temperature and you know the crystals temperature coefficient then you can adjust the crystal tuning value based on the temperature.
You have to implement this in your own firmware, the chip doesn’t do it for you.

A TCXO is simpler since you don’t need to do that to maintain temperature stability.