Adverting event, current is big

[zcmm]

  Dear all  
          I use QFAB QFN48 schematic with internal LDO setup,but my board have not 32.768KHZ.

the Pre_processing current is big when in adverting .Why?

[Dave_couling]

I have seen something like this back when I worked with a CC2540. It was the DCDC circuit switching on, cause a fast voltage different and thus current rush. If you say you're not using the DCDC perhaps its related to RC Calibration? Though you should see peaks this high.