In recommendation checklist, there was one point as below:
>>If VDD_SNVS_IN is directly supplied by a coin cell, a schottky diode is required between VDD_HIGH_IN and VDD_SNVS_IN. The cathode is connected to VDD_SNVS_IN. Alternately, VDD_HIGH_IN and VDD_SNVS_IN can be tied together if the real-time clock function is not needed during system power-down.
However above change is not implemented in any of the EVK from Freescale/NXP, eventhough they are supporting RTC feature. That means I could not see schottkey diode being used between VDD_HIGH_IN and VDD_SNVS_IN. Kindly confirm.