To save power VSYS and VSYS2 can be from different voltage rails however it is unclear in the documentation as to which rail (VSYS or VSYS2) the PMIC pin VIN is tied too in the SOM and similarly for the VIN2 pin that supplies the Boost SWBST, VCC_SD and V33?
VSYS is connected to VLDO1IN
VSYS2 is connected to VLDO2IN
Hi LeonidM, Thank you
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