BSOM B404X Base Board Voltages

Hardware
1

I am building a base PCB for the B404X. Two questions:

  1. Is VSYS on the M.2. pinout the same as the 3.7V Bus?
  2. Is the node in the red box below VSYS and 3.7V?
    PMIC2
    PMIC21262×574 70.7 KB

Thank you.

2

Yes. Unfortunately depending on what you're looking at, the cellular modem power could be 3V7, VSYS, or VCC.