7.2 Power Domain Constraints

The PIC32CK SG/GC power domains are not independent of each other:

  • VDDIO and VDDREG share GND, whereas AVDD has its own ground, AVSS.
  • AVDD and VDDIO must share the main supply, VDD.
  • VDD_BU, VDDREG, AVDD, VDDIO, VDDUSB, VDDCORE_USB, VDDCORE_SW, VDDCORE_RAM and VDDCORE_BU are internal power domains.

The maximum supply falling and rising rates of the different power supplies must not exceed the values described in the “Power Supply Characteristics” section of the 51 Electrical Characteristics chapter.