7.2 Power Domain Constraints

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

  • Refer to the Power, Ground, and Voltage Reference Pinout I/O Descriptions to understand which pins are tied together.
  • VDDIO and VDDREG share VDD. VSSIO and VSSCORE share GND. Ideally, they can be connected together outside of this device.
  • VDDREG can be used as a low-voltage input to the main regulators, such as 1.8v < VDDREG < AVDD.
  • AVDD has its own power and ground, AVSS.
  • VDDF has its own power and ground, VSSF.
  • VDDREG powers internal regulators that, in turn, power internal domains, such as VDDCORE_SW, VDDCORE_RAM, and VDDCORE_BU.

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 Electrical Characteristics chapter.