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.