The power management unit (PMU) generates the internally regulated core supplies for the device and provides supervision of the external supply (VDD). The PMU also contains the bandgap voltage reference used by the PMU itself as well as analog peripherals. Key features of the PMU include:

• Power-on reset (POR) supply monitor
• Brown-out reset (BOR) supply monitor with early warning capability using three programmable thresholds
• Core regulator with support for RUN, SLEEP, STOP, and STANDBY operating modes to dynamically balance performance with power consumption
• Parity-protected trim to immediately generate a power-on reset (POR) in the event that a power management trim is corrupted

For more details, see the PMU chapter of the MSPM0 C-Series 24MHz Microcontrollers Technical Reference Manual.