Power Control (Pwr); General Description; Power Supply - Nations N32G430 Series User Manual

Power control (PWR)

General description

PWR is power management unit to control status of different modules in different power modes. Its major function
is to control MCU to enter different power modes and wakeup when events or interrupts happen. MCU supports
RUN, SLEEP, STOP0, STOP2, and STANDBY mode. PWR controls LDOs, Clock sources, Resets and
Flash/SRAMs/GPIO status in different power modes.

Power supply

MCU requires 2.4V to 3.6V operating voltage supply (VDD). VDD are external power supplies.

Independent A/D converter power supply. To improve conversion accuracy, the ADC uses a separate power
supply to filter and shield interference from burrs on the printed circuit board.

The ADC power pin is VDDA.

Independent power supply to VSSA.

There are no VREF+ and VREF- pins, which are connected to the ADC power supply (VDDA) and ground
(VSSA) inside the chip.

Voltage regulator

According to the power management requirements, the power regulator has MR (The main regulator) and
BKR (The backup regulator).

The voltage regulator (MR, BKR) is always enabled after reset.

The voltage regulator operates in several different modes, depending on the application:

RUN mode: The voltage regulator provides V
power mode.

STOP0 mode: The voltage regulator provides V
of registers and SRAM.

STOP2 mode: Turn off MR and switch to BKR power supply to save register and SRAM contents.
power (core, memory and peripherals) in normal
DDD
power in low power mode to hold the contents
DDDRET
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