Power Supply Supervisor; Figure 3-1 Power Supply Block Diagram - Nations N32G430 Series User Manual


STANDBY mode: The MR regulator stops power supply and the BKR can be turned on or off as
required.

MR
It is Main Regulator for VDDD supply source. It is mainly used in MCU's RUN mode, SLEEP mode and STOP0
mode. In STOP0 mode, MR in low-power mode is optional, and in normal mode in the other two modes.

BKR
This Backup Regulator is used in STOP2 and STANDBY modes.
VDDA
VSSA
VDD
VSS

Power supply supervisor

Power on reset (POR) and power down reset (PDR)
Power on reset (POR) and power down reset (PDR) circuits are integrated inside the chip. When V
the specified limit voltage V
circuit. Refer to the electrical characteristics section of the data sheet for details on power-on and power-off resets.

Figure 3-1 Power supply block diagram

VDDA
VSSA
VDDD
MR
SW1
VDDDRET
SW2
BKR
VDDDBK
VSS
/V , the system remains in a reset state without the need for an external reset
POR PDR
ADC, COMP
Flash
AHB, APB2,
CPU
APB1, RCC
CPU Register GPIOs, EXTI
PWR,
SRAM
RCC_BKP
Nations Technologies Inc.
59 / 647
Tel：+86-755-86309900
Email：info@nationstech.com
Address: Nations Tower, #109 Baoshen Road, Hi-tech Park North.
Nanshan District, Shenzhen, 518057, P.R.China
Main
iCache
Retention
LPTIM
Backup
RTC, IWDG PC13,14,15
/V
DD DDA
is below