Figure 5. Nrst Circuitry Example; Stm32F412Xx, Stm32F413Xx, Stm32F423Xx, Stm32F446Xx, Stm32F469Xx; And Stm32F479Xx) - ST STM32F4 Series Application Note

Reset and power supply supervisor
internal circuitry (no additional component needed, thanks to fully embedded reset
controller).
•
When the internal reset is OFF, the following integrated features are no longer
supported:
–
–
–
–
Figure 5. NRST circuitry example (only for STM32F410xx, STM32F411xx,

STM32F412xx, STM32F413xx, STM32F423xx, STM32F446xx, STM32F469xx

Even with PDR_ON=0, during power up, the NRST is driven low by internal Reset controller
during T
RSTTEMPO
STM32F4xxxx datasheets for actual timing value.
14/50
The integrated power-on reset (POR) / power-down reset (PDR) circuitry is
disabled.
The brownout reset (BOR) circuitry must be disabled.
The embedded programmable voltage detector (PVD) is disabled.
VBAT functionality is no more available and V
in order to allow stabilization of internal analog circuitry. Refer to

and STM32F479xx)

AN4488 Rev 7
pin should be connected to V
BAT
AN4488
.
DD