Power Supplies - ST STM32F413 Reference Manual

Power controller (PWR)
5 Power controller (PWR)
5.1

Power supplies

There are two main power supply schemes:
•
VDD = 1.7 to 3.6 V: external power supply for I/Os with the internal regulator disabled,
provided externally through VDD pins. Requires the use of an external power supply
supervisor connected to the VDD and PDR_ON pins.
•
VDD = 1.8 to 3.6 V: external power supply for I/Os and the internal regulator (when
enabled), provided externally through VDD pins.
• V
DD_USB
V
DD_USB
Note: V value does not dependent on V
DD_USB
supply to be delivered to the device and the first to be switched off. When the three power
supplies are shut down, if V
fall below the functional range, the device is not be damaged.
The device is still functional when V
The real-time clock (RTC), and the RTC backup registers can be powered from the V
voltage when the main V
Note: Depending on the operating power supply range, some peripheral may be used with limited
functionality and performance. For more details refer to section "General operating
conditions" in the datasheet.
92/1284
= 3.0 to 3.6 V
is a dedicated independent USB power supply for full speed transceivers.
remains active for a short period of time and V
DD_USB
supply is powered off.
DD
DocID029473 Rev 3
and V . However, V
DD DDA
is switched off.
DD_USB
RM0430
must be the last
DD_USB
/V
DDA
BAT
DDIO