Power Control (Pwr); Power Supplies; Figure 4. Power Supply Overview - ST STM32F102 Series Reference Manual

Power control (PWR)

4 Power control (PWR)
Low-density devices are STM32F101xx, STM32F102xx and STM32F103xx
microcontrollers where the Flash memory density ranges between 16 and 32 Kbytes.
Medium-density devices are STM32F101xx, STM32F102xx and STM32F103xx
microcontrollers where the Flash memory density ranges between 64 and 128 Kbytes.
High-density devices are STM32F101xx and STM32F103xx microcontrollers where the
Flash memory density ranges between 256 and 512 Kbytes.
This section applies to the whole STM32F10xxx family, unless otherwise specified.
4.1

Power supplies

The device requires a 2.0-to-3.6 V operating voltage supply (V
is used to supply the internal 1.8 V digital power.
The real-time clock (RTC) and backup registers can be powered from the V
the main V
Figure 4.
(from 2.4 V up to V
Note: 1 V and V
DDA
48/690
supply is powered off.
DD
Power supply overview
(V )
V
SSA
REF-
) V
DDA REF+
V
(V )
DDA
DD
V
(V )
SSA
SS
V
SS
V
DD
V
BAT
must be connected to V
SSA
V domain
DDA
A/D converter
Temp. sensor
Reset block
PLL
V domain
DD
I/O Ring
Standby circuitry
(Wakeup logic,
IWDG)
Voltage Regulator
Low voltage detector
Backup domain
LSE crystal 32K osc
BKP registers
RCC BDCR register
RTC
and V , respectively.
DD SS
RM0008
). An embedded regulator
DD
voltage when
BAT
1.8 V domain
Core
Memories
digital
peripherals