Power Control (Pwr); Power Supplies; Figure 3. Power Supply Overview - ST STM32F207 Series Reference Manual

Power control (PWR)

4 Power control (PWR)
4.1

Power supplies

The device requires a 1.8-to-3.6 V operating voltage supply (V
voltage regulator is used to supply the internal 1.2 V digital power.
The real-time clock (RTC), the RTC backup registers, and the backup SRAM (BKP SRAM)
can be powered from the 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 STM32F2xx datasheets.
1.8-3.6 V
2 × 2.2 μF
V
DD
15 × 100 nF
+ 1 × 4.7 μF
V DD
100 nF
100 nF
+ 1 μF
+ 1 μF
1. V and V
DDA
2. IRROFF is only available on WLCSP package.
64/1381
BAT

Figure 3. Power supply overview

V BAT
GP I/Os
V
CAP_1
V
CAP_2
V
DD
1/2/...14/15
V SS
1/2/...14/15
REGOFF
IRROFF
V DDA
V REF
V REF+
V REF-
V SSA
must be connected to V
SSA
voltage when the main V
Power switch
OUT
IN
Voltage
regulator
ADC
and V , respectively.
DD SS
RM0033 Rev 9
). An embedded linear
DD
supply is powered off.
DD
Backup circuitry
(OSC32K,RTC,
Wakeup logic
Backup registers,
backup RAM)
IO
Logic
Kernel logic
(CPU,
digital
& RAM)
Flash memory
Analog
RCs, PLL,
...
RM0033
ai17527e