Datasheet

Electrical characteristics STM32F334x4 STM32F334x6 STM32F334x8
46/121 DocID025409 Rev 8
6.1.6 Power-supply scheme
Figure 11. Power-supply scheme
Caution: Each power-supply pair (V
DD
/V
SS
, V
DDA
/V
SSA
etc..) must be decoupled with filtering
ceramic capacitors as shown above. These capacitors must be placed as close as possible
to or below the appropriate pins on the underside of the PCB, to ensure the good
functionality of the device.
MS31954V1
Kernel logic
(CPU,
Digital
& Memories)
Backup circuitry
(LSE, RTC,
Backup registers)
Wake-up logic
ADC/
DAC
Level shifter
I/O
Logic
V
DD
1.65 - 3.6V
V
BAT
Power
switch
4 x V
DD
4 x V
SS
V
DDA
V
REF+
V
REF-
V
SSA
V
DDA
GPIOs
OUT
IN
4 x 100nF
+ 1 x 4.7 μF
10 nF
+ 1 μF
Anolog: RCs, PLL,
comparators, OPAMP, ...
Regulator
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