CD00161566 Datasheet, PDF (36/105 Pages) STMicroelectronics – nullMedium-density performance line ARM-based 32-bit MCU

Electrical characteristics
Figure 12. Pin loading conditions
STM32F103x8, STM32F103xB
Figure 13. Pin input voltage
C = 50 pF
STM32F103xx pin
ai14141
STM32F103xx pin
VIN
ai14142
5.1.6
Power supply scheme
Figure 14. Power supply scheme
1.8-3.6V
VBAT
Po wer swi tch
Backup circuitry
(OSC32K,RTC,
Wake-up logic
Backup registers)
GP I/Os
VDD
VDD
1/2/3/4/5
5 × 100 nF
+ 1 × 4.7 µF
V_SS
1/2/3/4/5
VDD
10 nF
+ 1 µF
VREF
10 nF
+ 1 µF
VDDA
VREF+
VREF-
V_SSA
O UT
IO
Logic
IN
Regulator
Kernel logic
(CPU,
Digital
& Memories)
ADC
Analog:
RCs, PLL,
...
ai14125d
Caution: In Figure 14, the 4.7 µF capacitor must be connected to V_DD3.
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DocID13587 Rev 16