
Electrical characteristics
STM32F051x
Table 32. Switching output I/O current consumption
Symbol
Parameter
Conditions(1)
I/O toggling
frequency (fSW)
Typ
Unit
4 MHz
0.07
VDD = 3.3 V
C =CINT
VDD = 3.3 Volts
CEXT = 0 pF
C = CINT + CEXT+ CS
VDD = 3.3 Volts
CEXT = 10 pF
C = CINT + CEXT+ CS
ISW
I/O current
consumption
VDD = 3.3 Volts
CEXT = 22 pF
C = CINT + CEXT+ CS
1. CS = 7 pF (estimated value).
VDD = 3.3 Volts
CEXT = 33 pF
C = CINT + CEXT+ CS
VDD = 3.3 Volts
CEXT = 47 pF
C = CINT + CEXT+ CS
C = Cint
VDD = 2.4 Volts
CEXT = 47 pF
C = CINT + CEXT+ CS
C = Cint
8 MHz
16 MHz
24 MHz
48 MHz
4 MHz
8 MHz
16 MHz
24 MHz
48 MHz
4 MHz
8 MHz
16 MHz
24 MHz
48 MHz
4 MHz
8 MHz
16 MHz
24 MHz
4 MHz
8 MHz
16 MHz
24 MHz
4 MHz
8 MHz
16 MHz
4 MHz
8 MHz
16 MHz
24 MHz
0.15
0.31
0.53
0.92
0.18
0.37
0.76
1.39
2.188
0.32
0.64
1.25
2.23
4.442
mA
0.49
0.94
2.38
3.99
0.64
1.25
3.24
5.02
0.81
1.7
3.67
0.66
1.43
2.45
4.97
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