Electrical characteristics
STM32F103xx
Input/output AC characteristics
The definition and values of input/output AC characteristics are given in Figure 16 and
Table 31, respectively.
Unless otherwise specified, the parameters given in Table 31 are derived from tests
performed under ambient temperature and V supply voltage conditions summarized in
DD
Table 7.
(1)
Table 31. I/O AC characteristics
I/O
Symbol
Parameter
Conditions
Min Max Unit
mode(1)
fmax(IO)out Maximum frequency(2)
CL = 50 pF, VDD = 2 V to 3.6 V
2
MHz
ns
Output high to low level fall
tf(IO)out
125
10
time(3)
CL = 50 pF, VDD = 2 V to 3.6 V
CL = 50 pF, VDD = 2 V to 3.6 V
CL = 50 pF, VDD = 2 V to 3.6 V
Output low to high level
tr(IO)out
125
rise time(3)
fmax(IO)out Maximum frequency(2)
10 MHz
Output high to low level fall
tf(IO)out
25
ns
25
01
time(3)
Output low to high level
tr(IO)out
rise time(3)
CL = 30 pF, VDD = 2.7 V to 3.6 V
CL = 50 pF, VDD = 2.7 V to 3.6 V
CL = 50 pF, VDD = 2 V to 2.7 V
CL = 30 pF, VDD = 2.7 V to 3.6 V
CL = 50 pF, VDD = 2.7 V to 3.6 V
CL = 50 pF, VDD = 2 V to 2.7 V
CL = 30 pF, VDD = 2.7 V to 3.6 V
CL = 50 pF, VDD = 2.7 V to 3.6 V
CL = 50 pF, VDD = 2 V to 2.7 V
50 MHz
Fmax(IO)out Maximum frequency(2)
30 MHz
20 MHz
5
8
Output high to low level fall
11
tf(IO)out
time(3)
12
ns
5
Output low to high level
tr(IO)out
8
rise time(3)
12
Pulse width of external
tEXTIpw signals detected by the
EXTI controller
-
10
ns
1. Refer to the Reference user manual UM0306 for a description of GPIO Port configuration register.
2. The maximum frequency is defined in Figure 16.
3. Values based on design simulation and validated on silicon, not tested in production.
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