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STM32F411xC STM32F411xE Electrical characteristics
123
Input/output AC characteristics
The definition and values of input/output AC characteristics are given in Figure 31 and
Table 55, respectively.
Unless otherwise specified, the parameters given in Table 55 are derived from tests
performed under the ambient temperature and V
DD
supply voltage conditions summarized
in Table 14.
Table 55. I/O AC characteristics
(1)(2)
OSPEEDRy
[1:0] bit
value
(1)
Symbol Parameter Conditions Min Typ Max Unit
00
f
max(IO)out
Maximum frequency
(3)
C
L
= 50 pF, V
DD
≥ 2.70 V - - 4
MHz
C
L
= 50 pF, V
DD
≥ 1.7 V - - 2
C
L
= 10 pF, V
DD
≥ 2.70 V - - 8
C
L
= 10 pF, V
DD
≥ 1.7 V - - 4
t
f(IO)out
/
t
r(IO)out
Output high to low level fall
time and output low to high
level rise time
C
L
= 50 pF, V
DD
= 1.7 V to
3.6 V
--100ns
01
f
max(IO)out
Maximum frequency
(3)
C
L
= 50 pF, V
DD
≥ 2.70 V - - 25
MHz
C
L
= 50 pF, V
DD
≥ 1.7 V - - 12.5
C
L
= 10 pF, V
DD
≥ 2.70 V - - 50
C
L
= 10 pF, V
DD
≥ 1.7 V - - 20
t
f(IO)out
/
t
r(IO)out
Output high to low level fall
time and output low to high
level rise time
C
L
= 50 pF, V
DD
≥2.7 V - - 10
ns
C
L
= 50 pF, V
DD
≥ 1.7 V - - 20
C
L
= 10 pF, V
DD
≥ 2.70 V - - 6
C
L
= 10 pF, V
DD
≥ 1.7 V - - 10
10
f
max(IO)out
Maximum frequency
(3)
C
L
= 40 pF, V
DD
≥ 2.70 V - - 50
(4)
MHz
C
L
= 40 pF, V
DD
≥ 1.7 V - - 25
C
L
= 10 pF, V
DD
≥ 2.70 V - - 100
(4)
C
L
= 10 pF, V
DD
≥
1.7 V - - 50
(4)
t
f(IO)out
/
t
r(IO)out
Output high to low level fall
time and output low to high
level rise time
C
L
= 40 pF, V
DD
≥ 2.70 V - - 6
ns
C
L
= 40 pF, V
DD
≥ 1.7 V - - 10
C
L
= 10 pF, V
DD
≥ 2.70 V - - 4
C
L
= 10 pF, V
DD
≥ 1.7 V - - 6
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