STMicroelectronics STM32F042C4, Manual

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STM32F042xx Electrical characteristics
94
Input/output AC characteristics
The definition and values of input/output AC characteristics are given in Figure 24 and
Table 52 , respectively.
Unless otherwise specified, the parameters given are derived from tests performed under
the ambient temperature and supply voltage conditions summarized in
Table 21: General
operating conditions .
Table 52. I/O AC characteristics
(1)(2)
OSPEEDRy
[1:0] value
(1)
Symbol Parameter Conditions Min Max Unit
x0
f
max(IO)out
Maximum frequency
(3)
C
L
= 50 pF, V
DDIOx

2 V
- 2 MHz
t
f(IO)out
Output fall time - 125
ns
t
r(IO)out
Output rise time - 125
f
max(IO)out
Maximum frequency
(3)
C
L
= 50 pF, V
DDIOx

2 V
- 1 MHz
t
f(IO)out
Output fall time - 125
ns
t
r(IO)out
Output rise time - 125
01
f
max(IO)out
Maximum frequency
(3)
C
L
= 50 pF, V
DDIOx

2 V
- 10 MHz
t
f(IO)out
Output fall time - 25
ns
t
r(IO)out
Output rise time - 25
f
max(IO)out
Maximum frequency
(3)
C
L
= 50 pF, V
DDIOx

2 V
- 4 MHz
t
f(IO)out
Output fall time - 62.5
ns
t
r(IO)out
Output rise time - 62.5
11
f
max(IO)out
Maximum frequency
(3)
C
L
= 30 pF, V
DDIOx

2.7 V - 50
MHz
C
L
= 50 pF, V
DDIOx

2.7 V - 30
C
L
= 50 pF, 2 V

V
DDIOx

2.7 V - 20
C
L
= 50 pF, V
DDIOx

2 V - 10
t
f(IO)out
Output fall time
C
L
= 30 pF, V
DDIOx

2.7 V - 5
ns
C
L
= 50 pF, V
DDIOx

2.7 V - 8
C
L
= 50 pF, 2 V

V
DDIOx

2.7 V - 12
C
L
= 50 pF, V
DDIOx

2 V - 25
t
r(IO)out
Output rise time
C
L
= 30 pF, V
DDIOx

2.7 V - 5
C
L
= 50 pF, V
DDIOx

2.7 V - 8
C
L
= 50 pF, 2 V

V
DDIOx

2.7 V - 12
C
L
= 50 pF, V
DDIOx

2 V - 25