Table 46. I/O Ac Characteristics; Figure 21. I/O Ac Characteristics Definition - STMicroelectronics STM32F038C6 Manual

STM32F038x6
Input/output AC characteristics
The definition and values of input/output AC characteristics are given in
Table 46, respectively. Unless otherwise specified, the parameters given are derived from
tests performed under the ambient temperature and supply voltage conditions summarized
in Table 18: General operating
OSPEEDRy
[1:0] value
x0
01
11
Fm+
configuration
(4)
1. The I/O speed is configured using the OSPEEDRx[1:0] bits. Refer to the STM32F0xxxx RM0091 reference
manual for a description of GPIO Port configuration register.
2. Guaranteed by design, not tested in production.
3. The maximum frequency is defined in
4. When Fm+ configuration is set, the I/O speed control is bypassed. Refer to the STM32F0xxxx reference
manual RM0091 for a detailed description of Fm+ I/O configuration.
conditions.

Table 46. I/O AC characteristics

Symbol
(1)
f Maximum frequency
max(IO)out
t Output fall time
f(IO)out
t Output rise time
r(IO)out
f Maximum frequency
max(IO)out
t Output fall time
f(IO)out
t Output rise time
r(IO)out
f Maximum frequency
max(IO)out
t Output fall time
f(IO)out
t Output rise time
r(IO)out
f Maximum frequency
max(IO)out
t Output fall time
f(IO)out
t Output rise time
r(IO)out
Pulse width of external
t signals detected by the
EXTIpw
EXTI controller

Figure 21. I/O AC characteristics definition

DocID026079 Rev 3
Parameter Conditions
(3)
C
L
(3)
C
L
(3)
C
L
(3)
CL = 50 pF
Figure 21.
Electrical characteristics
Figure 21
(1)(2)
Min
-
= 50 pF -
-
-
= 50 pF -
-
-
= 50 pF -
-
-
-
-
10
and
Max Unit
1 MHz
125
ns
125
4 MHz
62.5
ns
62.5
10 MHz
25
ns
25
0.5 MHz
16
ns
44
- ns
67/102
79