Electrical characteristics
STM32F050xx
Input/output AC characteristics
The definition and values of input/output AC characteristics are given in Figure 22 and
Table 47, respectively.
Unless otherwise specified, the parameters given are derived from tests performed under
ambient temperature and VDD supply voltage conditions summarized in Table 15: General
operating conditions.
Table 47. I/O AC characteristics(1)
OSPEEDRy
[1:0] value(1)
Symbol
Parameter
Conditions
Min Max Unit
fmax(IO)out Maximum frequency(2) CL = 50 pF, VDD = 2 V to 3.6 V
x0
tf(IO)out
Output high to low level
fall time
tr(IO)out
Output low to high level
rise time
CL = 50 pF, VDD = 2 V to 3.6 V
fmax(IO)out Maximum frequency(2) CL = 50 pF, VDD = 2 V to 3.6 V
01
tf(IO)out
Output high to low level
fall time
tr(IO)out
Output low to high level
rise time
CL = 50 pF, VDD = 2 V to 3.6 V
-
2 MHz
- 125(3)
ns
- 125(3)
- 10 MHz
- 25(3)
ns
- 25(3)
11
FM+
configuration
(4)
fmax(IO)out Maximum frequency(2)
tf(IO)out
Output high to low level
fall time
tr(IO)out
Output low to high level
rise time
fmax(IO)out Maximum frequency(2)
tf(IO)out
Output high to low level
fall time
tr(IO)out
Output low to high level
rise time
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
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
- 50
- 30 MHz
- 20
-
5(3)
-
8(3)
- 12(3)
ns
-
5(3)
-
8(3)
- 12(3)
-
2(3) MHz
- 12(3)
ns
- 34(3)
tEXTIpw
Pulse width of external
signals detected by the
EXTI controller
10 -
ns
1. The I/O speed is configured using the OSPEEDRx[1:0] bits. Refer to the RM0091 reference manual for a description of
GPIO Port configuration register.
2. The maximum frequency is defined in Figure 22.
3. Guaranteed by design, not tested in production.
4. When FM+ configuration is set, the I/O speed control is bypassed. Refer to the STM32F05xxx reference manual RM0091
for a detailed description of FM+ I/O configuration.
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Doc ID 023683 Rev 1