STM32F302xx/STM32F303xx
Electrical characteristics
Input/output AC characteristics
The definition and values of input/output AC characteristics are given in Figure 23 and
Table 54, respectively.
Unless otherwise specified, the parameters given are derived from tests performed under
ambient temperature and V supply voltage conditions summarized in Table 22.
DD
(1)
Table 54. I/O AC characteristics
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
-
-
2(3) MHz
Output high to low level fall
tf(IO)out
time
125(3)
ns
125(3)
x0
01
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
rise time
tr(IO)out
-
-
-
fmax(IO)out Maximum frequency(2)
10(3) MHz
Output high to low level fall
tf(IO)out
time
25(3)
ns
Output low to high level
rise time
tr(IO)out
-
25(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(3) MHz
30(3) MHz
20(3) MHz
5(3)
fmax(IO)out Maximum frequency(2)
Output high to low level fall
11
tf(IO)out
time
8(3)
12(3)
ns
5(3)
Output low to high level
rise time
tr(IO)out
8(3)
12(3)
fmax(IO)out Maximum frequency(2)
2(4) MHz
Output high to low level fall
FM+
tf(IO)out
time
-
-
12(4)
CL = 50 pF, VDD = 2 V to 3.6 V
configuration(4)
ns
Output low to high level
rise time
tr(IO)out
34(4)
Pulse width of external
signals detected by the
EXTI controller
-
tEXTIpw
10(3)
-
ns
1. The I/O speed is configured using the OSPEEDRx[1:0] bits. Refer to the RM0316 reference manual for a description of
GPIO Port configuration register.
2. The maximum frequency is defined in Figure 23.
3. Guaranteed by design, not tested in production.
4. The I/O speed configuration is bypassed in FM+ I/O mode. Refer to the STM32F30xB/C reference manual RM0316 for a
description of FM+ I/O mode configuration.
Doc ID 023353 Rev 5
91/133
STMICROELECTRONICS [ ST ]
