STM32F103xC, STM32F103xD, STM32F103xE
Input/output AC characteristics
Electrical characteristics
The definition and values of input/output AC characteristics are given in Figure 42 and
Table 47, respectively.
Unless otherwise specified, the parameters given in Table 47 are derived from tests
performed under ambient temperature and V supply voltage conditions summarized in
DD
Table 10.
(1)
Table 47. I/O AC characteristics
MODEx[1:0]
Symbol
Parameter
Conditions
Min Max Unit
bit value(1)
fmax(IO)out Maximum frequency(2) CL = 50 pF, VDD = 2 V to 3.6 V
2
MHz
ns
Output high to low
tf(IO)out
125(3)
10
level fall time
CL = 50 pF, VDD = 2 V to 3.6 V
Output low to high
tr(IO)out
125(3)
10
level rise time
fmax(IO)out Maximum frequency(2) CL = 50 pF, VDD = 2 V to 3.6 V
MHz
ns
Output high to low
tf(IO)out
25(3)
01
level fall time
CL = 50 pF, VDD = 2 V to 3.6 V
Output low to high
tr(IO)out
25(3)
level rise time
CL = 30 pF, VDD = 2.7 V to 3.6 V
Fmax(IO)out Maximum frequency(2) CL = 50 pF, VDD = 2.7 V to 3.6 V
CL = 50 pF, VDD = 2 V to 2.7 V
50
30
MHz
MHz
MHz
20
CL = 30 pF, VDD = 2.7 V to 3.6 V
Output high to low
level fall time
5(3)
8(3)
12(3)
5(3)
8(3)
12(3)
11
tf(IO)out
tr(IO)out
tEXTIpw
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
ns
Output low to high
level rise time
Pulse width of
external signals
detected by the EXTI
controller
-
10
ns
1. The I/O speed is configured using the MODEx[1:0] bits. Refer to the STM32F10xxx reference manual for a
description of GPIO Port configuration register.
2. The maximum frequency is defined in Figure 42.
3. Guaranteed by design, not tested in production.
Doc ID 14611 Rev 7
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