STM32F107VC datasheet(61/108 Pages) STMICROELECTRONICS

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STM32F105xx, STM32F107xx

Electrical characteristics

107

Input/output AC characteristics

The definition and values of input/output AC characteristics are given in Figure 22 and

Table 38, respectively.

Unless otherwise specified, the parameters given in Table 38 are derived from tests

performed under the ambient temperature and VDD supply voltage conditions summarized

in Table 9.

Table 38. I/O AC characteristics(1)

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.

MODEx[1:0]

bit value(1)

Symbol

Parameter

Conditions

Min Max

Unit

fmax(IO)out Maximum frequency(2)

2. The maximum frequency is defined in Figure 22.

CL = 50 pF, VDD = 2 V to 3.6 V

MHz

tf(IO)out

Output high to low

level fall time

CL = 50 pF, VDD = 2 V to 3.6 V

125(3)

3. Guaranteed by design, not tested in production.

tr(IO)out

Output low to high

level rise time

125(3)

fmax(IO)out Maximum frequency(2) CL = 50 pF, VDD = 2 V to 3.6 V

MHz

tf(IO)out

Output high to low

level fall time

CL = 50 pF, VDD = 2 V to 3.6 V

25(3)

tr(IO)out

Output low to high

level rise time

25(3)

Fmax(IO)out Maximum frequency(2)

CL = 30 pF, VDD = 2.7 V to 3.6 V

MHz

CL = 50 pF, VDD = 2.7 V to 3.6 V

MHz

CL = 50 pF, VDD = 2 V to 2.7 V

MHz

tf(IO)out

Output high to low

level fall time

CL = 30 pF, VDD = 2.7 V to 3.6 V

5(3)

CL = 50 pF, VDD = 2.7 V to 3.6 V

8(3)

CL = 50 pF, VDD = 2 V to 2.7 V

12(3)

tr(IO)out

Output low to high

level rise time

CL = 30 pF, VDD = 2.7 V to 3.6 V

5(3)

CL = 50 pF, VDD = 2.7 V to 3.6 V

8(3)

CL = 50 pF, VDD = 2 V to 2.7 V

12(3)

-tEXTIpw

Pulse width of external

signals detected by

the EXTI controller

-10

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