STM32F328C8 datasheet(77/109 Pages) STMICROELECTRONICS

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STM32F328C8

Electrical characteristics

100

Input/output AC characteristics

The definition and values of input/output AC characteristics are given in Figure 18 and

Table 58, respectively.

Unless otherwise specified, the parameters given are derived from tests performed under

ambient temperature and VDD supply voltage conditions summarized in Table 18.

Table 48. 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 = 1.65 V to 1.95 V

-1

MHz

tf(IO)out

Output high to low level

fall time

-125(3)

tr(IO)out

Output low to high level

rise time

-125(2)

fmax(IO)out Maximum frequency(2)

-4(3)

MHz

tf(IO)out

Output high to low level

fall time

62.5(3)

tr(IO)out

Output low to high level

rise time

62.5(3)

fmax(IO)out Maximum frequency(3)

-10(3)

MHz

tf(IO)out

Output high to low level

fall time

-25(2)

tr(IO)out

Output low to high level

rise time

-25(3)

FM+

configuration(4)

fmax(IO)out Maximum frequency(2)

0.5(4)(3

)

MHz

tf(IO)out

Output high to low level

fall time

-16(4)(3)

tr(IO)out

Output low to high level

rise time

-44(4)(3)

-tEXTIpw

Pulse width of external

signals detected by the

EXTI controller

-10

1. The I/O speed is configured using the OSPEEDRx[1:0] bits. Refer to the RM0364 reference manual for a description of

GPIO Port configuration register.

2. The maximum frequency is defined in Figure 18.

3. Guaranteed by design, not tested in production.

4. The I/O speed configuration is bypassed in FM+ I/O mode. Refer to the STM32F30x and STM32F301xx reference manual

RM0364 for a description of FM+ I/O mode configuration.

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