STM32F378CC datasheet(86/131 Pages) STMICROELECTRONICS

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Electrical characteristics

STM32F378xx

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DocID025608 Rev 4

Input/output AC characteristics

The definition and values of input/output AC characteristics are given in Figure 20 and

Table 52, respectively.

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

ambient temperature and VDD supply voltage conditions summarized in Table 22.

Table 52. 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

MHz

tf(IO)out

Output high to low level

fall time

CL = 50 pF, VDD = 1.65 V to 1.95 V

-125(3)

tr(IO)out

Output low to high level

rise time

-125(3)

fmax(IO)out Maximum frequency(2)

CL = 50 pF, VDD = 1.65 V to 1.95 V

MHz

tf(IO)out

Output high to low level

fall time

CL = 50 pF, VDD = 1.65 V to 1.95 V

-62.5

tr(IO)out

Output low to high level

rise time

-62.5

fmax(IO)out Maximum frequency(2)(3) CL = 50 pF, VDD = 1.65 V to 1.95 V

MHz

tf(IO)out

Output high to low level

fall time

CL = 50 pF, VDD = 1.65 V to 1.95 V

tr(IO)out

Output low to high level

rise time

CL = 50 pF, VDD = 1.65 V to 1.95 V

FM+

configuration

(4)

fmax(IO)out Maximum frequency(2)

CL = 50 pF, VDD = 1.65 V to 1.95 V

-0.5

MHz

tf(IO)out

Output high to low level

fall time

-16

tr(IO)out

Output low to high level

rise time

-44

-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 RM0313 reference manual for a description of

GPIO Port configuration register.

2. The maximum frequency is defined in Figure 20.

3. Guaranteed by design.

4. The I/O speed configuration is bypassed in FM+ I/O mode. Refer to the STM32F37xx reference manual RM0313 for a

description of FM+ I/O mode configuration

STM32F378CC Datasheet(PDF) 86 Page - STMicroelectronics

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