STM32F303CB datasheet(91/133 Pages) STMICROELECTRONICS

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STM32F302xx/STM32F303xx

Electrical characteristics

Doc ID 023353 Rev 5

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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 VDD supply voltage conditions summarized in Table 22.

Table 54.

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 = 2 V to 3.6 V

2(3)

MHz

tf(IO)out

Output high to low level fall

time

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

10(3)

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

50(3)

MHz

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

30(3)

MHz

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

20(3)

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)

FM+

configuration(4)

fmax(IO)out Maximum frequency

(2)

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

-2(4)

MHz

tf(IO)out

Output high to low level fall

time

-12(4)

tr(IO)out

Output low to high level

rise time

-34(4)

-tEXTIpw

Pulse width of external

signals detected by the

EXTI controller

10(3)

-ns

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.

The maximum frequency is defined in Figure 23.

Guaranteed by design, not tested in production.

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.

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