STM32F303XD datasheet(122/173 Pages) STMICROELECTRONICS

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Electrical characteristics

STM32F303xD STM32F303xE

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DocID026415 Rev 5

Input/output AC characteristics

The definition and values of input/output AC characteristics are given in Figure 40 and

Table 68, respectively.

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

ambient temperature and VDD supply voltage conditions summarized in Table 19.

Table 68. 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)

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

20(3)

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 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

1. 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.

2. The maximum frequency is defined in Figure 40.

3. Guaranteed by design, not tested in production.

4. The I/O speed configuration is bypassed in FM+ I/O mode. Refer to the reference manual RM0316 for a description of FM+

I/O mode configuration.

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