STM32F050C4 datasheet(70/97 Pages) STMICROELECTRONICS

70 / 97 page

Electrical characteristics

STM32F050xx

70/97

Doc ID 023683 Rev 1

Input/output AC characteristics

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

Table 47, respectively.

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

ambient temperature and VDD supply voltage conditions summarized in Table 15: General

operating conditions.

Table 47.

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

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

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

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

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(3)

MHz

tf(IO)out

Output high to low level

fall time

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

12(3)

tr(IO)out

Output low to high level

rise time

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

34(3)

tEXTIpw

Pulse width of external

signals detected by the

EXTI controller

The I/O speed is configured using the OSPEEDRx[1:0] bits. Refer to the RM0091 reference manual for a description of

GPIO Port configuration register.

The maximum frequency is defined in Figure 22.

Guaranteed by design, not tested in production.

When FM+ configuration is set, the I/O speed control is bypassed. Refer to the STM32F05xxx reference manual RM0091

for a detailed description of FM+ I/O configuration.

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