STM32F103XC datasheet(86/118 Pages) STMICROELECTRONICS

86 / 118 page

Electrical characteristics

STM32F103xC, STM32F103xD, STM32F103xE

86/118

Input/output AC characteristics

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

Table 46, respectively.

Unless otherwise specified, the parameters given in Table 46 are derived from tests

performed under ambient temperature and VDD supply voltage conditions summarized in

Table 9.

Table 46.

I/O AC characteristics(1)

The I/O speed is configured using the MODEx[1:0] bits. Refer to the STM32F10xxx reference manual for a

description of GPIO Port configuration register.

MODEx[1:0]

bit value(1)

Symbol

Parameter

Conditions

Min

Max

Unit

fmax(IO)out Maximum frequency

(2)

The maximum frequency is defined in Figure 40.

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)

Values based on design simulation and validated on silicon, not tested in production.

tr(IO)out

Output low to high

level rise time

125(3)

fmax(IO)out Maximum frequency

(2) C

L = 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

MHz

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

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)

-tEXTIpw

Pulse width of

external signals

detected by the EXTI

controller

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