STM32F102R4 datasheet(49/69 Pages) STMICROELECTRONICS

49 / 69 page

STM32F102x4, STM32F102x6

Electrical characteristics

Doc ID 15057 Rev 3

49/69

Input/output AC characteristics

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

Table 35, respectively.

Unless otherwise specified, the parameters given in Table 35 are derived from tests

performed under ambient temperature and VDD supply voltage conditions summarized in

Table 8.

Table 35.

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

Max

Unit

fmax(IO)out Maximum frequency

(2)

The maximum frequency is defined in Figure 20.

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)

Guaranteed by design, not tested in production.

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

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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