STM32F217IG datasheet(104/175 Pages) STMICROELECTRONICS

104 / 175 page

Electrical characteristics

STM32F21xxx

104/175

DocID17050 Rev 9

Input/output AC characteristics

The definition and values of input/output AC characteristics are given in Figure 36 and

Table 47, respectively.

Unless otherwise specified, the parameters given in Table 47 are derived from tests

performed under the ambient temperature and VDD supply voltage conditions summarized

in Table 13.

Table 47. I/O AC characteristics(1)

OSPEEDRy

[1:0] bit

value(1)

Symbol

Parameter

Conditions

Min

Typ

Max

Unit

fmax(IO)out Maximum frequency(2)

CL = 50 pF, VDD > 2.70 V

MHz

CL = 50 pF, VDD > 1.8 V

CL = 10 pF, VDD > 2.70 V

CL = 10 pF, VDD > 1.8 V

tf(IO)out/

tr(IO)out

Output high to low level fall

time and output low to high

level rise time

CL = 50 pF, VDD = 1.8 V to

3.6 V

100

fmax(IO)out Maximum frequency(2)

CL = 50 pF, VDD > 2.70 V

MHz

CL = 50 pF, VDD > 1.8 V

12.5

CL = 10 pF, VDD > 2.70 V

50(3)

CL = 10 pF, VDD > 1.8 V

tf(IO)out/

tr(IO)out

Output high to low level fall

time and output low to high

level rise time

CL = 50 pF, VDD >2.7 V

CL = 50 pF, VDD > 1.8 V

CL = 10 pF, VDD > 2.70 V

CL = 10 pF, VDD > 1.8 V

fmax(IO)out Maximum frequency(2)

CL = 40 pF, VDD > 2.70 V

MHz

CL = 40 pF, VDD > 1.8 V

CL = 10 pF, VDD > 2.70 V

100(3)

CL = 10 pF, VDD > 1.8 V

50(3)

tf(IO)out/

tr(IO)out

Output high to low level fall

time and output low to high

level rise time

CL = 40 pF, VDD > 2.70 V

CL = 40 pF, VDD > 1.8 V

CL = 10 pF, VDD > 2.70 V

CL = 10 pF, VDD > 1.8 V

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