STM32F217ZG datasheet(97/173 Pages) STMICROELECTRONICS

97 / 173 page

STM32F21xxx

Electrical characteristics

Doc ID 17050 Rev 8

97/173

Input/output AC characteristics

The definition and values of input/output AC characteristics are given in Figure 35 and

Table 45, respectively.

Unless otherwise specified, the parameters given in Table 45 are derived from tests

performed under the ambient temperature and VDD supply voltage conditions summarized

in Table 11.

Based on characterization data, not tested in production.

Table 45.

I/O AC characteristics(1)(2)

OSPEEDRy

[1:0] bit

value(1)

Symbol

Parameter

Conditions

Min

Typ

Max

Unit

fmax(IO)out Maximum frequency

(3)

CL = 50 pF, VDD > 2.70 V

MHz

CL = 50 pF, VDD > 1.8 V

CL = 10 pF, VDD > 2.70 V

TBD

CL = 10 pF, VDD > 1.8 V

TBD

tf(IO)out

Output high to low level fall

time

CL = 50 pF, VDD = 1.8 V to

3.6 V

TBD

tr(IO)out

Output low to high level rise

time

TBD

fmax(IO)out Maximum frequency

(3)

CL = 50 pF, VDD > 2.70 V

MHz

CL = 50 pF, VDD > 1.8 V

12.5(4)

CL = 10 pF, VDD > 2.70 V

50(4)

CL = 10 pF, VDD > 1.8 V

TBD

tf(IO)out

Output high to low level fall

time

CL = 50 pF, VDD < 2.7 V

TBD

CL = 10 pF, VDD > 2.7 V

TBD

tr(IO)out

Output low to high level rise

time

CL = 50 pF, VDD < 2.7 V

TBD

CL = 10 pF, VDD > 2.7 V

TBD

fmax(IO)out Maximum frequency

(3)

CL = 40 pF, VDD > 2.70 V

50(4)

MHz

CL = 40 pF, VDD > 1.8 V

CL = 10 pF, VDD > 2.70 V

100(4)

CL = 10 pF, VDD > 1.8 V

TBD

tf(IO)out

Output high to low level fall

time

CL = 50 pF, 2.4 < VDD < 2.7 V

TBD

CL = 10 pF, VDD > 2.7 V

TBD

tr(IO)out

Output low to high level rise

time

CL = 50 pF, 2.4 < VDD < 2.7 V

TBD

CL = 10 pF, VDD > 2.7 V

TBD

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