STM32L151VD datasheet(99/140 Pages) STMICROELECTRONICS

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STM32L151xD STM32L152xD

Electrical characteristics

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Input/output AC characteristics

The definition and values of input/output AC characteristics are given in Figure 25 and

Table 52, respectively.

Unless otherwise specified, the parameters given in Table 52 are derived from tests

performed under ambient temperature and VDD supply voltage conditions summarized in

Table 14.

Table 52.

I/O AC characteristics(1)

OSPEEDRx

[1:0] bit

value(1)

Symbol

Parameter

Conditions

Min

Max(2)

Unit

fmax(IO)out Maximum frequency

(3)

CL = 50 pF, VDD = 2.7 V to 3.6 V

400

kHz

CL = 50 pF, VDD = 1.65 V to 2.7 V

400

tf(IO)out

tr(IO)out

Output rise and fall time

CL = 50 pF, VDD = 2.7 V to 3.6 V

625

CL = 50 pF, VDD = 1.65 V to 2.7 V

625

fmax(IO)out Maximum frequency

(3)

CL = 50 pF, VDD = 2.7 V to 3.6 V

MHz

CL = 50 pF, VDD = 1.65 V to 2.7 V

tf(IO)out

tr(IO)out

Output rise and fall time

CL = 50 pF, VDD = 2.7 V to 3.6 V

125

CL = 50 pF, VDD = 1.65 V to 2.7 V

250

Fmax(IO)out Maximum frequency

(3)

CL = 50 pF, VDD = 2.7 V to 3.6 V

MHz

CL = 50 pF, VDD = 1.65 V to 2.7 V

tf(IO)out

tr(IO)out

Output rise and fall time

CL = 50 pF, VDD = 2.7 V to 3.6 V

CL = 50 pF, VDD = 1.65 V to 2.7 V

125

Fmax(IO)out Maximum frequency

(3)

CL = 30 pF, VDD = 2.7 V to 3.6 V

MHz

CL = 50 pF, VDD = 1.65 V to 2.7 V

tf(IO)out

tr(IO)out

Output rise and fall time

CL = 30 pF, VDD = 2.7 V to 3.6 V

CL = 50 pF, VDD = 1.65 V to 2.7 V

-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 STM32L151xx, STM32L152xx and STM32L162xx

reference manual for a description of GPIO Port configuration register.

Guaranteed by design. Not tested in production.

The maximum frequency is defined in Figure 25.

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