STM32F042F4 datasheet(72/117 Pages) STMICROELECTRONICS

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Electrical characteristics

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DocID025832 Rev 5

6.3.14

I/O port characteristics

General input/output characteristics

Unless otherwise specified, the parameters given in Table 50 are derived from tests

performed under the conditions summarized in Table 21: General operating conditions. All

I/Os are designed as CMOS- and TTL-compliant.

Table 49. I/O current injection susceptibility

Symbol

Description

Functional

susceptibility

Unit

Negative

injection

Positive

injection

IINJ

Injected current on PA12 pin

-0

Injected current on PA9, PB3, PB13, PF11 pins with induced

leakage current on adjacent pins less than 50 µA

-5

Injected current on PB0, PB1 and all other FT and FTf pins

-5

Injected current on all other TC, TTa and RST pins

-5

Table 50. I/O static characteristics

Symbol

Parameter

Conditions

Min

Typ

Max

Unit

VIL

Low level input

voltage

TC and TTa I/O

0.3 VDDIOx+0.07(1)

FT and FTf I/O

0.475 VDDIOx–0.2(1)

All I/Os

0.3 VDDIOx

VIH

High level input

voltage

TC and TTa I/O

0.445 VDDIOx+0.398(1)

FT and FTf I/O

0.5 VDDIOx+0.2(1)

All I/Os

0.7 VDDIOx

Vhys

Schmitt trigger

hysteresis

TC and TTa I/O

200(1)

FT and FTf I/O

100(1)

Ilkg

Input leakage

current(2)

TC, FT and FTf I/O

TTa in digital mode

VSS ≤ VIN ≤ VDDIOx

± 0.1

µA

TTa in digital mode

VDDIOx ≤ VIN ≤ VDDA

TTa in analog mode

VSS ≤ VIN ≤ VDDA

± 0.2

FT and FTf I/O

VDDIOx ≤ VIN ≤ 5 V

RPU

Weak pull-up

equivalent resistor

(3)

VIN = VSS

kΩ

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