STM32F101X6 datasheet(42/64 Pages) STMICROELECTRONICS

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Electrical characteristics

STM32F101xx

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5.3.12

I/O port characteristics

General input/output characteristics

Unless otherwise specified, the parameters given in Table 29 are derived from tests

performed under ambient temperature and VDD supply voltage conditions summarized in

Table 7.

All unused pins must be held at a fixed voltage, by using the I/O output mode, an external

pull-up or pull-down resistor (see Figure 14).

Table 29.

I/O static characteristics(1)

VDD = 3.3 V, TA = −40 to 85 °C unless otherwise specified.

Symbol

Parameter

Conditions

Min

Typ

Max

Unit

VIL

Input low level voltage(2)

Values based on characterization results, and not tested in production.

TTL ports

–0.5

0.8

VIH

IO TC input high level

voltage(2)

2VDD+0.5

IO FT high level voltage(2)

25.5V

VIL

Input low level voltage(2)

CMOS ports

–0.5

0.35 VDD

VIH

Input high level voltage(2)

0.65 VDD

VDD+0.5

Vhys

IO TC Schmitt trigger voltage

hysteresis(3)

Hysteresis voltage between Schmitt trigger switching levels. Based on characterization results, not tested.

200

IO TC Schmitt trigger voltage

hysteresis(3)

5% VDD

(4)

Ilkg

Input leakage current (4)

With a minimum of 100 mV.

VSS ≤VIN ≤VDD

Standard I/Os

±1

µA

VIN = 5 V

5 V tolerant I/Os

RPU

Weak pull-up equivalent

resistor(5)

Leakage could be higher than max. if negative current is injected on adjacent pins.

VIN = VSS

Ω

RPD

Weak pull-down equivalent

resistor(6)

Pull-up and pull-down resistors are designed with a true resistance in series with a switchable

PMOS/NMOS. This PMOS/NMOS contribution to the series resistance is minimum (~10% order)

VIN = VDD

Ω

CIO

I/O pin capacitance

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