STM32L151X8 datasheet(82/133 Pages) STMICROELECTRONICS

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Electrical characteristics

STM32L151x6/8/B STM32L152x6/8/B

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6.3.13

I/O port characteristics

General input/output characteristics

Unless otherwise specified, the parameters given in Table 42 are derived from tests

performed under conditions summarized in Table 13. All I/Os are CMOS and TTL compliant.

Table 42. I/O static characteristics

Symbol

Parameter

Conditions

Min

Typ

Max

Unit

VIL

Input low level voltage

0.3VDD(1)

VIH

Input high level voltage

Standard I/O

0.7 VDD

FT I/O

Vhys

I/O Schmitt trigger voltage

hysteresis(2)

Standard I/O

10% VDD(3)

FT I/O

5% VDD(4)

Ilkg

Input leakage current (5)

VSS ≤VIN ≤VDD

I/Os with LCD

±50

VSS ≤VIN ≤VDD

I/Os with analog

switches

±50

VSS ≤VIN ≤VDD

I/Os with analog

switches and LCD

±50

VSS ≤VIN ≤VDD

I/Os with USB

TBD

FT I/O

VDD ≤VIN ≤5V

TBD

VSS ≤VIN ≤VDD

Standard I/Os

±50

RPU

Weak pull-up equivalent resistor(6)(1)

VIN = VSS

RPD

Weak pull-down equivalent resistor(6)

VIN = VDD

CIO

I/O pin capacitance

1. Tested in production

2. Hysteresis voltage between Schmitt trigger switching levels. Based on characterization.

3. With a minimum of 200 mV. Based on characterization results.

4. With a minimum of 100 mV. Based on characterization results.

5. The max. value may be exceeded if negative current is injected on adjacent pins.

6. Pull-up and pull-down resistors are designed with a true resistance in series with a switchable PMOS/NMOS. This

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

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