STM32F031G4U7TR View Datasheet(PDF) - STMicroelectronics

Part Name

Description

MFG CO.

STM32F031G4U7TR

ARM®-based 32-bit MCU with up to 32 Kbyte Flash, 9 timers, ADC and communication interfaces, 2.0 - 3.6 V

STMicroelectronics 

STM32F031x4 STM32F031x6

Electrical characteristics

Figure 22. I/O AC characteristics definition













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069

6.3.15

NRST pin characteristics

The NRST pin input driver uses the CMOS technology. It is connected to a permanent pull-

up resistor, RPU.

Unless otherwise specified, the parameters given in the table below are derived from tests

performed under the ambient temperature and supply voltage conditions summarized in

Table 18: General operating conditions.

Table 49. NRST pin characteristics

Symbol

Parameter

Conditions

Min

Typ

Max

Unit

VIL(NRST) NRST input low level voltage

VIH(NRST) NRST input high level voltage

-

-

-

-

0.445 VDD+0.398(1) -

0.3 VDD+0.07(1)

V

-

Vhys(NRST)

NRST Schmitt trigger voltage

hysteresis

-

-

200

-

mV

RPU

Weak pull-up equivalent

resistor(2)

VIN = VSS

25

40

55

kΩ

VF(NRST)

VNF(NRST)

NRST input filtered pulse

NRST input not filtered pulse

-

2.7 < VDD < 3.6

2.0 < VDD < 3.6

-

300(3)

500(3)

-

100(1)

ns

-

-

ns

-

-

1. Data based on design simulation only. Not tested in production.

2. The pull-up is designed with a true resistance in series with a switchable PMOS. This PMOS contribution to the series

resistance is minimal (~10% order).

3. Data based on design simulation only. Not tested in production.

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