STM32L152R6U6TTR データシートの表示（PDF） - STMicroelectronics

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STM32L152R6U6TTR

Ultra-low-power 32-bit MCU ARM®-based Cortex®-M3, 128KB Flash, 16KB SRAM, 4KB EEPROM, LCD, USB, ADC, DAC

STMicroelectronics 

STM32L151x6/8/B STM32L152x6/8/B

Electrical characteristics

Figure 19. I/O AC characteristics definition













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NRST pin characteristics

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

resistor, RPU (see Table 45).

Unless otherwise specified, the parameters given in Table 45 are derived from tests

performed under ambient temperature and VDD supply voltage conditions summarized in

Table 13.

Table 45. NRST pin characteristics

Symbol

Parameter

Conditions

Min

Typ

Max Unit

VIL(NRST)(1) NRST input low level voltage

-

VIH(NRST)(1) NRST input high level voltage

-

-

-

0.8

1.4

-

VOL(NRST)(1)

NRST output low level

voltage

IOL = 2 mA

2.7 V < VDD < 3.6 V

-

IOL = 1.5 mA

1.65 V < VDD < 2.7 V

-

-

V

0.4

-

Vhys(NRST)(1)

NRST Schmitt trigger voltage

hysteresis

-

- 10%VDD(2)

mV

RPU

Weak pull-up equivalent

resistor(3)

VIN = VSS

30

45

60 kΩ

VF(NRST)(1) NRST input filtered pulse

-

-

-

50 ns

VNF(NRST)(1) NRST input not filtered pulse

-

350

-

ns

1. Guaranteed by design.

2. 200 mV minimum value

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

the series resistance is around 10%.

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