STM32L151C6U6ADTR datasheet(87/130 Pages) STMICROELECTRONICS

Part #	STM32L151C6U6ADTR

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

PDF	130 Pages

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Manufacturer	STMICROELECTRONICS [STMicroelectronics]

Direct Link	http://www.st.com

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STM32L151x6/8/B-A STM32L152x6/8/B-A

Electrical characteristics

105

Figure 19. I/O AC characteristics definition

6.3.14

NRST pin characteristics

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

resistor, RPU (see Table 46).

Unless otherwise specified, the parameters given in Table 46 are derived from tests

performed under ambient temperature and VDD supply voltage conditions summarized in

Table 14.

Table 46. NRST pin characteristics

Symbol

Parameter

Conditions

Min

Typ

Max

Unit

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

0.3 VDD

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

0.39 VDD+0.59

VOL(NRST)(1) NRST output low level voltage

IOL = 2 mA

2.7 V < VDD < 3.6 V

0.4

IOL = 1.5 mA

1.65 V < VDD < 2.7 V

Vhys(NRST)(1)

NRST Schmitt trigger voltage

hysteresis

10%VDD(2)

RPU

Weak pull-up equivalent

resistor(3)

VIN = VSS

VF(NRST)(1) NRST input filtered pulse

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

350

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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