STM32L151ZDT6 Datasheet, PDF(100/140 Page) STMicroelectronics – Ultra-low-power 32-bit MCU ARM-based Cortex-M3, 384KB Flash

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STM32L151ZDT6 Datasheet, PDF (100/140 Pages) STMicroelectronics – Ultra-low-power 32-bit MCU ARM-based Cortex-M3, 384KB Flash

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Electrical characteristics

STM32L151xD STM32L152xD

6.3.14

Figure 25. I/O AC characteristics definition

External

Output

on 50pF

90%

50%

10%

tr(I O)out

10%

50%

90%

tr(I O)out

Maximum frequency is achieved if (tr + tf) ï£ 2/3)T and if the duty cycle is (45-55%)

when loaded by 50 pF

ai14131

NRST pin characteristics

The NRST pin input driver uses CMOS technology.

Unless otherwise specified, the parameters given in Table 53 are derived from tests

performed under ambient temperature and VDD supply voltage conditions summarized in

Table 14.

Table 53. 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

VSS

- 0.8

1.4

- VDD

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

0.4

Vhys(NRST)(1)

NRST Schmitt trigger voltage

hysteresis

10%VDD(2) -

- mV

RPU

Weak pull-up equivalent

resistor(3)

VIN = VSS

45 60 kÎ©

VF(NRST)(1) NRST input filtered pulse

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

- 50 ns

350

- - ns

1. Guaranteed by design, not tested in production.

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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Doc ID 022027 Rev 6

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