STM32WB55VC 查看數據表（PDF） - STMicroelectronics

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STM32WB55VC

Multiprotocol wireless 32-bit MCU Arm®-based Cortex®-M4 with FPU, Bluetooth® 5 and 802.15.4 radio solution

STMicroelectronics 

Electrical characteristics

STM32WB55xx STM32WB35xx

Table 75. NRST pin characteristics(1)

Symbol

Parameter

Conditions

Min

Typ

Max

Unit

VIL(NRST)

NRST input

low level voltage

VIH(NRST)

NRST input

high level voltage

-

-

-

0.3 x VDD

V

-

0.7 x VDD

-

-

Vhys(NRST)

NRST Schmitt trigger

voltage hysteresis

-

-

200

-

mV

RPU

Weak pull-up

equivalent resistor(2)

VIN = VSS

25

40

55

kΩ

VF(NRST)

NRST input

filtered pulse

-

-

-

VNF(NRST)

NRST input

not filtered pulse

1.71 V ≤ VDD ≤ 3.6 V

350

-

70

ns

-

1. Guaranteed by design.

2.

The pull-up is designed

the series resistance is

mwiitnhimaatrlu(e~1re0s%is)t.ance

in

series

with

a

switchable

PMOS.

This

PMOS

contribution

to

Figure 28. Recommended NRST pin protection

External

reset circuit(1)

NRST(2)

0.1 μF

VDD

RPU

Filter

Internal reset

MS19878V3

1. The reset network protects the device against parasitic resets.

2. TTahbeleus7e5r,motuhsetrewnisseurtehethraetstehtewleillvneol ot nbethteakNeRn SinTtopaincccoaunngtobybethloewdtehveicVeI.L(NRST) max level specified in

3. The external capacitor on NRST must be placed as close as possible to the device.

138/193

DS11929 Rev 10

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