STM32WL33CBVATR datasheet(67/91 Pages) STMICROELECTRONICS

Part #	STM32WL33CBVATR

Description	Multiprotocol LPWAN 32-bit MCU Arm® Cortex®-M0 2(G)FSK, 4(G)FSK, ASK, D-BPSK, up to 256KB flash, 32KB SRAM

PDF	91 Pages

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Manufacturer	STMICROELECTRONICS [STMicroelectronics]

Direct Link	http://www.st.com

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67 / 91 page

6.3.16

RSTN pin characteristics

The RSTN 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 Section 6.3.1: Operating range.

Table 58. RSTN pin characteristics (specified by design - not tested in production)

Symbol

Parameter

Conditions

Min.

Typ.

Max.

Unit

VIL(RSTN)

RSTN input low level

voltage

0.3 x VDD

VIH(RSTN)

RSTN input high level

voltage

0.7 x VDD

Vhys(RSTN)

RSTN Schmitt trigger

voltage hysteresis

200

RPU

Weak pull up

equivalent resistor

VIN=GND

kΩ

Figure 15. Recommended RSTN pin protection

Note:

•

The reset network protects the device against parasitic resets.

•

The user must ensure that the level on the RSTN pin can go below the VIL(RSTN) maximum level

specified in Table 58, otherwise the reset is not taken into account by the device.

•

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

STM32WL33xx

Electrical characteristics

DS14221 - Rev 5

page 67/91

STM32WL33CBVATR Datasheet(PDF) 67 Page - STMicroelectronics

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