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STM32WL33CB Arkusz danych(PDF) 67 Page - STMicroelectronics

Numer części STM32WL33CB
Szczegółowy opis  Multiprotocol LPWAN 32-bit MCU Arm® Cortex®-M0 2(G)FSK, 4(G)FSK, ASK, D-BPSK, up to 256KB flash, 32KB SRAM
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Producent  STMICROELECTRONICS [STMicroelectronics]
Strona internetowa  http://www.st.com
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STM32WL33CB Arkusz danych(HTML) 67 Page - STMicroelectronics

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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
V
VIH(RSTN)
RSTN input high level
voltage
-
0.7 x VDD
-
-
Vhys(RSTN)
RSTN Schmitt trigger
voltage hysteresis
-
-
200
-
mV
RPU
Weak pull up
equivalent resistor
VIN=GND
25
40
55
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



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