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STM32WB50CG Datasheet(PDF) 95 Page - STMicroelectronics

Part # STM32WB50CG
Description  Multiprotocol wireless 32-bit MCU Arm®-based Cortex®-M4 with FPU, Bluetooth® 5.2 or 802.15.4 radio solution
PDF  119 Pages
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Manufacturer  STMICROELECTRONICS [STMicroelectronics]
Direct Link  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

STM32WB50CG Datasheet(HTML) 95 Page - STMicroelectronics

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DS13047 Rev 5
95/119
STM32WB50CG STM32WB30CE
Electrical characteristics
110
Figure 21. Recommended NRST pin protection
1. The reset network protects the device against parasitic resets.
2. The user must ensure that the level on the NRST pin can go below the VIL(NRST) max level specified in
Table 68, otherwise the reset will not be taken into account by the device.
3. The external capacitor on NRST must be placed as close as possible to the device.
Table 68. NRST pin characteristics(1)
1.
Guaranteed by design.
Symbol
Parameter
Conditions
Min
Typ
Max
Unit
VIL(NRST)
NRST input
low level voltage
-
-
-
0.3 x VDD
V
VIH(NRST)
NRST input
high level voltage
-
0.7 x VDD
--
Vhys(NRST)
NRST Schmitt trigger
voltage hysteresis
--
200
-
mV
RPU
Weak pull-up
equivalent resistor(2)
2. The pull-up is designed with a true resistance in series with a switchable PMOS. This PMOS contribution to
the series resistance is minimal (~10%)
.
VIN = VSS
25
40
55
kΩ
VF(NRST)
NRST input
filtered pulse
--
-
70
ns
VNF(NRST)
NRST input
not filtered pulse
2 V ≤ VDD ≤ 3.6 V
350
-
-
MS19878V3
RPU
VDD
Internal reset
External
reset circuit
(1)
NRST
(2)
Filter
0.1 μF



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