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STM32WLE4JC Datasheet(PDF) 98 Page - STMicroelectronics

No. de pieza STM32WLE4JC
Descripción Electrónicos  Multiprotocol LPWAN 32-bit Arm® Cortex®-M4 MCUs, LoRa®, (G)FSK, (G)MSK, BPSK, up to 256KB Flash, 64KB SRAM
PDF  145 Pages
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Fabricante Electrónico  STMICROELECTRONICS [STMicroelectronics]
Página de inicio  http://www.st.com
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STM32WLE4JC Datasheet(HTML) 98 Page - STMicroelectronics

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Electrical characteristics
STM32WLE5/E4xx
98/145
DS13105 Rev 8
The external clock signal has to respect the I/O characteristics detailed in Section 5.3.16:
I/O port characteristics.The recommend clock input waveform is shown in the figure below.
Figure 17. Low-speed external clock source AC timing diagram
5.3.10
Internal clock source characteristics
Parameters given in the table below are derived from tests performed under ambient
temperature and supply voltage conditions summarized in Table 25: General operating
conditions. The provided curves are characterization results, not tested in production.
High-speed internal (HSI16) RC oscillator
MS19215V2
VLSEH
tf(LSE)
90%
10%
TLSE
t
tr(LSE)
VLSEL
tw(LSEH)
tw(LSEL)
Table 60. Low-speed external user clock characteristics(1) – Bypass mode
Symbol
Parameter
Conditions
Min
Typ
Max
Unit
fLSE_ext
User external clock source
frequency
-
21.2
32.768
44.4
kHz
VLSEH
OSC32_IN input pin high-
level voltage
-
0.7 x
VDDx
-VDDx
V
VLSEL
OSC32_IN input pin low-
level voltage
-VSS
-
0.3 x VDDx
tw(LSEH)
tw(LSEL)
OSC32_IN high or low time
-
250
-
-
ns
ftolLSE
Frequency tolerance
Includes initial accuracy,
stability over temperature,
aging and frequency pulling
–500
-
+500
ppm
1. Guaranteed by design.
Table 61. HSI16 oscillator characteristics(1)
Symbol
Parameter
Conditions
Min
Typ
Max
Unit
fHSI16
HSI16 frequency
VDD = 3.0 V, TA = 30 °C 15.88
-
16.08
MHz



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