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STM32F383VC Datasheet(PDF) 71 Page - STMicroelectronics

Part # STM32F383VC
Description  Reset and power management
PDF  125 Pages
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Manufacturer  STMICROELECTRONICS [STMicroelectronics]
Direct Link  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

STM32F383VC Datasheet(HTML) 71 Page - STMicroelectronics

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STM32F383xx
Electrical characteristics
109
Low-speed external user clock generated from an external source
In bypass mode the LSE oscillator is switched off and the input pin is a standard GPIO.
The external clock signal has to respect the I/O characteristics in Section 6.3.13. However,
the recommended clock input waveform is shown in Figure 13.
Figure 13. Low-speed external clock source AC timing diagram
High-speed external clock generated from a crystal/ceramic resonator
The high-speed external (HSE) clock can be supplied with a 4 to 32 MHz crystal/ceramic
resonator oscillator. All the information given in this paragraph are based on design
simulation results obtained with typical external components specified in Table 37. In the
application, the resonator and the load capacitors have to be placed as close as possible to
the oscillator pins in order to minimize output distortion and startup stabilization time. Refer
to the crystal resonator manufacturer for more details on the resonator characteristics
(frequency, package, accuracy).
Table 36. Low-speed external user clock characteristics
Symbol
Parameter(1)
1. Guaranteed by design, not tested in production.
Conditions
Min
Typ
Max
Unit
fLSE_ext
User External clock source
frequency
-
32.768
1000
kHz
VLSEH
OSC32_IN input pin high level
voltage
0.7VDD
-VDD
V
VLSEL
OSC32_IN input pin low level
voltage
VSS
-0.3VDD
tw(LSEH)
tw(LSEL)
OSC32_IN high or low time
450
-
-
ns
tr(LSE)
tf(LSE)
OSC32_IN rise or fall time
-
-
50
MS19215V2
VLSEH
tf(LSE)
90%
10%
TLSE
t
tr(LSE)
VLSEL
tW(LSEH)
tW(LSEL)



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