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STM32L552CCT3PTR Datasheet(PDF) 213 Page - STMicroelectronics

Part # STM32L552CCT3PTR
Description  Ultra-low-power Arm® Cortex®-M33 32-bit MCUTrustZone®FPU, 165 DMIPS, up to 512 KB Flash memory, 256 KB SRAM, SMPS
PDF  340 Pages
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Manufacturer  STMICROELECTRONICS [STMicroelectronics]
Direct Link  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

STM32L552CCT3PTR Datasheet(HTML) 213 Page - STMicroelectronics

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DS12737 Rev 6
213/340
STM32L552xx
Electrical characteristics
307
5.3.8
External clock source characteristics
High-speed external user clock generated from an external source
In bypass mode the HSE 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 5.3.15. However,
the recommended clock input waveform is shown in Figure 33: High-speed external clock
source AC timing diagram.
Figure 33. High-speed external clock source AC timing diagram
Table 86. High-speed external user clock characteristics(1)
1. Guaranteed by design.
Symbol
Parameter
Conditions
Min
Typ
Max
Unit
fHSE_ext
User external clock
source frequency
Voltage scaling
Range 0 and 1
-8
48
MHz
Voltage scaling
Range 2
-8
26
VHSEH
OSC_IN input pin high
level voltage
-
0.7 VDDIOx
-VDDIOx
V
VHSEL
OSC_IN input pin low
level voltage
-VSS
-0.3 VDDIOx
tw(HSEH)
tw(HSEL)
OSC_IN high or low time
Voltage scaling
Range 0 and 1
7-
-
ns
Voltage scaling
Range 2
18
-
-
MS19214V2
VHSEH
tf(HSE)
90%
10%
THSE
t
tr(HSE)
VHSEL
tw(HSEH)
tw(HSEL)



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