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STM32MP151AAA3 Folha de dados(PDF) 144 Page - STMicroelectronics

Nome de Peças STM32MP151AAA3
Descrição Electrónicos  Arm® Cortex®-A7 650 MHz Cortex®-M4 MPU, TFT, 35 comm. interfaces, 25 timers, adv. analog
PDF  245 Pages
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Fabricante Electrônico  STMICROELECTRONICS [STMicroelectronics]
Página de início  http://www.st.com
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STM32MP151AAA3 Folha de dados(HTML) 144 Page - STMicroelectronics

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Electrical characteristics
STM32MP151A
144/245
DS12500 Rev 1
6.3.8
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 I/O.
Digital and analog bypass modes are available.
The external clock signal has to respect the Table 48: I/O static characteristics. However,
the recommended clock input waveform is shown in Figure 15 for digital bypass mode and
in Figure 16 for analog bypass mode. In analog bypass mode the clock can be a sinusoidal
waveform.
Figure 15. High-speed external clock source AC timing diagram (digital bypass)
Table 28. High-speed external user clock characteristics (digital bypass)(1)
1. Guaranteed by design.
Symbol
Parameter
Min
Typ
Max
Unit
fHSE_ext
User external clock source frequency
8
25
50
MHz
VSW (VHSEH -VHSEL) OSC_IN amplitude
0.7×VDD
-VDD
V
VDC
OSC_IN input voltage
VSS
-0.3×VSS
tW(HSE)
OSC_IN high or low time
7
-
-
ns
Table 29. High-speed external user clock characteristics (analog bypass)(1)
Symbol
Parameter
Min
Typ
Max
Unit
fHSE_ext
User external clock source frequency
8
25
48
MHz
duty cycle (Square wave)
45
50
55
%
duty cycle deterioration
0
±10(2)
±20(3)
%
VHSE
Absolute input range
0
-
VDD
VPP
OSC_IN peak-to-peak amplitude
0.2(4)
-0.75×VDD
V
tSU(5)
Time to start
TBD
-
TBD(6)
µs
ai17528b
OSC_IN
External
STM32
clock source
VHSEH
tf(HSE)
tW(HSE)
IL
90 %
10 %
THSE
t
tr(HSE)
tW(HSE)
fHSE_ext
VHSEL



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