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STM32F030x4 bảng dữ liệu(PDF) 48 Page - STMicroelectronics

tên linh kiện STM32F030x4
Giải thích chi tiết về linh kiện  Value-line ARM-based 32-bit MCU with 16 to 64-KB Flash, timers, ADC, communication interfaces, 2.4-3.6 V operation
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nhà sản xuất  STMICROELECTRONICS [STMicroelectronics]
Trang chủ  http://www.st.com
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STM32F030x4 bảng dữ liệu(HTML) 48 Page - STMicroelectronics

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Electrical characteristics
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DocID024849 Rev 1
6.3.7
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 6.3.14. However,
the recommended clock input waveform is shown in Figure 12: High-speed external clock
source AC timing diagram.
Figure 12. High-speed external clock source AC timing diagram
Table 29. High-speed external user clock characteristics
Symbol
Parameter(1)
1. Guaranteed by design, not tested in production.
Conditions
Min
Typ
Max
Unit
fHSE_ext
User external clock source
frequency
18
32
MHz
VHSEH
OSC_IN input pin high level voltage
0.7VDD
-VDD
V
VHSEL
OSC_IN input pin low level voltage
VSS
-0.3VDD
tw(HSEH)
tw(HSEL)
OSC_IN high or low time
15
-
-
ns
tr(HSE)
tf(HSE)
OSC_IN rise or fall time
-
-
20
MS19214V2
VHSEH
tf(HSE)
90%
10%
THSE
t
tr(HSE)
VHSEL
tW(HSEH)
tW(HSEL)



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