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STM32F051K6 데이터시트(PDF) 56 Page - STMicroelectronics

부품명 STM32F051K6
상세설명  Low- and medium-density advanced ARM-based 32-bit MCU with 16 to 64 Kbytes Flash, timers, ADC, DAC and comm. interfaces
PDF  104 Pages
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제조업체  STMICROELECTRONICS [STMicroelectronics]
홈페이지  http://www.st.com
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STM32F051K6 데이터시트(HTML) 56 Page - STMicroelectronics

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STM32F051x
Electrical characteristics
Doc ID 022265 Rev 3
57/105
6.3.6
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 6.3.13. However,
the recommended clock input waveform is shown in Figure 12.
Figure 12.
High-speed external clock source AC timing diagram
Table 34.
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



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