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STM32F405OE Datasheet(PDF) 97 Page - STMicroelectronics

Part No. STM32F405OE
Description  ARM Cortex-M4 32b MCUFPU, 210DMIPS, up to 1MB Flash/1924KB RAM, USB OTG HS/FS
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Manufacturer  STMICROELECTRONICS [STMicroelectronics]
Direct Link  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

STM32F405OE Datasheet(HTML) 97 Page - STMicroelectronics

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DocID022152 Rev 4
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STM32F405xx, STM32F407xx
Electrical characteristics
Figure 30. High-speed external clock source AC timing diagram
Figure 31. 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 26 MHz crystal/ceramic
resonator oscillator. All the information given in this paragraph are based on
characterization results obtained with typical external components specified in Table 31. 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).
ai17528
OSC_IN
External
STM32F
clock source
VHSEH
tf(HSE)
tW(HSE)
IL
90%
10%
THSE
t
tr(HSE)
tW(HSE)
fHSE_ext
VHSEL
ai17529
OSC32_IN
External
STM32F
clock source
VLSEH
tf(LSE)
tW(LSE)
IL
90%
10%
TLSE
t
tr(LSE)
tW(LSE)
fLSE_ext
VLSEL


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