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STM32F479AI bảng dữ liệu(PDF) 115 Page - STMicroelectronics

tên linh kiện STM32F479AI
Giải thích chi tiết về linh kiện  ARMCortex-M4 32b MCUFPU, 225DMIPS, up to 2MB Flash/3844KB RAM, USB OTG HS/FS, Ethernet, FMC, dual Quad-SPI, Crypto, Graphical accelerator, Camera IF, LCD-TFT & MIPI DSI
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STM32F479xx
Electrical characteristics
190
Figure 29. High-speed external clock source AC timing diagram
Figure 30. 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 37. 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
Cin(LSE)
OSC32_IN input capacitance(1)
--
5
-
pF
DuCy(LSE) Duty cycle
-
30
-
70
%
IL
OSC32_IN Input leakage current
VSS ≤VIN ≤VDD
--
±1
µA
1. Guaranteed by design.
Table 36. Low-speed external user clock characteristics (continued)
Symbol
Parameter
Conditions
Min
Typ
Max
Unit



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