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STM32F412XE bảng dữ liệu(PDF) 25 Page - STMicroelectronics

tên linh kiện STM32F412XE
Giải thích chi tiết về linh kiện  Arm®-Cortex®-M4 32b MCUFPU, 125 DMIPS, 1MB Flash, 256KB RAM, USB OTG FS, 17 TIMs, 1 ADC, 17 comm. interfaces
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nhà sản xuất  STMICROELECTRONICS [STMicroelectronics]
Trang chủ  http://www.st.com
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STM32F412XE bảng dữ liệu(HTML) 25 Page - STMicroelectronics

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STM32F412xE/G
Functional overview
42
it is independent from VDD or VDDA but it must be the last supply to be provided and the
first to disappear.
The following conditions VDDUSB must be respected:
–
During power-on phase (VDD < VDD_MIN), VDDUSB should be always lower than
VDD
–
During power-down phase (VDD < VDD_MIN), VDDUSB should be always lower than
VDD
–VDDUSB rising and falling time rate specifications must be respected.
–
In operating mode phase, VDDUSB could be lower or higher than VDD:
– If USB is used, the associated GPIOs powered by VDDUSB are operating
between VDDUSB_MIN and VDDUSB_MAX.
– If USB is not used, the associated GPIOs powered by VDDUSB are operating
between VDD_MIN and VDD_MAX.
Figure 6. VDDUSB connected to an external independent power supply



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