ST STM32F7 Series - Figure 1. VDDUSB Connected to VDD Power Supply; Figure 2. VDDUSB Connected to External Power Supply

Power supplies AN4661
8/54 DocID027559 Rev 5
Figure 1. V
DDUSB
connected to V
DD
power supply
Figure 2. V
DDUSB
connected to external power supply.
In the STM32F7x3xx devices, the USB PHY HS sub-system uses an additional power
supply pin:
• The V
DD12OTGHS
pin is the output of the PHY HS regulator (1.2 V). An external
capacitor of 2.2 µF must be connected on the V
DD12OTGHS
pin.
Note: The PHY HS has another OTG_HS_REXT pin needed for calibration. This pin must be
connected to gnd via an external precise resistor (3
Kohm +/- 1%).
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