Figure 1. Vddusb Connected To Vdd Power Supply; Figure 2. Vddusb Connected To External Power Supply - ST STM32F7 Series Application Notes

Power supplies
In the STM32F7x3xx devices, the USB PHY HS sub-system uses an additional power
supply pin:
•
The V
capacitor of 2.2 µF must be connected on the V
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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Figure 1. V
DDUSB
Figure 2. V
DDUSB
pin is the output of the PHY HS regulator (1.2 V). An external
DD12OTGHS
DocID027559 Rev 5
connected to V
DD
connected to external power supply.
DD12OTGHS
power supply
pin.
AN4661