STM32F469AI datasheet(29/220 Pages) STMICROELECTRONICS

29 / 220 page

DS11189 Rev 7

29/220

STM32F469xx

Functional overview

The following conditions 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 (USB OTG_HS/OTG_FS) is used, the associated GPIOs powered by

VDDUSB are operating between VDDUSB_MIN and VDDUSB_MAX.The VDDUSB

supplies both USB transceivers (USB OTG_HS and USB OTG_FS).

– If only one USB transceiver is used in the application, the GPIOs associated to

the other USB transceiver are still supplied by VDDUSB.

– If USB (USB OTG_HS/OTG_FS) is not used, the associated GPIOs powered

by VDDUSB are operating between VDD_MIN and VDD_MAX.

– If USB (USB OTG_HS/OTG_FS) is not used and the associated GPIOs

(VDDUSB must not be floating).

Figure 7. VDDUSB connected to an external independent power supply

The DSI (Display Serial Interface) sub-system uses several power supply pins that are

independent from the other supply pins:



VDDDSI is an independent DSI power supply dedicated for DSI Regulator and MIPI

D-PHY. This supply must be connected to global VDD.



VCAPDSI pin is the output of DSI Regulator (1.2 V), which must be connected

externally to VDD12DSI.



VDD12DSI pin is used to supply the MIPI D-PHY, and to supply clock and data lanes

pins. An external capacitor of 2.2 µF must be connected on VDD12DSI pin.



VSSDSI pin is an isolated supply ground used for DSI sub-system.



If DSI functionality is not used at all, then:

–

VDDDSI pin must be connected to global VDD.

MS37590V1

DDUSB_MIN

DD_MIN

time

DDUSB_MAX

USB functional area

DD =VDDA

USB non

functional

area

DDUSB

Power-on

Power-down

Operating mode

USB non

functional

area

STM32F469AI Datasheet(PDF) 29 Page - STMicroelectronics

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