STM32F217VG datasheet(155/173 Pages) STMICROELECTRONICS

155 / 173 page

STM32F21xxx

Application block diagrams

Doc ID 17050 Rev 8

155/173

Figure 84.

USB OTG FS (full speed) host-only connection

The current limiter is required only if the application has to support a VBUS powered device. A basic power

switch can be used if 5 V are available on the application board.

The same application can be developed using the OTG HS in FS mode to achieve enhanced performance

thanks to the large Rx/Tx FIFO and to a dedicated DMA controller.

Figure 85.

OTG FS (full speed) connection dual-role with internal PHY

External voltage regulator only needed when building a VBUS powered device.

The current limiter is required only if the application has to support a VBUS powered device. A basic power

switch can be used if 5 V are available on the application board.

The ID pin is required in dual role only.

The same application can be developed using the OTG HS in FS mode to achieve enhanced performance

thanks to the large Rx/Tx FIFO and to a dedicated DMA controller.

STM32F20xx

VDD

VBUS

VSS

PA9

PA12

PA11

GPIO+IRQ

GPIO

Overcurrent

5 V Pwr

OSC_IN

OSC_OUT

ai17296c

Current limiter

power switch(1)

STM32F20xxx

VDD

VBUS

VSS

PA9

PA12

PA11

GPIO+IRQ

GPIO

Overcurrent

5 V Pwr

5 V to VDD

voltage regulator (1)

VDD

(3)

PA10

OSC_IN

OSC_OUT

ai17294c

Current limiter

power switch(2)

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