Datasheet

Application block diagrams STM32F427xx STM32F429xx
228/239 DocID024030 Rev 10
Appendix B Application block diagrams
B.1 USB OTG full speed (FS) interface solutions
Figure 103. USB controller configured as peripheral-only and used
in Full speed mode
1. External voltage regulator only needed when building a V
BUS
powered device.
2. 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 104. USB controller configured as host-only and used in full speed mode
1. The current limiter is required only if the application has to support a V
BUS
powered device. A basic power
switch can be used if 5 V are available on the application board.
2. 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.
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