Datasheet

Application block diagrams STM32F405xx, STM32F407xx
186/202 DocID022152 Rev 8
Appendix A Application block diagrams
A.1 USB OTG full speed (FS) interface solutions
Figure 93. 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 94. 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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