ST STM32F405 Reference Manual page 1383

RM0090
35.2.2 Host-mode features
The OTG_HS interface features in host mode are the following:
•
It requires an external charge pump to generate V
•
It has up to 12 host channels (pipes), each channel being dynamically reconfigurable to
support any kind of USB transfer
•
It features a built-in hardware scheduler holding:
–
–
• It manages a shared RX FIFO, a periodic TX FIFO, and a nonperiodic TX FIFO for
efficient usage of the USB data RAM
•
It features dynamic trimming capability of SOF framing period in host mode.
35.2.3 Peripheral-mode features
The OTG_HS interface main features in peripheral mode are the following:
•
It has 1 bidirectional control endpoint 0
•
It has 5 IN endpoints (EP) configurable to support bulk, interrupt or isochronous
transfers
•
It has 5 OUT endpoints configurable to support bulk, interrupt or isochronous transfers
•
It manages a shared Rx FIFO and a Tx-OUT FIFO for efficient usage of the USB data
RAM
•
It manages up to 6 dedicated Tx-IN FIFOs (one for each IN-configured EP) to reduce
the application load
• It features soft disconnect capability
35.3 OTG_HS functional description
Figure 410
Up to 8 interrupt plus isochronous transfer requests in the periodic hardware
queue
Up to 8 control plus bulk transfer requests in the nonperiodic hardware queue
shows the OTG_HS interface block diagram.
USB on-the-go high-speed (OTG_HS)
RM0090 Rev 18
BUS
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