DocID024597 Rev 5 1623/1830
RM0351 USB on-the-go full-speed (OTG_FS)
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47.2.2 Host-mode features
The OTG_FS interface main features and requirements in host-mode are the following:
• External charge pump for V
BUS
voltage generation.
• Up to 12 host channels (pipes): each channel is dynamically reconfigurable to allocate
any type of USB transfer.
• Built-in hardware scheduler holding:
– Up to 12 interrupt plus isochronous transfer requests in the periodic hardware
queue
– Up to 12 control plus bulk transfer requests in the non-periodic hardware queue
• Management of a shared Rx FIFO, a periodic Tx FIFO and a nonperiodic Tx FIFO for
efficient usage of the USB data RAM.
47.2.3 Peripheral-mode features
The OTG_FS interface main features in peripheral-mode are the following:
• 1 bidirectional control endpoint0
• 5 IN endpoints (EPs) configurable to support Bulk, Interrupt or Isochronous transfers
• 5 OUT endpoints configurable to support Bulk, Interrupt or Isochronous transfers
• Management of a shared Rx FIFO and a Tx-OUT FIFO for efficient usage of the USB
data RAM
• Management of up to 6 dedicated Tx-IN FIFOs (one for each active IN EP) to put less
load on the application
• Support for the soft disconnect feature.
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