ST STM32L4 5 Series Reference Manual page 1623

RM0351
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
•
Up to 12 host channels (pipes): each channel is dynamically reconfigurable to allocate
any type of USB transfer.
•
Built-in hardware scheduler holding:
–
–
• 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.
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
DocID024597 Rev 5
USB on-the-go full-speed (OTG_FS)
voltage generation.
BUS
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