Host-Mode Features; Peripheral-Mode Features - ST STM32F101 series Reference Manual

Advanced arm-based 32-bit mcus

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USB on-the-go full-speed (OTG_FS)

Host-mode features

The OTG_FS interface main features and requirements in host-mode are the following:

External charge pump for V

Up to 8 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.

The OTG_FS interface main features in peripheral-mode are the following:

1 bidirectional control endpoint0

3 IN endpoints (EPs) configurable to support Bulk, Interrupt or Isochronous transfers

3 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

Management of up to 4 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 8 interrupt plus isochronous transfer requests in the periodic hardware

Up to 8 control plus bulk transfer requests in the non-periodic hardware queue

DocID13902 Rev 15

voltage generation.

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