STM32F101xx, STM32F102xx, STM32F103xx, STM32F105xx and ...

RM0008
USB on-the-go full-speed (OTG_FS)
Bit 15 EOPF: End of periodic frame interrupt
Indicates that the period specified in the periodic frame interval field of the Device
configuration register (PFIVL bit in OTG_FS_DCFG) has been reached in the current frame.
Note: Only accessible in Device mode.
Bit 14 ISOODRP: Isochronous OUT packet dropped interrupt
The core sets this bit when it fails to write an isochronous OUT packet into the RxFIFO
because the RxFIFO does not have enough space to accommodate a maximum size packet
for the isochronous OUT endpoint.
Note: Only accessible in Device mode.
Bit 13 ENUMDNE: Enumeration done
The core sets this bit to indicate that speed enumeration is complete. The application must
read the Device Status (OTG_FS_DSTS) register to obtain the enumerated speed.
Note: Only accessible in Device mode.
Bit 12 USBRST: USB reset
The core sets this bit to indicate that a reset is detected on the USB.
Note: Only accessible in Device mode.
Bit 11 USBSUSP: USB suspend
The core sets this bit to indicate that a suspend was detected on the USB. The core enters the
Suspended state when there is no activity on the data lines for a period of 3 ms.
Note: Only accessible in Device mode.
Bit 10 ESUSP: Early suspend
The core sets this bit to indicate that an Idle state has been detected on the USB for 3 ms.
Note: Only accessible in Device mode.
Bits 9:8 Reserved
Bit 7 GONAKEFF: Global OUT NAK effective
Indicates that the Set global OUT NAK bit in the Device control register (SGONAK bit in
OTG_FS_DCTL), set by the application, has taken effect in the core. This bit can be cleared by
writing the Clear global OUT NAK bit in the Device control register (CGONAK bit in
OTG_FS_DCTL).
Note: Only accessible in Device mode.
Bit 6 GINAKEFF: Global IN non-periodic NAK effective
Indicates that the Set global non-periodic IN NAK bit in the Device control register (SGINAK bit
in OTG_FS_DCTL), set by the application, has taken effect in the core. That is, the core has
sampled the Global IN NAK bit set by the application. This bit can be cleared by clearing the
Clear global non-periodic IN NAK bit in the Device control register (CGINAK bit in
OTG_FS_DCTL).
This interrupt does not necessarily mean that a NAK handshake is sent out on the USB. The
STALL bit takes precedence over the NAK bit.
Note: Only accessible in Device mode.
Bit 5 NPTXFE: Non-periodic TxFIFO empty
This interrupt is asserted when the non-periodic TxFIFO is either half or completely empty, and
there is space for at least one entry to be written to the non-periodic transmit request queue.
The half or completely empty status is determined by the non-periodic TxFIFO empty level bit
in the core AHB configuration register (TXFELVL bit in OTG_FS_GAHBCFG).
Bit 4 RXFLVL: RxFIFO non-empty
Indicates that there is at least one packet pending to be read from the RxFIFO.
Note: Accessible in both Host and Device modes.
Doc ID 13902 Rev 9 733/995