STM32F101xx, STM32F102xx, STM32F103xx, STM32F105xx and ...

RM0008
USB on-the-go full-speed (OTG_FS)
Bit 18 ADTOCHG: A-device timeout change
The core sets this bit to indicate that the A-device has timed out while waiting for the B-device
to connect.
Note: Accessible in both Device and Host modes.
Bit 17 HNGDET: Host negotiation detected
The core sets this bit when it detects a host negotiation request on the USB.
Note: Accessible in both Device and Host modes.
Bits 16:10 Reserved.
Bit 9 HNSSCHG: Host negotiation success status change
The core sets this bit on the success or failure of a USB host negotiation request. The
application must read the host negotiation success bit of the OTG Control and Status register
(HNGSCS in OTG_FS_GOTGCTL) to check for success or failure.
Note: Accessible in both Device and Host modes.
Bits 7:3 Reserved.
Bit 8 SRSSCHG: Session request success status change
The core sets this bit on the success or failure of a session request. The application must read
the session request success bit in the OTG Control and status register (SRQSCS bit in
OTG_FS_GOTGCTL) to check for success or failure.
Note: Accessible in both Device and Host modes.
Bit 2 SEDET: Session end detected
The core sets this bit to indicate that the level of the voltage on V BUS is no longer valid for a B-
Peripheral session when V BUS < 0.8 V.
Bits 1:0 Reserved.
Doc ID 13902 Rev 9 725/995