STMicroelectronics STM32F405 Reference Manual page 1264

USB on-the-go full-speed (OTG_FS)
OTG_FS interrupt register (OTG_FS_GOTGINT)
Address offset: 0x04
Reset value: 0x0000 0000
The application reads this register whenever there is an OTG interrupt and clears the bits in
this register to clear the OTG interrupt.
31 30 29 28 27 26 25 24 23 22 21 20 19
Reserved
Bits 31:20 Reserved, must be kept at reset value.
Bit 19 DBCDNE: Debounce done
The core sets this bit when the debounce is completed after the device connect. The
application can start driving USB reset after seeing this interrupt. This bit is only valid when
the HNP Capable or SRP Capable bit is set in the OTG_FS_GUSBCFG register (HNPCAP
bit or SRPCAP bit in OTG_FS_GUSBCFG, respectively).
Note: Only accessible in host mode.
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, must be kept at reset value.
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_FS_GOTGCTL register
(HNGSCS in OTG_FS_GOTGCTL) to check for success or failure.
Note: Accessible in both device and host modes.
Bits 7:3 Reserved, must be kept at reset value.
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_FS_GOTGCTL 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
B-Peripheral session when V
Bits 1:0 Reserved, must be kept at reset value.
1264/1731
18 17 16 15 14 13 12 11 10
Reserved
rc_ rc_ rc_
w1 w1 w1
< 0.8 V.
BUS
DocID018909 Rev 11
9 8 7 6 5 4 3
Reserved
rc_ rc_
w1 w1
is no longer valid for a
BUS
RM0090
2 1 0
Res.
rc_
w1