ST STM32L4x6 Reference Manual page 1531

RM0351
The application must clear the OTG_GINTSTS register at initialization before unmasking
the interrupt bit to avoid any interrupts generated prior to initialization.
31 30 29
WKUP SRQ DISC CIDS
INT INT INT CHG
rc_w1 rc_w1 rc_w1 rc_w1
15 14 13
ISOO ENUM USB
EOPF
DRP DNE RST
rc_w1 rc_w1 rc_w1 rc_w1
Bit 31 WKUPINT: Resume/remote wakeup detected interrupt
Wakeup interrupt during suspend(L2) or LPM(L1) state.
– During suspend(L2):
In device mode, this interrupt is asserted when a resume is detected on the USB. In host
mode, this interrupt is asserted when a remote wakeup is detected on the USB.
– During LPM(L1):
This interrupt is asserted for either Host Initiated Resume or Device Initiated Remote
Wakeup on USB.
Note: Accessible in both device and host modes.
Bit 30 SRQINT: Session request/new session detected interrupt
In host mode, this interrupt is asserted when a session request is detected from the device.
In device mode, this interrupt is asserted when V
device.
Bit 29 DISCINT: Disconnect detected interrupt
Asserted when a device disconnect is detected.
Note: Only accessible in host mode.
Bit 28 CIDSCHG: Connector ID status change
The core sets this bit when there is a change in connector ID status.
Note: Accessible in both device and host modes.
Bit 27 LPMINT: LPM interrupt
In device mode, this interrupt is asserted when the device receives an LPM transaction and
responds with a non-ERRORed response.
In host mode, this interrupt is asserted when the device responds to an LPM transaction with
a non-ERRORed response or when the host core has completed LPM transactions for the
programmed number of times (RETRYCNT bit in OTG_GLPMCFG).
This field is valid only if the LPMCAP bit in OTG_GLPMCFG is set to 1.
Bit 26 PTXFE: Periodic Tx FIFO empty
Asserted when the periodic transmit FIFO is either half or completely empty and there is
space for at least one entry to be written in the periodic request queue. The half or
completely empty status is determined by the periodic Tx FIFO empty level bit in the
OTG_GAHBCFG register (PTXFELVL bit in OTG_GAHBCFG).
Note: Only accessible in host mode.
28 27 26 25
LPM
PTXFE HCINT
INT
rc_w1 r r
12 11 10 9
USB
ESUSP Res.
SUSP
rc_w1 rc_w1
Accessible in both device and host modes.
DocID024597 Rev 3
USB on-the-go full-speed (OTG_FS)
24 23 22 21
IPXFR/
IN
HPRT RST
Res. COMP
INT DET
ISO
OUT
r rc_w1 rc_w1
8 7 6 5
GO GI
NPTXF
Res. NAK NAK
E
EFF EFF
r r
BUS
20 19 18
IISOI OEP
IEPINT
XFR INT
rc_w1 r r
4 3 2
RXF OTG
SOF
LVL INT
r r rc_w1 r
is in the valid range for a B-peripheral
17 16
Res. Res.
1 0
MMIS CMOD
rc_w1 r
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