ST STM32L4x6 Reference Manual page 1523

RM0351
31 30 29
Res. Res. Res. Res.
15 14 13
Res. Res. Res. EHEN
Bits 31:21 Reserved, must be kept at reset value.
Bit 20 OTGVER: OTG version
Selects the OTG revision.
0:OTG Version 1.3. In this version the core supports Data line pulsing and VBUS pulsing for
SRP.
1:OTG Version 2.0. In this version the core supports only Data line pulsing for SRP.
Bit 19 BSVLD: B-session valid
Indicates the device mode transceiver status.
0: B-session is not valid.
1: B-session is valid.
In OTG mode, you can use this bit to determine if the device is connected or disconnected.
Note: Only accessible in device mode.
Bit 18 ASVLD: A-session valid
Indicates the host mode transceiver status.
0: A-session is not valid
1: A-session is valid
Note: Only accessible in host mode.
Bit 17 DBCT: Long/short debounce time
Indicates the debounce time of a detected connection.
0: Long debounce time, used for physical connections (100 ms + 2.5 µs)
1: Short debounce time, used for soft connections (2.5 µs)
Note: Only accessible in host mode.
Bit 16 CIDSTS: Connector ID status
Indicates the connector ID status on a connect event.
0: The
1: The
Note: Accessible in both device and host modes.
Bits 15:13 Reserved, must be kept at reset value.
Bit 12 EHEN: Embedded host enable
It is used to select between OTG A device state machine and embedded Host state machine.
0: OTG A device state machine is selected
1: Embedded host state machine is selected
28 27 26 25
Res. Res. Res.
12 11 10 9
DHNP HSHNP HNP
EN EN RQ
rw
rw rw rw
OTG_FS
controller is in A-device mode
OTG_FS
controller is in B-device mode
DocID024597 Rev 3
USB on-the-go full-speed (OTG_FS)
24 23 22 21
Res. Res. Res. Res.
8 7 6 5
HNG
Res. Res. Res.
SCS
r
20 19 18 17
OTG
BSVLD ASVLD DBCT
VER
rw
r r r
4 3 2 1
Res. Res. Res. SRQ
rw
16
CID
STS
r
0
SRQ
SCS
r
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